Answer: Your Answer Is In Steps
Explanation: To open a file in append mode without specifying a close function, you can use the following statement:
with open('my_list.txt', 'a') as file:
This statement opens the file 'my_list.txt' in append mode, meaning that any data written to the file will be added to the end of the file, rather than overwriting the existing contents. The file will be automatically closed when the block of code indented under the 'with' statement is finished executing.
To open a CSV file with a semicolon as the delimiter, you can use the following statement:
with open('myfile.csv', 'r') as file:
csv_data = csv.reader(file, delimiter=';')
This statement opens the file 'myfile.csv' in read mode and creates a CSV reader object using the csv module. The delimiter parameter is set to ';', so the CSV reader will use a semicolon as the delimiter when parsing the data. The file will be automatically closed when the block of code indented under the 'with' statement is finished executing.
list and explain 3 components of the operating systems
Answer:
An operating system (OS) is a type of software that manages the hardware and software resources of a computer. It is the foundation on which other programs, such as application software, are built.
There are three main components of an operating system:
The kernel: This is the central part of the operating system that manages the hardware and software resources of the computer. It is responsible for allocating memory, controlling the input/output devices, and managing the system's resources. The shell: This is the interface between the user and the kernel. The shell allows the user to interact with the operating system using commands and programs. System libraries: These are collections of reusable software routines that provide common services to application programs. They are often used for tasks such as input/output, math operations, and other common tasks.Together, these components form the core of an operating system, and they work together to provide the basic functionality that allows a computer to run.
Use elicitation techniques that you have learned during the course to
elicit requirements from us, the Stakeholders. You will be given the
following opportunities during the Weekly Q&A Sessions to elicit
requirements from us.
1. 11.01.2023: First 15 minutes of the Q&A Session.
2. 18.01.2023: First 15 minutes of the Q&A Session.
2. TIP: You can use the time until the above elicitation sessions to
prepare the various elicitation techniques that you would like to use.
3. Based on the requirements you have elicited from us based on our live
interactions, prepare a comprehensive requirements document
containing both textual and model-based requirements documentation.
The method to make a comprehensive requirements document containing both textual and model-based requirements documentation is given below.
How to elicit requirements from stakeholders?The broad instructions on how to obtain requirements from stakeholders are:
One strategy is to ask stakeholders about their requirements and expectations for the project using a range of elicitation approaches, such as surveys, focus groups, workshops, and interviews. These methods can be used to collect textual and model-based needs, such as constraints, non-functional requirements, and functional requirements (what the system should be able to perform) (limitations on the system).To make sure that all of the relevant stakeholders' requirements and concerns are taken into account, it is crucial to include them all in the elicitation process. In order to completely understand the needs, it's crucial to be direct and explicit in your inquiries and pay close attention to the replies.
Henceforth, it is crucial to precisely and concisely record the requirements in a thorough requirements document after they have been elicited. Textual and model-based requirements, as well as any pertinent diagrams or models that aid in conveying the requirements to the development team and other stakeholders, should all be included in this document.
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FILL IN THE BLANK the _____clustering method first quantizes the object space into a finite number of cells that form a structure and then performs clustering on the_____structure.
Grid clustering method first quantizes the object space into a finite number of cells that form a structure and then performs clustering on the Grid structure.
What is grid-based method?The instance space is partitioned into a grid structure in grid-based methods. Then, instead of utilizing distinct data points as the basic units for clustering, the grid's Cells are used. The processing time improvement is this method's main benefit. A statistical method for grouping data is known as model-based clustering. It is believed that the observed (multivariate) data was produced from a finite mixture of component models. A probability distribution, often a parametric multivariate distribution, makes up each component of a component model. The grid technique is a textual strategy for teaching multiplication to kids. Prior to multiplication, it entails dividing integers into tens and units.To learn more about grid refer to:
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You are an IT administrator for your company. you have been tasked with the assignment of installing 300 copies of Windows 10. You need to finish this task as quickly and efficiently as possible.
Which of the following booth methods would be the BEST methods for installing Windows under these circumstances?
The best techniques for installing Windows in this situation would be PXE booth techniques.
What is the name of the software that allows CMD to format hard drives?Diskpart, a program available in Windows, can be used from the command line to format a disk. Diskpart is a pre-installed tool in Windows.
Which of the following describes a method for keeping track of a drive's partitioning information?The two different techniques for partitioning hard drives are GPT and MBR. Each of them uses a different method to store the drive's partitioning information. The details include the beginning and end points of partitions. Your operating system is therefore aware of which sectors belong to each partition and which partition is capable of booting.
