The NUCLEO-F401RE is a development board produced by STMicroelectronics. It is based on the ARM Cortex-M4 microcontroller, and it is designed to be used for evaluation and development purposes.
What project can done with NUCLEO-F401RE ?Here are a few project ideas that you could try using the NUCLEO-F401RE development board and the C programming language :
Temperature monitor: You could use the NUCLEO-F401RE board and a temperature sensor to create a device that can measure the temperature in a room or outdoor environment.GPS tracker: The C code would be used to control the GPS module, read the location data, and display the current position on a map or display. Music player: You could use the NUCLEO-F401RE board and a speaker to create a simple music player that can play MP3 or WAV files stored on a microSD card. Simple game: You could use the NUCLEO-F401RE board and an LCD screen to create a simple game, such as a maze or puzzle, that can be played using the board's buttons or a joystick.To learn more about microcontroller refer :
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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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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.
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:
i hope help you :)
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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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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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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.
which of the following scheduling algorithms will tend to schedule i/o bound jobs before cpu bound jobs?
I/O-bound processes are often given priority over CPU-bound processes under FCFS scheduling scheme.
What method is most appropriate for IO-bound processes?SRTF favors processes that are I/O-bound. LRTF favors processes that are CPU-bound. Reason: CPU-bound large CPU burst operations are prioritized higher.FCFS often penalizes I/O-bound operations and short processes. Processes that are CPU bound are preferred over I/O bound processes because they run completely.The complete phrase for FCFS is First Come First Serve. The easiest and simplest CPU scheduling algorithm is this one. The process that asks the CPU receives the CPU allocation first in this kind of procedure. A FIFO queue can be used to manage this scheduling technique.I/O-bound processes are often given priority over CPU-bound processes under FCFS scheduling scheme.To learn more about I/O-bound refer to:
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Under the FCFS scheduling mechanism, I/O-bound processes frequently have precedence over CPU-bound ones.
Which approach is ideal for IO-bound processes?Processes that are I/O-bound are preferred by SRTF. Processes that are CPU-bound are preferred by LRTF. Reason: Large CPU burst actions that are CPU-bound are given higher priority.
I/O-bound operations and brief processes are frequently penalized by FCFS. The fact that CPU-bound processes execute entirely makes them preferable to I/O-bound ones.
First Come First Serve is the full form of FCFS. This is the simplest and most straightforward CPU scheduling algorithm. In this type of method, the process that requests the CPU gets it first. This scheduling method may be controlled using a FIFO queue.
Under the FCFS scheduling mechanism, I/O-bound processes frequently have precedence over CPU-bound ones.
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Q Which of the following Algorithm favour CPU bound Bound process ?
1) RR 2) FCFS 3) Multilevel feedback queue
option are : a) 1 only
b) 2 only
c) 1 and 2 only
d) 1 and 3 only
carolhas created a subnet of 10.20.30.0/27. which of the following is the address that is used for broadcast messages within the subnet?
For broadcast messages within the subnet, use the IP 10.20.30.31.
A host with the IP address 172.16.66.21 belongs to what subnetwork?Every subnet has two hosts. A host with the IP address 172.16.66.0/21 is located in subnetwork. the broadcast address of the subnet 64 is 71.255 since is 72.0.
The cloud's method for allocating private IP addresses?Method of allocating. According to the address range of the virtual network subnet where the resource is located, Azure assigns private IP addresses to resources. For each subnet address range, Azure reserves the top four addresses. Resource assignments cannot be made using the addresses.
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a children's book editor is writing code to detect words that are too large for the target reading level. their program processes the word lists from the sentences in the book, and creates a new list with words that are too large, i.e. more than 5 letters. How to do it ?
Sequencing, selection, and iteration are the three fundamental components of an algorithm. An algorithm is a series of processes, and the right sequencing of these phases is essential to ensuring that the algorithm works as intended.
What kind of assistance may distributed computing provide?Through the use of hundreds or thousands of computers operating simultaneously, distributed computing may enhance the performance of numerous solutions. By dividing the time required for the sequential solution by the time required for the distributed parallel solution, or "speedup, " we may determine the benefits.Sequencing, selection, and iteration are the three fundamental components of an algorithm. An algorithm is a series of processes, and the right sequencing of these phases is essential to ensuring that the algorithm works as intended. See what results by attempting those steps in various successions.To learn more about algorithm refer to:
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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.
