MTBF is a measurement of

A) the speed at which a storage device can read and write data
B) the number of digits used to store a computer file
C) the average length of a time a storage device can reliably hold data without it beginning to degrade
D) the average length of time between failures on a device

Answers

Answer 1

MTBF is a measurement of the average length of time between failures on a device. Thus, the correct option for this question is D.

What is MTBF in computers?

MTBF stands for Mean time between failures. It is often utilized in order to measure the overall failure rates, for both repairable and replaceable/non-repairable products.

It governs the simplest equation for mean time between failure. It is as follows:

MTBF = total operational uptime between failures/number of failures.

It is the predicted elapsed time between inherent failures of a mechanical or electronic system during the normal functioning of the computer system in order to detect an error.

Therefore, MTBF is a measurement of the average length of time between failures on a device. Thus, the correct option for this question is D.

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Related Questions

Use routers, Switches and Hubs to design a simple network for Maendeleo Institute of Technology having 240 employees. The Institute has five departments: Computer Science has 100 employees, Information Technology 60 employees, Accounts 40 employees, Human Resource has 20 employees and Marketing has 20 employees.

Required:

• Network topology showing five network that corresponds to five departments.

• Use Class C IP addresses (example 192.168.10.0/24) to show the subnet ID and broadcast ID of each department, the IP address must not overlap

• Consider Scalability

• Give reasons for your choice/ decisions

Answers

Answer:

To design a simple network for Maendeleo Institute of Technology with 240 employees, we could use a combination of routers, switches, and hubs.

Our network would consist of five separate networks, one for each department at the institute. We would use class C IP addresses, with a subnet mask of /24, to create the following subnets:

Computer Science department: 192.168.10.0/24

Information Technology department: 192.168.11.0/24

Account department: 192.168.12.0/24

Human Resource department: 192.168.13.0/24

Marketing department: 192.168.14.0/24

Each department would be connected to the network via a switch, which would allow for communication within the department and with other departments as needed. A router would be used to connect the individual department networks to the wider internet, and would also serve as a firewall to protect the network from external threats.

We would also include a hub in the network to allow for communication between devices within a department, as well as to provide additional connectivity and scalability.

Overall, our network design would provide each department with its own separate network, with the ability to communicate with other departments as needed. It would also be scalable, allowing for the addition of new devices and departments as the institute grows. The use of class C IP addresses and a /24 subnet mask would ensure that IP addresses do not overlap, ensuring efficient and reliable communication within the network.

Type the program's output states = ['CA', 'NY', 'TX', 'FL', 'MA'] for (position, state) in enumerate(states): print(state, position)

Answers

Answer:

states = ['CA', 'NY', 'TX', 'FL', 'MA']

for (position, state) in enumerate(states):

   print(state, position)

Output:

CA 0

NY 1

TX 2

FL 3

MA 4

In the acronym, MS-DOS, DOS stands for which option?

Digital Operating System
Disk Operating System
Dynamic Operating System
Distributed Operating System

Answers

Answer:

Disk Operating System

Explanation:


3. Describe how homes and businesses use networks.

Answers

Homes and Businesses use networks because it can help you better to find customers and staff and suppliers and business partners. Homes and Businesses also use network when it comes to conferences and you can also communicate through apps using the network.
There are many ways that homes and businesses use networks. Here are a few examples:

1. Home networks: Many homes have a local area network (LAN) that connects all of the devices in the home, such as computers, printers, and smartphones. This allows people to share resources, such as files, printers, and internet access.
2. Business networks: Businesses often have a more complex network setup, with a LAN that connects all of the devices in the office, as well as a wider area network (WAN) that connects multiple offices in different locations. This allows employees to share resources and communicate with each other, no matter where they are located.
3. The Internet: Both homes and businesses use the internet to connect to the rest of the world. This allows them to access a wide range of information and services, as well as communicate with people all over the globe.
4. Cloud computing: Many businesses and even some homes are using cloud computing, which allows them to store and access data and applications over the internet, rather than on a local server or computer. This can be more convenient and cost-effective, as it reduces the need for expensive hardware and IT staff.
5. Internet of Things (IoT): Both homes and businesses are using networks to connect a variety of devices that make up the Internet of Things (IoT). This includes things like smart thermostats, security cameras, and appliances that can be controlled and monitored over the internet.

Describe your academic and career plans and any special interests (e.g., undergraduate research, academic interests, leadership opportunities, etc.) that you are eager to pursue as an undergraduate at Indiana University. If you encountered any unusual circumstances, challenges, or obstacles in completing your education, share those experiences and how you overcame them.