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Words used by a system that cannot be used for any other purpose are called _____ words. For example, in Oracle SQL, the word INITIAL cannot be used to name tables or columns.
reserved
unique
null
character
Words used by a system that cannot be used for any other purpose are called reserved words. For example, in Oracle SQL, the word INITIAL cannot be used to name tables or columns.
What is Oracle SQL?Accessing, defining, and maintaining data is made simple, elegant, and performant by Oracle SQL. Use SQL to connect to Oracle from PHP, Java, Python,.NET, Hadoop, Node.js, or APEX.
All programs and users access data in an Oracle database using a set of statements known as Structured Query Language (SQL). Without directly using SQL, users can frequently access databases through application programs and Oracle tools; however, when processing user requests, these applications must use SQL. The background knowledge on SQL that is common to most database systems is provided in this chapter.
Database users and administrators can complete their database tasks with Oracle SQL Developer's free graphical user interface and fewer clicks and keystrokes.
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In Java, write multiple if statements: If carYear is before 1967, print "Probably has few safety features." (without quotes). If after 1970, print "Probably has head rests.". If after 1991, print "Probably has electronic stability control.". If after 2002, print "Probably has airbags.". End each phrase with period and newline. Ex: carYear = 1995 prints:
Probably has head rests.
Probably has anti-lock brakes.
import java.util.Scanner;
public class SafetyFeatures {
public static void main (String [] args) {
int carYear;
Scanner input = new Scanner(System.in);
carYear = input.nextInt();
/* Your code goes here */
}
}
In programming, if statements are effectively utilized in order to make decisions they are also known as conditional statements. In Python, the syntax of an if statement is as follows:
if (condition) followed by the statement;What is the significance of multiple if statements?The significance of multiple if statements is to evaluate more than one condition and return different values depending on the results. you'd use an IF formula to test your condition and return one value if the condition is met, and another value if the condition is not met.
The multiple if statements written in Python are as follows:
if carYear < 1967:print("Probably has few safety features.\n")
if carYear > 1971:print("Probably has head rests.\n")
if carYear > 1992:print("Probably has anti-lock brakes.\n")
if carYear > 2002:print("Probably has tire-pressure monitor.\n")
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Why can organizations can legally set and enforce usage policies?
Organizations can legally set and enforce usage policies because they have the right to determine how their resources, such as computers and networks, are used. These policies help ensure that the organization's resources are used in a way that is consistent with the organization's goals and objectives, and that they are not used in a way that could harm the organization or its employees. Additionally, many organizations have a legal obligation to protect sensitive information and to ensure that their employees use the organization's resources in a responsible and ethical manner. By setting and enforcing usage policies, organizations can help meet these obligations and protect their interests.
What will be output by the following statements?double x = 1.23456789;cout << fixed;cout << setprecision(5) << x << endl;cout.precision(3);cout << x << endl;cout << x << endl;Can you show me the steps on how you got the output?
11.00 will be output by the following statements .
What is output in programming?
It's possible that a program needs to talk to a user. It might do this to display the program's results or to ask for more data so that it can function. This is referred to as output and is frequently displayed as text on the user's screen.
What do programming input and output mean?
A computer's communication with the outside world, which could include a human or another information processing system, is known as input and output, or I/O. Signals or data sent by the system are known as outputs, while those received by the system are known as inputs.
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Use R to solve the following problem. How would you write R code for the following.
1. Using the ClassifyRisk data set with predictors age, marital status, and income, and target variable risk, find the k-nearest neighbor for record #1, using k=2 and Euclidean distance.
R is a language and environment for statistical computing and graphics. This is a GNU project similar to his S language and environment developed at Bell Labs by John Chambers and his colleagues. R can be viewed as another implementation of S. R offers a wide variety of statistical and graphical techniques and is highly extensible.
How to write code in R?
important point
Each program begins with a description of its function.
Then load all the required packages.
Consider the current working directory when sourcing scripts.
Use comments to mark sections of code. Place the function definitions at the top of the file, or in separate files if there are many.
How to get help code in R?
In the RStudio IDE, clicking any function name and pressing F1 opens the help text for the associated function directly in the pane.
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1. For the following code:
int myFunction(int n) {
int x = n * 2;
int y = (x + 1) % 3;
return y - x;
What does myFunction(4) evaluate to?
The answer should be [tex]-8[/tex].
