Time complexity: In the majority of situations, quicksort performs in order of nlogn. It takes n2 comparisons to sort the array if the list of elements is already sorted or almost sorted.
Quicksort takes O(n log n) time in expectation to sort an array of n unique elements, averaged across all n! permutations of n elements with the same probability. Therefore, using the Lomuto partition technique, this takes O(n2) time. We achieve the best situation, where each member of the array is equal, by applying the Hoare partition technique. O is the time complexity (n). When the array is sorted in reverse, the worst case scenario happens. Therefore, insertion sort's worst-case time complexity is O. (n2). Quick Sort has a total time complexity of O. (nLogn). In the worst scenario, it does O(n2) comparisons, however this is an uncommon occurrence. Quick Sort has a space complexity of O. (nLogn).
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as an it technician, you added a printer for a client. when you did this, you were prompted to select and install the drivers.which of the following can you do to avoid repeating this step for subsequent clients?
Simply connect your printer's USB cable to an available USB port on your PC and turn on the printer. To open the Printers & scanners system setting, click the Search icon on the taskbar, type Printers in the search bar, and then click Printers & scanners from the search results.
What is a Printer?
A printer is a piece of external hardware that produces a hard copy of electronic data stored on a computer or other device.
For example, if you made a report on your computer, you could print multiple copies to hand out at a staff meeting. Printers are one of the most commonly used computer peripherals, and they are commonly used to print text and photos.
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Your laptop's LCD screen is beginning to flicker and dim. You have checked the brightness setting to make sure that it is configured correctly.
Which of the following is the MOST likely cause of your screen issue?
The LCD screen inverter is failing.
Answer:
The LCD screen inverter is failing.
Define a structure named StockItem with two string fields, supplier and productName and one int field, catalogNumber. Then define a structure named Customer with string (i.e., char *) fields name, streetAddress, city, postalCode, phone. Assume that structures named Date and Money have already been defined (representing a date and a monetary amount respectively. Finally, define a structure named Purchase that has these fields: buyer of type Customer, itemSold of type StockItem, dateOfSale of type Date, paid of type Money, returnable of type int (i.e., a boolean). SUBMIT 4 of 4: Tue Jun 22 2021 12:19:04 GMT+0300 (GMT+03:00)
StockItem structure, char productName[50], supplier[50]; catalogNumber, int}; Customer structure, name, street address, city, postal code, phone, and 50 characters of name; };Purchase structure
Make a StockItem struct with the following fields: char productName[50], char supplier[50], int catalogNumber;
- Create the following fields in a structure called "Customer": char name[50], streetAddress[50], city[50], postalCode[50], and phone[50];
- Construct a structure called Purchase with the following fields: bool returnable; struct Customer buyer; struct StockItem itemSold; struct DatedateOfSale; struct Money paid;
};
* It is expected that struct Date and Money was built in the manner described in the question.
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An ANOVA can find significant positive main effects at the same time as a significant negative interaction effect. True False
that is averaged over all other independent variable levels in experimental design and variance analysis.
Is it possible to have a large interaction but no major effect?
When the interaction is there, is it really required to include both main effects? No, you do not always require primary effects when there is an interaction, to put it simply. The interaction term won't, however, signify the same thing as it would if both primary impacts were taken into account.
What connection exists between interactions and major effects?
The impact one independent variable has on the dependent variable without taking into consideration other independent variables is known as a primary effect. The impact of one independent variable on another independent variable and how that impact affects the dependent variable is known as an interaction.
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Which of the following will lead to a compile-time error? Mark all that apply.
1
if (a > b) ( c = 0; )
2
if (a > b) { c = 0; }
3
if (a > b) c = 0 else b = 0;
4
if (a > b) c = 0;
5
if (a > b) then c = 0;
6
if a > b { c = 0; }
7
if a > b, then c = 0
All of the following will lead to a compile-time error:
if (a > b) ( c = 0; )if (a > b) then c = 0;if a > b { c = 0; }if a > b, then c = 0Explanation:
In the given examples, 1, 2, 3, and 4 all have syntax errors that would cause a compile-time error. Example 5 has a syntax error because the keyword then is not used in most programming languages. Example 6 has a syntax error because it is missing the opening and closing parentheses around the condition. Example 7 has a syntax error because the , and then keywords are not used in most programming languages.
The statements that will typically lead to a compile-time error are as follows:
if (a > b) ( c = 0; ).if (a > b) then c = 0;if a > b { c = 0; }.if a > b, then c = 0.Thus, the correct options for this question are A, B, E, and G.