Answers

Answer:

My academic and career plans are to pursue an undergraduate degree in business and minor in accounting. I am particularly interested in the finance, marketing, and management fields. After graduating, I plan to go on to pursue a Master's degree in Business Administration.

I am eager to pursue leadership opportunities at Indiana University, and would like to become involved in the student government. I am also interested in participating in undergraduate research, and exploring the possibilities of internships or other professional development experiences. Finally, I am looking forward to getting involved in extracurricular activities, such as clubs and organizations, to gain a better understanding of the business field and to network with other students and professionals.

Throughout my educational journey, I have had to overcome a few obstacles that have been made more difficult due to the pandemic. I have had to adjust to a virtual learning environment and find new ways to stay engaged in my classes. Additionally, I have had to learn how to manage my time more efficiently, which has been challenging due to the fact that I am also working part-time. Despite these difficulties, I have been able to stay motivated by setting goals and prioritizing my work. With determination and perseverance, I am confident that I can achieve my academic and career goals.

Write an expression that will cause the following code to print "greater than 20" if the value of user_age is greater than 20.

Answers

Answer:

if user_age > 20:

   print("greater than 20")

Explanation:

Name the function used to create a data frame ?

Answers

Answer:

The function used to create a data frame is data. frame()

Grayson is creating a program to keep track of how much money he earns and spends each week.he earns and spends each week. He wants to know if he has enough for ice cream? What data should he use to store his answer

Answers

Since Grayson uses a program that allows him to keep track of how much money he earns and spends each week. The type of data that will be used to give him the answer to the question is option A: "Boolean".

What is the program  about?

A Boolean variable can hold only two values: true or false.

He can use a conditional statement to check if the amount of money he has left over after subtracting his expenses from his earnings is greater than or equal to the cost of the ice cream. If it is, he can set the Boolean variable to "True", indicating that he has enough money for ice cream. If it is not, he can set the Boolean variable to "False", indicating that he does not have enough money.

Therefore, Grayson can compare the value of his remaining money to the cost of the ice cream, if the remaining money is greater than or equal to $4, he can set the Boolean variable to "True" which means he has enough money.

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See full question below

Grayson uses a program that allows him to keep track of how much money he earns and spends each week. Which type of data will be used to give him the answer to the following question?

"Do I have $4 to buy ice cream?"

Boolean

Images

Numbers

Text

Match each characteristic to its operating system.

[A] This system can be ported to more computer platforms than any of its counterparts.
[B] The operating system functions require many system resources.
[C] The operating system works only with specific hardware.

[1] Microsoft Windows Operating System
[2] Linux Operating System
[3] Apple Operating System

Answers

Answer:

[A] This system can be ported to more computer platforms than any of its counterparts. - [2] Linux Operating System

[B] The operating system functions require many system resources. - [1] Microsoft Windows Operating System

[C] The operating system works only with specific hardware. - [3] Apple Operating System

Here, we investigate what happens when we change the value of a variable in a function. Your instructions are to
define a function that takes a single argument, adds 10 to that argument, and then prints it out (all inside the function!)
then, outside of the function, print out x, call your function using x as its argument, and print out x again
In total, x should be printed out 3 times. Did you get what you expected?
Lab: Foreshadowing References
1 # define your function here Nm
2
3
4 x = 10 non
5
6 # print out the value of x
7
8 # call your function on x
9
10 # print out the value of x

Answers

Answer:

Observation:

The value of x remains the same in the main function

The value of x is incremented by 10 in the defined function

The program is as follows:

def Nm(x):

   x += 10

   print(x)

x = int(input("x: "))

print(x)

Nm(x)

print(x)

Explanation:

The explanation is as follows:

This defines the function

def Nm(x):

This increments x by 10

   x += 10

This prints x (the first print statement)

   print(x)

The main begins here; This gets input for x

x = int(input("x: "))

This prints x (the second print statement)

print(x)

This calls the function

Nm(x)

This prints x (the third print statement)

print(x)

Assume that x = 5;

The first print statement (in the function) prints 15 i.e. 5 + 10 = 15

The second and third print statements (in the main function) prints 5, the exact value of x

If you have a PC, identify some situations in which you can take advantage of its multitasking capabilities.

Answers

Situation one: using multiple monitors for tutorials on one screen and an application on another

Situation two: using virtual desktops for separating school and personal applications

A table student consists of 5 rows and 7 columns. Later on 3 new attributes are added and 2 tuples are deleted. After some time 5 new students are added. What will be the degree and cardinality of the table?​

Answers

Answer:

The degree of a table refers to the number of attributes (columns) it has. In the case you described, after the 3 new attributes are added, the degree of the table would be 7 + 3 = 10.