In most programming languages, lines of code are read from the top to the bottom of the file. Let's start by analyzing this function from top to bottom.
In the first line we see a function definition and we can see that it has one parameter. This parameter is called [tex]n[/tex] and is a variable that can store integers.
int myFunction(int n)We are told in the question that the integer number [tex]4[/tex] should be assigned to this parameter.
myFunction(4)Therefore, in this code block, we can place the integer [tex]4[/tex] wherever we see the parameter [tex]n[/tex].
In the next step, we are greeted by a variable [tex]x[/tex] and some arithmetic operations appear.
int x = n * 2;int x = 4 * 2;int x = 8;We will do the same steps for our next variable, [tex]y[/tex]. In this question, the % operator is a sign that returns us the remainder from the quotient.
int y = (x+1) % 3;int y = (8+1) % 3;int y = 9 % 3;int y = 0;In the last step, we will calculate the value that the function will return, which depends on the value of two variables. Since we know the value of these two variables, we can finish analyzing the question by substituting them.
return y - x;return 0 - 8;return -8;is typically the longest and most expensive phase of the sdlc. group of answer choices planning design analysis implementation
The phase of the systems development life cycle known as "implementation" is the most time-consuming and expensive (SDLC).
What stage of system development is the most crucial?The requirement gathering and analysis phase of the SDLC is, according to many software development professionals, the most crucial step. The project team starts to grasp the expectations of the project's stakeholders at this point.
In the SDLC, which step is the most expensive?Testing and planning phases, which can take anywhere from a month to several years, are the most expensive components of this type of software development. It rarely lasts longer than three years, though.
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Using for loop,write a program that accepts a series of genders from a class of 10 students and count the number of female and male students in the class(c++ programming)
Output:in the file
#include <iostream>
#include <algorithm>
#include <vector>
#include <cctype>
int main(int argc, char* argv[]) {
//Creating a vector. It's also dynamic array.
std::vector<char> genders;
//Input section using loop.
for(int i=0; i<10; i++) {
//Point. If the user entered the wrong letter and something else, start from here.
wrong_input:
//Variable that store the gender letter.
char gender;
//Ask the user.
std::cout << "Enter gender of student " << i+1 << " <F/M>: "; std::cin >> gender;
//Check if something went wrong. Basic Exception handling.
if(tolower(gender) == 'f' || tolower(gender) == 'm') {
//Send data into vector.
genders.push_back(tolower(gender));
} else {
std::cout << "Something went wrong. Try again for student " << i+1 << std::endl;
goto wrong_input;
}
}
//Inform the user.
std::cout << "\nThe number of female students are " << std::count(genders.begin(), genders.end(), 'f') << "\nThe number of male students are " << std::count(genders.begin(), genders.end(), 'm') << std::endl;
return 0;
}
Examine the following circumstances as a network analyst and analyze in which of the following conditions MANs (metropolitan area networks) cannot be useful.
c. Connecting a home office with its branch offices and a warehouse. A Metropolitan Area Network (MAN) is a network that connects a specific metropolitan area, such as a city or a town.
A Metropolitan Area Network (MAN) is typically covers a larger geographical area than a local area network (LAN), but is smaller than a wide area network (WAN). MANs are used to connect a variety of devices and networks within a city or metropolitan area, including computers, servers, routers, switches, and other networking equipment.
In the circumstances described in the other options, a MAN could be useful for connecting the various locations and devices:
Connecting a city's police stations.
Connecting a hospital with its regional medical centers.
Connecting a clothing manufacturer to sell its products to consumers worldwide.
The missing part in the question is shown below.
Examine the following circumstances as a network analyst and analyze in which of the following conditions MANs (Metropolitan Area Networks) cannot be useful. (Choose One)
a Connecting a city’s police stations
b Connecting a hospital with its regional medical centers
c Connecting a home office with its branch offices and a warehouse
d Connecting a clothing manufacturer to sell -its products to consumers worldwide. choose one answe
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at the end of which of the following code segments is the value of sum the same as the value of sum at the end of the preceding code segment?
sum ←← 0
z ←← x * y
REPEAT z TIMES
{
sum ←← sum + 1
}
sum ←← 0
REPEAT y TIMES
{
REPEAT x TIMES
{
sum ←← sum + 1
}
}
Which of the following best illustrates how items are compared in pairs?As the code segment loops over myList, it compares each entry to each element after it.
The code segment prints what?The goal of the code segment is to output a value that is 1 greater than n's value twice. System. out. print(result); .