What is a compile-time error?A compile-time error may be characterized as those errors that indicate something that we need to fix before compiling the code. A compiler can easily detect these errors. It is the reason why we call them compile-time errors.
The above-mentioned statements contain errors that would cause a compile-time error. Statements 3 and 4 have syntax errors because the keyword then is not used in most programming languages and it is missing the opening and closing parentheses around the condition respectively.
Therefore, the correct options for this question are A, B, E, and G.
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Does anybody have or know what I can use to study for a C++ computer science final? I've been trying to find a study guide, but I cannot seem to find one anywhere.
Note that one of the best ways to study for a C++ computer science final is to use online tutorials and resources. There are many websites that offer comprehensive tutorials and guides for C++ programming. Additionally, look for practice questions and tutorials for the topics you will be tested on in your final exam.
What is C++?This is a programming language created as an expansion of the C programming language, sometimes known as "C with Classes."
Utilizing a combination of online resources and textbooks can help you gain a better understanding of the material. Additionally, you can join online forums and ask fellow C++ programmers for advice and guidance. Lastly, don’t forget to build your own C++ programs.
This can help you gain a better understanding of the language and its syntax. With enough practice, you can be well-prepared for your final exam.
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Consider a system for processing student test scores. The StudentAnswerSheet class is given and will be used as part of this system and contains a student's name and the student's answers for a multiple-choice test. Note the class attribute (key) and method (setKey) for the loading and storing the answer key. The answers are represented as "char" with an omitted answer being represented by the question mark '?'. These answers are stored in an array in which the position of the answer corresponds to the question number on the test (question numbers start at zero). A student's score on the test is computed by comparing the student's answers with the corresponding answers in the answer key for the test. One point is awarded for each correct answer and 1/4 point is deducted for each incorrect answer. Omitted answers do not change the student's score.
Write a class GradeStudents with a "main" method only that will read, using Scanner, a filename from the user (assumed to exist and in the correct format). Then read the comma-delimited input file containing the answer key in the first row and student names/answers in other rows, one per line.
First read and load the key. Then read, grade and output each student. Also determine the highest scoring student. If ties for highest scoring save all their names. You do not know how many questions are on the test until you read the first line of the file, which is always the key.
Given class:
public class StudentAnswerSheet {
private String name;
private char [] answers;
private static final char BLANK='?';
private static final String DEFAULT_NAME="Noname";
private static final double CORRECT_POINTS=1., BLANK_POINTS=0., WRONG_POINTS=-.25;
private static char [] key;
public static void setKey(char [] answerKey) {
if (answerKey==null || answerKey.length==0) {
key=new char[] {'?'};
}
else {
key=new char[answerKey.length];
for (int i=0;i
key[i]=answerKey[i];
}
}
}
public StudentAnswerSheet (String n, char [] a) {
if (n==null) {
name=DEFAULT_NAME;
}
else {
name=n;
}
if (a!=null && a.length>0) {
answers=new char[a.length];
for (int i=0;i
answers[i]=a[i];
}
}
else {
answers = new char[] {'?'};
}
}
public String getName() { return name; }
public double getScore () {
double total=0;
if (key!=null && key.length == answers.length) {
for (int i=0;i
if (answers[i]==BLANK) {
total+=BLANK_POINTS;
}
else if (answers[i]==key[i]) {
total+=CORRECT_POINTS;
}
else {
total+=WRONG_POINTS;
}
}
}
else {
total=Double.NEGATIVE_INFINITY;
}
return total;
}
public String toString () {
String temp = name;
for (int i=0; i
temp = temp + ' ' + answers[i];
}
return temp;
}
}
SAMPLE INPUT FILES:
answers1.txt
KEY,e,e,b,b,e,b,c,d,a,e
Matt,a,e,b,b,?,b,c,d,a,e
Cami,e,e,b,b,?,b,c,d,a,e
John,?,?,?,?,?,?,c,d,a,e
Mary,a,a,a,a,a,a,c,d,a,e
Fred,e,e,b,b,?,b,c,d,a,ea
answers2.txt
KEY,e,e,b,b,e,b,c,d,a,e,e,e,b,b,e,b,c,d,a,e
Matt,a,e,b,b,?,b,c,d,a,e,a,a,a,a,a,a,c,d,a,e
Cami,e,e,b,b,?,b,c,d,a,e,?,?,?,?,?,?,c,d,a,e
John,?,?,?,?,?,?,c,d,a,e,a,a,a,a,a,a,c,d,a,e
Mary,a,a,a,a,a,a,c,d,a,e,a,a,a,a,a,a,c,d,a,e
Fred,e,e,b,b,?,b,c,d,a,e,e,e,b,b,?,b,c,d,a,e
To write a class GradeStudents with a "main" method only that will read, using Scanner, a filename from the user (assumed to exist and in the correct format) check the code given below.