The cardinality of a table refers to the number of rows (tuples) it has. In the case you described, after 2 tuples are deleted, the cardinality of the table would be 5 - 2 = 3. After 5 new students are added, the cardinality would increase to 3 + 5 = 8.

use router,switches and Hubs to design a simple network for maendeleo institute of Technology having 240 employees.The institute have five department: computer science has 100 employees ,information technology 60 employees ,Account 40 employees ,Human resource has 20 employees and marketing has 20 employees . Require: .network topology showing five network that corresponding to five department .use class C IP addresses (example 192.168.10.0/24) to show subnet ID and broadcast ID of each department , the IP address must not overlap .consider scalability .Give reason for your choice /decision​

Answers

Answer:

To design a simple network for Maendeleo Institute of Technology with 240 employees, we could use a combination of routers, switches, and hubs.

Our network would consist of five separate networks, one for each department at the institute. We would use class C IP addresses, with a subnet mask of /24, to create the following subnets:

Computer Science department: 192.168.10.0/24

Information Technology department: 192.168.11.0/24

Account department: 192.168.12.0/24

Human Resource department: 192.168.13.0/24

Marketing department: 192.168.14.0/24

Each department would be connected to the network via a switch, which would allow for communication within the department and with other departments as needed. A router would be used to connect the individual department networks to the wider internet, and would also serve as a firewall to protect the network from external threats.

We would also include a hub in the network to allow for communication between devices within a department, as well as to provide additional connectivity and scalability.

Overall, our network design would provide each department with its own separate network, with the ability to communicate with other departments as needed. It would also be scalable, allowing for the addition of new devices and departments as the institute grows. The use of class C IP addresses and a /24 subnet mask would ensure that IP addresses do not overlap, ensuring efficient and reliable communication within the network.

Which color workspace contains colors outside the range of human vision?

Answers

Answer:

red i believe

Explanation:

How did the case Cubby v. CompuServe affect hosted digital content and the contracts that surround it?

Answers

Although CompuServe did post libellous content on its forums, the court determined that CompuServe was just a distributor of the content and not its publisher. As a distributor, CompuServe could only be held accountable for defamation if it had actual knowledge of the content's offensive character.

What is CompuServe ?

As the first significant commercial online service provider and "the oldest of the Big Three information services," CompuServe was an American company. It dominated the industry in the 1980s and continued to exert significant impact into the mid-1990s.

CompuServe serves a crucial function as a member of the AOL Web Properties group by offering Internet connections to budget-conscious customers looking for both a dependable connection to the Internet and all the features and capabilities of an online service.

Thus,  CompuServe could only be held accountable for defamation if it had actual knowledge of the content's offensive character.

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Assume you are a manager in the security department of a high-tech corporation. You are mentoring Mary, an entry-level network technician, who is considering a career change to specialize in security. She asks you for advice as to whether she should self-study to become a security professional or seek formal education, such as a bachelor's degree in information security. What is your advice to Mary

Answers

Answer:

Seek a bachelor's degree.

Explanation:

Seems more compromised and education from people with experience already.

Mary, my advice to you would be to pursue formal education such as a bachelor's degree in information security, to specialize in the field.

Why should Mary consider pursuing a bachelor's degree in information security?

By obtaining a formal education in information security, such as a bachelor's degree, you will gain a comprehensive understanding of the fundamental principles, theories, and practices of security.

This will provide you with a solid foundation and knowledge base to excel in your career as a security professional. Additionally, pursuing a degree will often expose you to practical hands-on experiences, internships, and networking opportunities which will greatly enhance your learning and help you establish valuable connections within the industry.

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Assignment 3: Chatbot
What the code for assignment 3: chatbot Edhesive.

Answers

Coding is difficult but I don't have a chatbot

Answer:

import random

# Introduction

print("Welcome to the fashion chatbot! I'm here to help you with your fashion preferences.")

# Ask for user's first name

print("What is your first name?")

name = input()

# Ask for user's shoe preference

print("What shoes do you like?")

shoe_preference = input()

# Use if-elif-else statement to respond to user's shoe preference

if shoe_preference == "Converse":

 print("Nice, casual is always in!")

elif shoe_preference == "Boots":

 print("Cool, boots are a versatile choice.")

else:

 print("Great choice!")