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Create Table EXAMS ( SUB_NO integer Not Null, STUDENT_NO integer Not Null, MARK decimal (3), DATE_TAKEN date Not Null, Primary Key (SUB_NO, STUDENT_NO, DATE_TAKEN));
The above SQL statement is used to create the EXAMS table. Considering the EXAMS table; which of the following table contents can't be inserted to the EXAMS table (assume date format is correct)?
a. alter table exams add student no as foreign key (exams); b. alter table exams add foreign key (student no) references students; c. alter table sub no add foreign key (exams); d. alter table exams foreign key (sub no);
The table content can't be inserted to the EXAMS table (assume date format is correct) is alter table exams add student no as foreign key (exams);. The correct option is a.
What is a SQL?A database can be communicated using SQL. It is the accepted language for relational database management systems, claims ANSI (American National Standards Institute).
To change data on a database or to obtain data from a database, SQL statements are employed. A high-performance language called SQL is used to interact with databases.
Therefore, the correct option is a. alter table exams and add student no as a foreign key (exams);.
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which of the following terms describes a network device that is exposed to attacks and has been hardened against those attacks?a. multi-homedb. kernel proxyc. bastion sacrificial hostd. circuit proxy
Host used as a bastion or sacrifice Unfirewalled hosts, sometimes known as bastions or sacrifice hosts, are unprotected. Any object protected from assault is referred to as a bastion host. A device deliberately left open to assault, like a honeypot, could serve as a sacrifice host.
Which of the following best defines a network device that is vulnerable to assaults and has been hardened against those attacks?Unfirewalled hosts are referred to as bastions or sacrifice hosts. Any object protected from assault is referred to as a bastion host.
Which of the three access control kinds are they?Role-based access control (RBAC), mandatory access control, and discretionary access control are the three basic categories of access control systems (MAC).
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how to solve
write a function fact that takes an integer as a parameter and returns the factorial of that number in c program
Answer:
#include <stdio.h>
// Function prototype
int fact(int num);
int main() {
int num = 5;
printf("The factorial of %d is %d\n", num, fact(num));
return 0;
}
// Function definition
int fact(int num) {
int result = 1;
for (int i = 1; i <= num; i++) {
result *= i;
}
return result;
}
Explanation:
The fact() function takes an integer as a parameter and calculates the factorial of that number by using a for loop to multiply the numbers from 1 to the given number. It then returns the result of the calculation.
In this example, the main() function calls the fact() function and passes the value 5 as an argument. The fact() function calculates the factorial of 5 and returns the result, which is then printed to the console by the main() function.
Which of the following components requires special disposal procedures to comply with environmental guidelines?
a. Faceplate
b. Notebook battery
c. DDR3 doubles the data transfer rate of DDR2; DDR3 uses less power than DDR2
d. Install an add-on RAID controller
Answer:
Explanation:
card
B. Notebook battery
identify the method used to find the number of strings of four lowercase letters that have the letter x in them.
The number of four-character strings with x in them, then, is equal to 66351.A set of characters, including spaces, is called a string.
We may describe it as a single-dimensional array of letters that is ended by the character '0', which stands for NULL. A string may also be thought of as a predetermined class, and most programming languages, including C, C++, Java, PHP, Erlang, Haskell, Lisp, etc., support predefined classes.
Number of four-character sequences that might contain x = [tex]26^{4}[/tex]=456976
Number of four-character sequences without the character x =[tex]25^{4}[/tex]=390625
The number of four-character strings with x in them, then, is equal to 66351.
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to test an action query before running the query, it is a good practice to create a query first to make sure the correct records are selected.
A set of instructions for working with data is called a query. To carry out these instructions, you run a query. As well as returning outcomes — which can be arranged, gathered, or sifted — a question can likewise make, duplicate, erase, or change information.
The most fundamental reason for a query's poor performance is that it processes too much data. Some queries simply require extensive data shifting and cannot be avoided. But that's unusual; Changes can be made to most bad queries to access less data. The two-step process of analyzing a poorly performing query has proven useful to us:
Check to see if your application is obtaining more data than necessary. In most cases, this indicates that it is accessing too many rows, but it could also be accessing too many columns. Determine if the MySQL server is analyzing more rows than necessary. Action queries come in four varieties: make-table queries, append queries, delete queries, update queries, and so on. Action queries modify the data in the tables they are based on, with the exception of make-table queries, which create new tables. If you make changes with an action query that you later decide you didn't want to make, you will typically need to restore the data from a backup copy because these changes cannot be easily undone, such as by pressing CTRL+Z. Before running an action query, you should always ensure that you have a fresh backup of the underlying data.