What is a filename?The title of a file and its extension are included in its filename. An entire file name is, for instance, "readme.txt."
Additionally, only the first part of a file may be described in the file name. A file with the name "readme" and the file name extension ".txt" is an example.
↓↓//CODE//↓↓
package code;
public class TestResults
{
private StudentAnswerSheet[] students;
private int count = 0;
private static final int DEFAULT_SIZE = 10;
public TestResults(int size)
{
if (size > 0) {
students = new StudentAnswerSheet[size];
}
else {
students = new StudentAnswerSheet[DEFAULT_SIZE];
}
count = 0;
}
public boolean addStudentAnswerSheet(StudentAnswerSheet x) {
boolean inserted = false;
if (x != null && count < students.length) {
students[count] = x;
count++;
inserted = true;
}
return inserted;
}
public String highestScoringStudent(char[] answerKey) {
double maxScore = Double.MIN_VALUE;
double tempScore;
// Finding maximum score
for (StudentAnswerSheet sheet : students) {
tempScore = sheet.getScore(answerKey);
if (tempScore > maxScore) {
maxScore = tempScore;
}
}
// building highest achievers list
StringBuilder res = new StringBuilder();
for (StudentAnswerSheet sheet : students) {
if (sheet.getScore(answerKey) == maxScore) {
res.append(sheet.getName()).append(" ");
}
}
// returning list string
return res.toString().strip();
}
}
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what is the unit of force
Answer:The SI unit of force is the newton, symbol N. The base units relevant to force are:
The metre, unit of length — symbol m
The kilogram, unit of mass — symbol kg
The second, unit of time — symbol s
Explanation:Force is defined as the rate of change of momentum. For an unchanging mass, this is equivalent to mass x acceleration.
So, 1 N = 1 kg m s-2, or 1 kg m/s2.
engine that searches web pages in its database that contain specific words or phrases engine that provides access to academic information for research service that connects you with a human librarian finds subjective content, such as comments, reviews, and opinions offers the convenience of searching many sources from one web site term general search metasearch engine online reference specialty search social search tool
Internet portals known as general search engines allow users to look up specific words or phrases in a large collection of collated materials.
Scholar is a searching engine for academic material, and it is without a doubt the best one available. It uses the effectiveness of searches on academic articles and patents. On every social networking platform, friends must certify their friendship. E-commerce can be done without having an Internet connection. Some individuals refer to e-commerce conducted on mobile devices using the phrase "m-commerce" (mobile commerce). When a quote, summary, paraphrase, or information is about to be borrowed from another source, the narrative will use a signal word to let the reader know. Typically, the signal phrase includes the statement's author's name.
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given the below four faces, darkness or number of dots represents density. lines are used only to distinguish regions and do not represent points. for each figure, could you use partition, hierarchical, density, and other algorithms we learned in class to find the patterns represented by the nose, eyes, and mouth? please list at least 3 different types of algorithms and explain the pros and cons of each. g
Darkness or number of dots represents density. Lines are used only to distinguish regions and do not represent points.
What is hierarchical and density?The figure below illustrates how cluster relationships can be seen visually as a result of hierarchical clustering. Density clustering, more precisely the Density-Based Clustering of Applications with Noise algorithm, groups together points that are closely spaced out and classifies the other points as noise.It's common to group objects using hierarchical clustering. By dividing objects into groups, it makes them comparable to one another and distinguishable from those in other groups. A hierarchical tree termed a dentrogram uses visual representations of clusters.We provide a theoretically and practically enhanced density-based, hierarchical clustering method, offering a clustering hierarchy from which a condensed tree of relevant clusters can be built.To learn more about refer hierarchical and density to:
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In addition, you make sure to use _____ font sizes and colors for all of your data visualization titles.
Additionally, you take care to employ uniform font colors and sizes throughout all of your titles for data visualization.
What does the word "font" mean?The term "font" describes a collection of text or typographic characters that may be printed or displayed in a certain size and style. In both physical and online text, many font types are utilized.
Contrast a typeface with a font.A font is a specific collection of glyphs, usually known as kinds, which include the letters of the alphabet and indeed the associated marks for punctuation and numbers. For instance, Helvetica is a popular typeface. A typeface's specific set of glyphs is referred to as a font.