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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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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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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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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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;
}
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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A colleague mentions using a client VPN. Which of the following protocols or technologies would you expect your colleague to have used?
a. SSL
b. IPsec
c. GRE
d. DMVPN
A coworker brings up using a client VPN. The below protocols or technologies would you anticipate your coworker using SSL.
What are the protocols of technology?An established set of guidelines that govern how data is transferred between various devices connected to the same network is known as a network protocol. In essence, it enables interconnected devices to interact with one another despite any variations in their internal workings, organizational structures, or aesthetics.
What kinds of protocols are examples?Basic data communication technologies like TCP/IP and HTTP are examples of communication protocols. Through protocols like ICMP and SNMP, management protocols upkeep and control the network. HTTPS, SFTP, and SSL are security protocols.
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Velma receives an email from a stranger who claims he will be receiving a large inheritance soon and will share it with her in exchange for a loan to help him escape his current financial difficulties. He requests that Velma allow him to pay his creditors from her bank account. Velma deletes the email because she recognizes that it represents _____.
Velma deletes the email because she recognizes that it represents advance fee fraud.
What is a bank account?You can deposit and withdraw money from a bank account, make payments, send money to another person or organization, pay bills online, and more.
An account in banking is an arrangement whereby a company, often a financial institution like a bank or credit union, takes a customer's financial assets and retains them on the customer's behalf according to the customer's discretion.
Therefore, since Velma is aware that the email contains advance fee fraud, she deletes it.
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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
private string name; /* missing constructor */ } the statement below, which is located in a method in a different class, creates a new person object
The following can be used to replace / missing constructor / so that the object p is correctly created:
public Person(String n)
{
name = n;
}
What is a string?A string is a type of data used in programming that is similar to integers and floating point numbers, but it represents text rather than numerical values. It is made up of a string of characters, which can also include spaces and numbers.
As an illustration, the words "hamburger" and "I ate 3 hamburgers" are both strings. If properly specified, even "12345" could be regarded as a string. To make sure that a string is recognized as a string and not a number or variable name, programmers typically have to enclose strings in quotation marks.
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11-12 sid davidson is the personnel director of babson and willcount, a company that specializes in consulting and research. one of the training programs that sid is considering for the middle-level managers of babson and willcount is leadership training. sid has listed a number of activities that must be completed before a training program of this nature could be conducted. the activities and immediate predecessors appear in the following table:
Explanation:
when 11 times a certain integer is subtracted from twice the square of the integer ,the result is 21 what is the integer
FILL IN THE BLANK The _____stage of information technology planning outlines business processes that are central to achieving strategic goals and helps determine which ones could most benefit from information technology.
The business area analysis stage of information technology planning outlines business processes that are central to achieving strategic goals and helps determine which ones could most benefit from information technology.
What is Information Technology?
Utilizing hardware, software, services, and supporting infrastructure to manage and transmit information utilizing speech, data, and video is known as information technology. Data storage, retrieval, transmission, and sending are all part of the field of information technology, or IT.
The phrase "IT" is frequently used as a shorthand for computers and the networks that connect them, but it also refers to other means of information dissemination, such as television and mobile devices.
IT, or information technology, is the term used to describe the use of technology to an organization's business difficulties or to expedite and manage business processes.
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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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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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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 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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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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which of the following will meet the needs of an organization who wants to control the construction and delivery of all cloud-based services? a. Public cloud
b. Hybrid cloud
c. Private cloud
d. Community cloud
The following factors should be taken into account when creating a successful enterprise hybrid cloud strategy in order to reduce risks and choose between private, public, and hybrid cloud options:
Protection and control Is physical access to the platforms and infrastructure that are utilized to supply workloads important? Are there any security and compliance standards that clients must adhere to.Flexibility and agility.Which cloud option will provide enough resources to suit the needs of developers and businesses?Which cloud infrastructure can effectively serve users during periods of high demand or peak usage? Management of application complexity.Security and control, application complexity management, and operating cost reduction are frequently non-negotiable in large enterprises.To know more about hybrid cloud click on the below link:
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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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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