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a decision that faithfully reflects the concerns and interests of affected parties fulfills which of the following dimensions of quality with respect to decision making? group of answer choices justice due process fairness coherence accuracy
Answer:
Explanation:
Justice, fairness, and due process.
assume that three jobs arrive at approximately the same time (arrival time are all 0), but job a arrives slightly before job b, and job b arrives slightly before job c (if the jobs must be selected in order, the order should be a->b->c). job a requires 3 sec of cpu, job b is 5 secs, and job c is 4 secs. assume a time-slice of 1 second.
To calculate Response time, R.T = Time(at which the process get the cpu for 1st time) - Arrival Time(A.T)
Average Response time =(0+1+2 )/3 = 1second.
Turnaround Time, T.T = Exit time - A.T(Arrival Time) ,So for the SJF, T.T for B = (12-0) = 12 sec.
so, for FIFO, T.T for B = 8 seconds = (8-0) seconds.
What is Shortest Job First in cpu scheduling?
A scheduling strategy known as "shortest task first" chooses the process with the shortest execution time to run next. Preemptive or non-preemptive ordering is both possible for shortest job first.
Shortest job first is thought to be the best practice due of its simplicity. It also cuts down on the typical amount of time that other operations take to execute.
The terms shortest job first (SJF), shortest job next (SJN), and shortest process next are frequently used (SPN).
There are also some drawbacks to the shorter tasks being completed first. One effect of having several shorter processes is that it may result in process starvation for longer jobs.
Another is the need to be aware of each process's approx. anticipated execution time. This is frequently so difficult in so many system or cases.
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In database recovery, the transaction log shows before and after images of records that has been modified by transactions. Yes No
As per the given statement in the question in database recovery, the transaction logs show before and after images of records that have been modified by transactions. The answer is true.
What is a database?A database is a group of data that is electronically accessible and stored in computing. Small data can be kept on such a file system, whereas large databases are kept in data centers or the cloud.
Database design encompasses both formal methodologies and pragmatic factors, such as data modelings, effective data presentation and storage, scripting languages, privacy and security of sensitive data, and cloud control issues, such as concurrent access support and fault tolerance.
Therefore, the given statement is true.
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A _____ distributed database system will support different database management systems (DBMS) that may even support different models running under different computer systems.
fully heterogeneous
fully homogeneous
homogeneous
heterogeneous
A fully heterogeneous distributed database system will support different database management systems (DBMS) that may even support different models running under different computer systems.
What is DBMS?A database management system (DBMS) is a piece of software used to store and retrieve user data while taking necessary security precautions. It is made up of several programs that manipulate the database.
When an application requests data, the DBMS accepts the request and tells the operating system to give the requested data. A DBMS facilitates the storage and retrieval of data for users and other third-party software in complex systems.
Users can design their own databases using DBMS, depending on their needs. The term "DBMS" refers to both the application programs and the database user. Between the data and the software application, it offers an interface.
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Consider the following code segments, which are each intended to convert grades from a 100-point scale to a 4.0-point scale and print the result. A grade of 90 or above should yield a 4.0, a grade of 80 to 89 should yield a 3.0, a grade of 70 to 79 should yield a 2.0, and any grade lower than 70 should yield a 0.0.
Assume that grade is an int variable that has been properly declared and initialized.
Code Segment I
double points = 0.0;
if (grade > 89)
{points += 4.0;}
else if (grade > 79)
{points += 3.0;}
else if (grade > 69)
{points += 2.0;}
else
{points += 0.0;}
System.out.println(points);
Code Segment II
double points = 0.0;
if (grade > 89)
{points += 4.0;}
if (grade > 79)
{grade += 3.0;}
if (grade > 69)
{points += 2.0;}
if (grade < 70)
{points += 0.0;}
System.out.println(points);
Which of the following statements correctly compares the values printed by the two methods?
Answer:
The values printed by the two code segments will be the same.
Both code segments use a series of if statements to assign a value to the variable "points" based on the value of the variable "grade". In Code Segment I, the if statements are structured such that only the first one that evaluates to true will execute, and the value of "points" will be set accordingly. In Code Segment II, all of the if statements will execute, and the value of "points" will be the sum of all of the values that were added.
For example, if "grade" is 85, both code segments will execute the second if statement and add 3.0 to "points". Therefore, both code segments will print the same value in this case.