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The complete question is-
After reviewing your slide, you realize that the visual elements could be improved. You do this by first choosing one data visualization to share on this slide, then create another slide for the second data visualization.
In addition, you make sure to use _____ font sizes and colors for all of your data visualization titles.
Which functions read from the keyboard or write to the monitor? Choose all correct answers. (Please be advised that there is penalty for incorrect answers) O stdin O stdout O print O fprintf O getchar O getc O putchar
In the question, some functions are used to read data from keyobard or write to monitor.
In the given question, different functions are given such as stdin, stdout, print, fprintf, getchar, putchar and getc either to read the data from keyboard or print/write to monitor.
The detail of each function are given below.
Functions that read data from keyboards are:getchar(): The getchar function read data from keyboard in form of characters.
getc(): it reads a single character from the current stream position and advances the stream position to the next character and it is identical to getchar() but it read one by one character.
However, stdin is not a function, but it is a class that provides methods to read the data such as getchar() and getc() etc.
Functions that print or write to monitor are:print(): this function print or write to monitor.
fprintf(): this function also print or write to monitor but in the formatted way.
putchar(): This function is used to print one charter to monitor or on the screen.
However, stdout is not a function, but it is a class that provides methods to print the data to screen such as print, fprint, putchar() etc.
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of the following statements, choose the one that most accurately distinguishes social media providers from social media sponsors.
The statement " Social media providers build and host website platform" is one of the most accurately distinguishing social media providers from social media sponsors.
What are web platforms?
The World Wide Web Consortium, as well as other standardization organizations like the Web Hypertext Application Technology Working Group, the Unicode Consortium, the Internet Engineering Task Force, and Ecma International, developed a collection of technologies known as the Web platform as open standards. a general phrase used to describe a website's architecture Website authoring tools like Dreamweaver or WordPress, as well as server software like Microsoft's IIS or Apache, can both be referred to as web platforms. web publishing and web authoring software.
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3.Which of the following refers to a division of labor that ensures no one person can singlehandedly compromise the security of data, finances, or other resources?
a. MAC
b. RBAC
c. DAC
d. SoD
Segregation of Duties(SoD) is a system of delegation that makes sure no one person can, on their own, jeopardize the security of information, money, or other resources.
A business's internal controls and long-term risk management depend on the fundamental building block of segregation of duties (SOD). The foundation of the SOD principle is the division of duties among multiple parties or departments to carry out the crucial tasks of a vital process. Fraud and mistake hazards are significantly less controllable without this division in essential procedures.
This might be the SOD foundation for creating an accounting and finance report. The roles that can only be performed by different people are indicated by boxes with an "X" in them. For instance, the Engineer who creates the queries for a report shouldn't also be the one to approve their logic or accuracy.
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To find a value in an ordered array of 100 items, how many values must binary search examine at most? A) 7. B) 10. C) 50. D) 100. E) 101.
The values that binary search must examine at most is A. 7.
What is binary search?Binary search is a type of search for array in many programming language. Binary search work is to divide the array into two part repeatedly until the value is found.
Examined process of binary search can be calculated mathematically using [tex]log_2[/tex]. Then, [tex]log_2[/tex] (100) is equal to 6.64, we round up so we get 7.
For visualization the logic we only need to divide the amount of item in array by 2 until the result is approximately 1. So,
100 / 2 = 50
50 / 2 = 25
25 / 2 = 12.5 (round up to 13)
13 / 2 = 6.5 (round up to 7)
7 / 2 = 3.5 (round up to 4)
4 / 2 = 2
2 / 2 = 1
So, we divide 100 item array by 2 for 7 times. Then, the values must binary search examine at most is 7.
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Describe the purpose the process state column displayed by the ps -l command. What values may appear in this column, and what do these values indicate?
The PS command's -l option provides much more details about each process than the -f option does. Systems administrators value the process state (S) column the most because it shows what the process is doing right now. The (S) value denotes a sleeping process, the (R) value denotes a running process, the (T) value denotes a process that has terminated or is being tracked by another process, and the (Z) value denotes a zombie process.
In a computer system that is capable of carrying out numerous tasks, processes might be in a variety of states. These distinct states might not be recognized as such by the operating system kernel. However, they do provide a useful paradigm for understanding processes. Process alludes to the active program. A process goes through numerous phases known as process states throughout its life cycle. As a process progresses through its life cycle, it may be in a variety of states, including New, Ready, Running, Waiting or Blocked, Terminated or Completed, Suspend Ready, and Suspend Wait or Blocked. In this approach, there are five states: running, ready, blocked, new, and exit. When a new job or process enters the queue, the model kicks in; the process is initially admitted to the queue before moving into the ready state.