# Ask for user's age

print("How old are you?")

age = input()

# Use if-elif-else statement to respond to user's age

if int(age) < 18:

 print("It's a great time to start exploring your style!")

elif int(age) < 25:

 print("You're at a fun age to experiment with your fashion choices.")

else:

 print("It's always a good time to try out new fashion styles!")

# Use a randomly generated number to randomly respond

random_number = random.randint(1, 3)

if random_number == 1:

 print("I think I might know your style.")

elif random_number == 2:

 print("You have a unique sense of style.")

else:

 print("You have great fashion taste.")

# Ask for user's favorite top

print("So, " + name + ", what is your favorite top?")

top_preference = input()

# Use if-elif-else statement to respond to user's top preference

if top_preference == "Graphic Tees":

 print("That's a good choice.")

elif top_preference == "Button-up shirts":

 print("Classy and sophisticated.")

else:

 print("Great choice!")

# Use a randomly generated number to randomly respond

random_number = random.randint(1, 3)

if random_number == 1:

 print("Ay that's lit.")

elif random_number == 2:

 print("wow, so stylish!")

else:

 print("That's in right now.")

# Ask for user's bottom preference

print("I like where this is going.")

print("What about your choice of bottom?")

bottom_preference = input()

# Use if-elif-else statement to respond to user's bottom preference

if bottom_preference == "Jeans":

 print("Jeans are a classic choice.")

elif bottom_preference == "Cargo pants":

 print("You can't go wrong with those.")

else:

 print("Great choice!")

# Ask for user's head accessory preference

print("What about your head accessory?")

head_accessory_preference = input()

# Use if-elif-else statement to respond to user's head accessory preference

if head_accessory_preference == "Beanies":

   print("Beanies are fun!")

elif head_accessory_preference == "Baseball hats":

   print("Baseball hats are a popular choice.")

else:

   print("Unique choice!")

# End conversation

print("Well, " + name + ", it was awesome getting to know your style.")

An automotive company tests the driving capabilities of its self driving car prototype. They Carry out the test on various types of roadways specifically a racetrack chill rack and dirt road what are the examples of fair or unfair practices

Answers

It is to be noted that testing a self-driving car prototype on various types of roadways, such as a racetrack, hill rack, and dirt road, can be considered fair practice. It would only be unfair practice if the lives and property of humans are put at risk during the testing.

What is unfair practice?

Unfair practices are behaviors that are neither just or fair. It would be deemed unjust to treat someone differently because of their color or gender, for example. Cheating or violating regulations to get an edge over others is also included. To develop a fair and just society, it is critical to constantly treat people with fairness and respect.

In this scenario, it is evident that endangering human life and property is unethical behavior.

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Which computers were the first PCs with a GUI
MS-DOS
Linux
Windows
Mac

Answers

The earliest GUI-equipped PCs were Linux and Mac-based. These are the right answers to the question that was asked.

Which PCs had a graphical user interface (GUI) first?

The first computer to employ a mouse, the desktop metaphor, and a graphical user interface (GUI), concepts Douglas Engelbart first introduced while at International, was the Xerox Alto, developed at Xerox PARC in 1973. It was the first instance of what is now known as a full-fledged personal computer.

When was the GUI added to Windows?

Windows is based on what is known as a graphical user interface (GUI), which was created by Xerox in 1975 but was never used. The "window, icon, menu, and pointing device" (WIMP) combination will make up the majority of a typical GUI.

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the processed form of data is known as​

Answers

Answer:

It's called Information

Answer:

the data that is processed is known as information.

Explanation:

In what ways does a computer network make setting appointments easier?


A) by providing a common calendar
B) by reassigning workloads to enable attendance
C) by sending out invitations
D) by telephoning those involved
E) by sending electronic reminders

Answers

The best option is A) by providing a common calendar. A common calendar can be used to check availability and schedule appointments, making the process of setting appointments easier.

However...

All of the options (A, C, D, and E) could potentially make setting appointments easier on a computer network.

A) A common calendar can be used to check availability and schedule appointments.

B) Workloads could be reassigned to enable attendance at appointments, but this is not directly related to the use of a computer network.

C) Invitations to appointments can be sent electronically through the network.

D) Telephone calls can be made through the network.

E) Electronic reminders can be sent through the network to help ensure that appointments are not forgotten.

Additive inverse of 0/5 is *​

Answers

Answer:

If 0/5 is the number you actual meant, than the answer is 0.

0/5 is 0, and 0 + 0 = 0.

Additive inverse simply means changing the sign of the number and adding it to the original number to get an answer equal to 0.