If you wanted to compare the values printed by the two code segments, you could test them using a variety of different values for "grade" and see if the output is consistent.
Explanation:
lisa works as a system analyst for a small company. she is doing testing of a few applications in her system, and hence created a lot of restore points as a measure of backup. she observes that these restore points have taken up a large amount of her disk space and are making her system slow. which of the following utilities will you use to resolve this problem?
Perform regular system backups.
You work as a system administrator for a large of the organization. Some employees report to you that their system crashed and is unable to boot. Although you have recovered their systems, you are want to take proactive measures to plan the recovery of the systems by the before any further failure occurs. Which of the following preparations can you take to meet your goal-
- Keep your computer up-to-date with Windows Update.
- Use current software to scan for any malware and ensure having the most recent updates.
- Perform regular system backups.
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Which of the following functions enables you to calculate the average number of on-site visits made by a particular sales representative
Answer:
Explanation:
Which of the following functions enables you to calculate the average number of on-site visits made by a particular sales representative
The function that enables you to calculate the average number of on-site visits made by a particular sales representative is AVERAGEIF. Therefore, the correct option is A.
What is AVERAGEIF function?The AVERAGEIF function calculates the average of the values of the range that meets the supplied criteria.
=AVERAGEIF(range, criteria, [average_range])
Where,
Range: The range of cells to be evaluated by the criteria.
Criteria: The condition or criterion that cells must meet to be included in the calculation of the average. This can be a number, text, logical expression, or a cell reference to a single cell containing any of these.
[average_range]: (Optional) The range of cells to be used in the calculation of the average. If, the range argument is used.
Hence, to calculate average AVERAGEIF is used. Therefore, the correct option is A.
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The question is incomplete, but most probably the complete question is,
Which of the following functions enables you to calculate the average number of on-site visits made by a particular sales representative:
A. AVERAGEIF
B. COUNTIF
C. AVEDEV
D. TEXTJOIN
17. build a phone-book utility that allows you to access and modify an alphabetical list of names, addresses and telephone numbers. use utilities such as awk and sed, to maintain and edit the file of phone-book information. please use pseudo names and numbers (maintain privacy) in the phone book. the phone-book needs to have at least 20 entries. 18. must incorporate use of functions and pointers
To build a phone-book utility that allows you to access and modify an alphabetical list of names, addresses and telephone numbers, check the code given below.
What is telephone numbers?A telephone number is a set of digits that is assigned to a landline telephone subscriber station that is connected to a phone line, to a wireless electronic telephony device, such as a radio telephone or a mobile telephone, or to other devices in order to transmit data over the public switched telephone network (PSTN) or other public and private networks.
When switching calls, a telephone number serves as an address using a system of destination code routing. On the calling party's originating phone set, the calling party enters or dials a telephone number, and the originating phone set sends the entered or dialled numbers as a signal to a phone exchange. The exchange concludes the call by connecting it to the called party over the PSTN or to a different subscriber who is locally connected.
//CODE//
#!/bin/sh
#this particular script can be used for entry purpose
echo -n "Enter the name of the person: "
read name
echo -n "Provide the address of respective person: "
read address
echo -n "Provide the phone number of respective person: "
read telephone_number
echo "$name ;
$address ;
$telephone_number" >>book.txt
#book.txt:- {{provide the address of text file where you want to store the info
}
}
or it will create one in the current directory
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what is the origin of cellular phones
Answer:
The first handheld mobile phone was demonstrated by Martin Cooper of Motorola in New York City in 1973, using a handset weighing c. 2 kilograms (4.4 lbs).[2] In 1979, Nippon Telegraph and Telephone (NTT) launched the world's first cellular network in Japan.
Explanation:
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Database administrators have created a database used by a web application. However, testing shows that the application is taking a significant amount of time accessing data within the database. Which of the following actions is MOST likely to improve the overall performance of a database?
A. Normalization
B. Client-side input validation
C. Server-side input validation
D. Obfuscation
A. Normalization. Normalization is a process used to organize a database in a way that reduces redundancy and dependency.
Normalization is a common technique used to improve the performance of a database by reducing the amount of data that needs to be accessed and processed. By organizing the data in a more efficient manner, normalization can help to improve the overall performance of a database, particularly when it is accessed frequently or by multiple users.
Client-side input validation and server-side input validation are both techniques used to validate user input and ensure that it is in the correct format. While these techniques can help to improve the security and reliability of a database, they are not directly related to performance and are not likely to have a significant impact on overall performance.
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