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1. find a procedure for sampling uniformly on the surface of the sphere. a. use computer to generate a thousand points that are random, independent, and uniform on the unit sphere, and print the resulting picture. b. by putting sufficiently many independent uniform points on the surface of the earth (not literally but using a computer model, of course), estimate the areas of antarctica and africa, compare your results with the actual values, and make a few comments (e.g., are the relative errors similar? would you expect them to be similar? if not, which one should be bigger? etc.)
The probability density function (PDF) for uniform density across a unit sphere becomes P = 14 since the surface area of a sphere is [tex]A=4\pi r^{2}[/tex].
How do you sample uniformly from a sphere?The three conventional normally distributed values X, Y, and Z can be used to create a vector, V=[X,Y,Z], which can be used as an alternate technique to create uniformly distributed points on a unit sphere.
V= [tex]4 / 3 \pi r^{3}[/tex]
A spherical sector's total surface area is equal to the sum of the zone's area and the lateral areas of its bordering cones. A spherical sector's volume, whether open or conical, is equal to one-third of the product of the zone's area and sphere's radius.
Additionally, Archimedes demonstrated that a sphere's surface area is [tex]4\pi r^{2}[/tex]. This proof was the crowning achievement of Archimedes' mathematical career, and he requested that it be memorialized on his tombstone as a sphere enclosed in a cylinder. the sphere enclosed by the cylinder.
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the valid password must contain at least one upper case and at least one lower case letter. print true when the password is valid, if not print false.
Here is a Python solution that will check if a password contains at least one upper case and at least one lower case letter:
def check_password(password):
has_upper = False
has_lower = False
for c in password:
if c.isupper():
has_upper = True
elif c.islower():
has_lower = True
return has_upper and has_lower
# Test the function
password = "abcdefGHI"
if check_password(password):
print("Valid password")
else:
print("Invalid password")
This function will loop through each character in the password and check if it is an upper case or lower case letter. If it finds at least one of each, it will return True. Otherwise, it will return False.
Python
High-level, all-purpose programming languages like Python are available. With the usage of extensive indentation, its design philosophy places an emphasis on code readability.
Garbage collection and dynamic typing are features of Python. Programming paradigms supported by it include structured (especially procedural), object-oriented, and functional programming. Due to its extensive standard library, it is frequently called a language with "batteries included."
As a replacement for the ABC programming language, Guido van Rossum started developing Python in the late 1980s. Python 0.9.0 was its initial release. List comprehensions, cycle-detecting garbage collection, reference counting, and support for Unicode were among the new features added to Python 2.0 in 2000. When Python 3.0 was introduced in 2008, it underwent a significant rewrite that left certain functionality incompatible with prior releases. 2020 saw the end of Python 2 with version 2.7.18.
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Synergistic teamwork requires a commitment on the part of all parties to look for and work for win/win solutions. This can happen only when there are high levels of mutual trust and communication: "Not your way, not my way, but a better way."
Yes Synergistic teamwork requires a commitment on the part of all parties to look for and work for win/win solutions
What is synergistic teamwork?
Team synergy is the process through which a group of people collaborates to carry out a task by utilizing each person's abilities and distinctive viewpoints to achieve greater achievements than they could have done on their own.
Team synergy applies to teamwork the notion that the whole is greater than the sum of its parts. Team members can be fully themselves at work, bringing their individual life experiences, opinions, skills, and communication styles.
creates a stronger team. A team can be stronger overall if it includes a variety of talented people.enhances financesbetter work is produced.increases diversityenhances originality.Hence to conclude the synergistic team work requires a commitment
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which of the following types of software programs would an employee use to prepare a form letter informing the company's clients of a change in product pricing:
Word processing is a software programs would an employee use to prepare a form letter informing the company's clients of a change in product pricing.
Definition of Word Processing SoftwareWord Processor Software is a
document processing program contains text and images that have a lot
privilege and very professional compared to existing text programs.
In a text-based operating system like DOS we can use the copy command
copy con for creating text files, although they are very, very limited. Whereas
in a GUI operating system like Windows, there is actually a notepad or
Wordpad whose ability to process words is quite good. However
because of the demands on the need to work with text and other objects
which are increasingly complex, in the end you have to use software that can actually fulfill it.
Currently there are a lot of word processing software that can
perform a variety of very complex tasks. Examples are
Wordstar, ChiWriter, WordPerfect, MS Work, Microsoft Word, KWriter and AmiPro.
The hallmark of word processing software in general is processing from
characters, words, sentences, which eventually form a paragraph, a group
paragraphs make up a page, and sets of pages make up a page
manuscripts which in this case are referred to as files or documents.
The main capabilities of word processing software include writing, forming (formatting) adding, deleting, saving and printing.
Your question is incomplete but most probably your full question was:
Which of the following types of software programs would an employee use to prepare a form letter informing the company's clients of a change in product pricing:
a. Word processing
b. Spreadsheet
c. Presentation
d. Database
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scroll down to complete all parts of this task. calculate the amount for each item below related to smith's tax basis in the partnership interest at the end of year 1 using the information included in the exhibits. not all entries may be needed for the determination. indicate decreases in tax basis by using a leading minus (-) sign. for each item, enter the appropriate amount in the associated cell. if the amount is zero or no amount is required, enter a zero (0) or leave the cell blank.
Excel will return zero (0) if the cell is empty. This feature can be used to your advantage to prevent blank cells from having an impact on your formulae.
How can a cell with a value of 0 be made blank?To accomplish this, use the IF function. To return a blank cell when the value is 0, use a formula similar to this: =IF(A2-A3=0,””,A2-A3)
Choose a worksheet from the list of display possibilities for this worksheet, and then choose from the alternatives below: Choose the Show a zero in cells that have a zero value check box to make the value 0 visible in cells. Remove a check mark from the Show a zero in cells that have a zero value check box to display zero values as blank cells.
Ctrl + F will bring up the Find and Replace dialogue. 2. Click the Replace tab in the Find and Replace dialogue, enter 0 in the Find what text box, a space in the Replace with text box, click Options to expand the dialogue, and then select Match full cell contents.
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keeping anti-virus applications up to date is an extremely important part of securing a network. anti-virus applications are constantly on the lookout for any sort of malicious application that could infect a device. which of the following might be a common update applied to anti-malware applications?
Antivirus software often operates using one of two methods: either it scans files and programs as they reach your device and compares them to known viruses, or it analyses program.
Furthermore, the bulk of antivirus software has the ability to either quarantine or destroy troublesome infections. Antivirus software is one of the most important tools you may have to protect your device. Understanding how antivirus software works is essential since attacks on your devices are becoming more sophisticated. Then, you'll be able to choose the things that are best for you.
Software that combats viruses is exactly what antivirus software is as its name suggests. It does this by means of a three-part system:
monitoring for viruses
detecting and removing viruses
As we stress in our digital security advice, your device needs malware protection to stay secure. Actually, malware risks are more prevalent than ever right now. For instance, between 2009 and 2019, the number of malware infections rose by more than 6,500%, from over 12 million to over 812 million. 1 Due to this rise, many devices now come pre-installed with antivirus and/or anti-malware software. The problem is that these systems typically do not offer complete threat protection.
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Which of the following commands allows a standard user to execute a single command as root without actually switching to the root account?Group of answer choicessudoersudosudoas
The correct response is b) sudo. The Linux command sudo, which stands for "super user do," enables the execution of programs as either the super user (also known as the root user) or another user.
Users must by default submit their own password for authentication, not the password of the target user, in contrast to the comparable command su. The system runs the requested command after authentication, if the configuration file (usually /etc/sudoers) grants the user access. The configuration file enables specific access rights, such as allowing commands only from the invoking terminal, needing a password per user or group, requiring a password to be entered each time, or never requiring a password at all for a given command line. Additionally, it can be set up to allow giving parameters or multiple instructions. The program sudo, which stands for superuser do or substitute user do, launches an elevated prompt without requiring you to assume a different identity. You can issue single commands as root or as another user, depending on the settings in the /etc/sudoers file.
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Write a program that will output the sum of two quadratic polynomials. Your program must do the following: 1. Define an abstract data type, Poly with three private data members a, b and c (type double) to represent the coefficients of a quadratic polynomial in the form: ax^2 + bx + c 2. Include a constructor in the Poly class to initialize all private data members with caller-supplied values (in addition to the default constructor!) 3. Overload the addition operator to return the sum of two Poly objects. 4. Overload the << (output) operator to output Poly objects in the following format, e.g.,: ax^2 + bx + c Where a, b and c are the coefficients of the Poly object. Do not display the a or b terms if they have zero coefficients. Moreover, if any coefficient is negative it should be precede by a minus sign, and not a plus sign. 5. In your main () function, declare and initialize two Poly objects, q1 and q2, to represent the following polynomials: 3x^2 + 4x - 2 and -4x + 10. Also declare a third, un-initialized Poly object named sum. 6. Output the sum of the two polynomials to the console using the following C++ code exactly as it appears:
The program that will output the sum of two quadratic polynomials
#include<iostream>
using namespace std;
class Poly
{
private:
double a;
double b;
double c;
public:
Poly();
Poly(double a1, double b1, double c1);
Poly operator+(Poly q);
friend ostream &operator<<(ostream &output, Poly q);
};
Poly::Poly()
{
a = 0;
b = 0;
c = 0;
}
Poly::Poly(double a1, double b1, double c1)
{
a = a1;
b = b1;
c = c1;
}
Poly Poly::operator+(Poly q)
{
Poly sum;
sum.a = a + q.a;
sum.b = b + q.b;
sum.c = c + q.c;
return sum;
}
ostream &operator<<(ostream &output, Poly q)
{
if (q.a != 0)
output << q.a << "x^2";
if (q.b > 0)
output << " + " << q.b << "x";
else if (q.b < 0)
output << " - " << -q.b << "x";
if (q.c > 0)
output << " + " << q.c;
else if (q.c < 0)
output << " - " << -q.c;
return output;
}
int main()
{
Poly q1(3, 4, -2);
Poly q2(-4, 10, 0);
Poly sum;
sum = q1 + q2;
cout << sum;
return 0;
}
//Output: x^2 - x + 8
What is program?
A program is a set of instructions that is designed to cause a computer to perform a specific task. Programs are written in a variety of languages, including Java, C, Python, and others. Programs can be used to play games, create documents, control machines, and perform countless other activities. Programs are written in a set of instructions that are followed by the computer in order to achieve the desired result. Programs can also be used to automate tasks, allowing users to complete complex operations with minimal effort. With modern technology, programs can also be used to create artificial intelligence, allowing computers to learn and adapt to new situations.
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The Collections class of Java Collection Framework has several methods (e.g. sort(), min(), max()) that require natural ordering of the classes to be handled. Explain the two possible conditions that must be satisfied on the classes to be able to use the sort()method to arrange the list of objects these classes.
Answer:
Explanation:
Java Collections sort() Method :
By default, this method sorts the unsorted list into ascending order , according to the natural ordering of the list items. We can use Collections.reverseOrder() method for reverse sorting.
Condition are basically for any sorting algo. First one the Output is in non-decreasing order (Each elements is no smaller than the previous element according to the desired total order). Second is the output is a permutation (a reordering, yet retaining all of the original elements) of the input.
problem 3 given the root of a binary tree, return the level order traversal of its nodes' values, i.e., from left to right, level by level. def levelorder(root: treenode) -> list[list[int]]: example: the returned result of levelorder(root 1) should be a nested list [[5], [4, 8], [11, 13, 4], [7, 2, 5, 1]]. the ith elment of the nested list is a list of tree elements at the ith level of root 1 from left to right. (we had this problem before in assignment 3.) def level order(root: treenode):
The program for the given question is:
class Solution {
public:
vector<vector<int> > levelOrder(TreeNode *root) {
vector<vector<int> > result;
if (!root) return result;
queue<TreeNode*> q;
q.push(root);
q.push(NULL);
vector<int> cur_vec;
while(!q.empty()) {
TreeNode* t = q.front();
q.pop();
if (t==NULL) {
result.push_back(cur_vec);
cur_vec.resize(0);
if (q.size() > 0) {
q.push(NULL);
}
} else {
cur_vec.push_back(t->val);
if (t->left) q.push(t->left);
if (t->right) q.push(t->right);
}
}
return result;
}
};
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Hadoop is primarily a(n) ________ file system and lacks capabilities we'd associate with a DBMS, such as indexing, random access to data, and support for SQL.
distributed
Hadoop is primarily distributed File systems are used instead of DBMSs, which lack features like indexing, random access to data, as well as support for SQL.
What is SQL?
SQL (Structured Query Language) is a database programming language used to store, manipulate, and query data in a relational database. It is the most widely used programming language for database management systems. SQL consists of commands that are used to perform tasks such as retrieving data from a database, updating data in a database, modifying a database schema, and creating new database objects. It is a powerful language that allows users to quickly and efficiently manage data with minimal effort. SQL can be used in a wide variety of applications, including web development, data analysis, and database administration. It is an essential skill for any database professional, and is a great way to get started in the world of database programming.
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How many records will the following query in the DOCTORS AND SPECIALTIES database return? SELECT table_name, column_name FROM user_tab_columns; DOCTORS AND SPECIALTIES Observe the DOCTORS AND SPECIALTIES database: DOCTOR DocID DocName 111 Jill 222 Linda 333 Lisa 444 Sue 555 Lola NoOfPatients SpecID 20 SUR 20 SUR 30 RAD 15 ANE 15 ANE SPECIALTY SpecID SpecName SUR Surgery RAD Radiology ANE Anesthesiology a. 2 b. 5 c. 6 d. 7 e. 10
Note that in the absence of database records, we cannot ascertain how many records the above query will return. Note that this query is an SQL QUERY.
What is an SQL Query?An SQL query is a request for data from a database. It is written in a special language called SQL (Structured Query Language) that is designed specifically for accessing and manipulating data in a database. Queries are used to retrieve, add, update, or delete data from a database.
A database is a collection of data that is organized and stored in a way that allows for efficient retrieval and manipulation. It is typically used to store and manage large amounts of structured data, such as information about customers, products, or transactions. Databases are often used in computer applications to store and manage data.
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refers to a broad class of web sites and services that allow users to connect with friends, family, and colleagues online as well as meet people with similar interests or hobbies.
Social networks refer to a broad class of Web sites and services that allows users to connect with friends, family, and colleagues online as well as meet people with similar interests or hobbies.
In today's Internet-based society and business, social networking is more crucial than ever. By connecting businesses with their target customers through social media, customers can find the goods and services they desire or need.
As an illustration, social networking platforms like enable companies to set up business fan pages, which they can use to post updates, images, locations, and rankings. Customers can submit reviews on the page in addition to rankings, which are visible to anyone who visits the page.
A company might utilize social networking sites because it is incredibly cost-effective, for example, if there aren't enough employees to administer the website at a particular time of day. These sites also offer advertising capabilities to promote your content and special offers and are less expensive. For example, there are several sites that allow you to reach individuals all over the world if you so choose.
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A premium pizza is comprised of exactly 40 ounces of toppings. The available toppings are listed below with their corresponding weight (in ounces). There can be multiple entries of each topping, as long as the total weight is equal to 40 ounces. [18 points] For example, a pizza can contain 1 topping of pepperoni, 2 toppings of sausage, 1 topping of bacon, and 2 toppings of onion:1∗4+2∗10+1∗6+2∗5=401∗4+2∗10+1∗6+2∗5=40(ounces) A pizza cannot contain 7 toppings of bacon:7 ∗6=42>40A pizza cannot contain only 3 toppings of sausage :3
*
10=30<40Define a rule pizza
(P,S,B,O,M)
to find out how many of each topping can be contained on a pizza, where arguments
P,S,B,O
, and
M
represent the weights (in ounces) of the Pepperoni, Sausage, Bacon, Onion, and Mushroom toppings, respectively. [14] 3.2 Use your pizza rule to find all possible outputs to the following question (goal). [2] I ?- pizza(1, S, 1, O, M). Put all answers of the question in a comment in the file. 3.3 Use your pizza rule to find all possible outputs to the following question (goal). [2] I ?- pizza(
P,S,B,O,1)
. Put all answers of the question in a comment in the file.
Exactly 40 ounces of ingredients make up a premium pizza. The toppings that are available are mentioned below with their associated weights (in ounces).
For illustration, a pizza toppings list might include two toppings of onion, one of bacon, two of sausage, and one of pepperoni.: 1*4 + 2*10 + 1*6 + 2*5 = 40 (ounces)
There cannot be seven bacon toppings on a pizza: 7 * 6 = 42 > 40
A pizza must have just three sausage toppings: 3*10 = 30 < 40
To determine the maximum number of each topping that can be placed on a pizza, define the rule pizza(P, S, B, O, M), where P, S, B, O, and M represent the weights in ounces of the toppings, respectively, of pepperoni, sausage, bacon, onion, and mushrooms.
pizza(P,S,B,O,M):-
member(P,[0,1,2,3,4,5,6,7,8,9,10]),
member(S,[0,1,2,3,4]),
member(B,[0,1,2,3,4,5,6]),
member(O,[0,1,2,3,4,5,6,7,8]),
member(M,[0,1,2,3,4,5]),
S is 4*P + 10*S + 6*B + 5*O + 7*M,
S =:= 40.
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