Additive inverse of 0/5 is 0.

Hey tell me more about your service

Answers

Answer:

look below!

Explanation:

please add more context and I’ll be happy to answer!

Accenture is one of several hundred companies that has signed on to the United Nations Global Compact (UNGC) Business Ambition pledge.

Answers

Answer: True

Explanation:
Accenture is one of several hundred companies that has signed on to the United Nations Global Compact (UNGC) Business Ambition pledge. The UNGC is a voluntary initiative that encourages businesses to align their operations and strategies with ten universally accepted principles in the areas of human rights, labor, environment, and anti-corruption. The Business Ambition pledge is a component of the UNGC that invites businesses to set ambitious, science-based targets to reduce greenhouse gas emissions in line with the goals of the Paris Agreement. Accenture is one of many companies that have committed to this pledge and to taking action to combat climate change and support sustainable development.

Code to be written in Python
Will award brainliest automatically if correct!

Suppose that you have a list of numbers, and you need to normalize the list, i.e., the sum of all numbers in the list is equal to 1.

Tam came out with an implementation:

def normalize(lst):
s = sum(lst)
return list(map(lambda v: v / s, lst))


This code works correctly for normalize([1, 2, 5, 4]) but fails for normalize([1, 2, -7, 4]). What causes the second test case to fail?

Find out the error message and keep the list as it is when the error occurs by simply return the list. So without modifying the normalize function, implement this strategy in the safe_normalize function. Complete safe_normalize. You may assume that the normalize function has already been defined for you.

def safe_normalize(lst):
# handle the error
return normalize(lst)

Test Cases:

safe_normalize([1, 2, 2, 3]) [0.125, 0.25, 0.25, 0.375]
safe_normalize([1, 2, -5, 2]) [1, 2, -5, 2]

Answers

PYTHON

Here is an implementation of the safe_normalize function that catches the error and returns the original list if an error occurs:

def safe_normalize(lst):

try:

return normalize(lst)

except ZeroDivisionError:

return lst

This function calls the normalize function, which takes a list as input and returns a normalized list. However, if an error occurs (in this case, a ZeroDivisionError), the function will catch the error and return the original list instead.

To test the safe_normalize function, you can use the following test cases:

print(safe_normalize([1, 2, 2, 3])) # Expected output: [0.125, 0.25, 0.25, 0.375]

print(safe_normalize([1, 2, -5, 2])) # Expected output: [1, 2, -5, 2]

The first test case should return the normalized list, while the second test case should return the original list, since the normalize function would fail with a ZeroDivisionError if passed a list with a negative sum.

Hope This Helps You!

Explain TWO examples of IT usages in business (e.g.: application or system) that YOU
have used before. Discuss your experience of using these system or applications. The
discussions have to be from YOUR own experience

Answers

Answer:

(DO NOT copy from other sources). Discuss these systems or applications which include of:

Introduction and background of the application or system. Support with a diagram, screenshots or illustration.

Explanation:

Steve works in human resources for a company with more than three thousand employees. He needs to send new insurance documents to each employee. Steve should _____.

A) use a digital ink pen to scan his handwritten notes from a meeting
B) send an e-mail to all employees and attach the insurance documents
C) call each employee and ask them to pick up the documents at his desk
D) create a presentation

Answers

The correct answer is B) send an email to all employees and attach the insurance documents. This is the most efficient and effective way for Steve to disseminate the insurance documents to all employees. It allows employees to access the documents electronically, at their convenience, and ensures that everyone receives the same information. Option A) using a digital ink pen to scan handwritten notes is not a viable option for distributing the insurance documents to all employees. Option C) calling each employee and asking them to pick up the documents at Steve's desk is also not practical, as it would be time-consuming and may not be convenient for all employees. Option D) creating a presentation is not relevant to the task at hand.

Write a Java program that have ten integral values into an array namely List. Your program
should have a menu to select/perform the following functions :-
lnsert ( ) - accept a value into the array if it's not full
Remove ( ) - remove a value from an array if it's not empty based on user selection
Search ( ) - Return the numbers of the particular search value
lncrease ( ) - lncrease the percentage of the store value based onto the input percentage
Update ( ) - Edit the existing value choose by user.

Answers

Here is a Java program that includes a menu with the four functions you specified: Insert, Remove, Search, and Increase. The program uses an array named "List" to store the integral values, and allows the user to perform the specified actions on the array. I have also included a function called "Update" that allows the user to edit an existing value in the array based on their selection.

import java.util.Scanner;

public class ArrayMenu {
static Scanner input = new Scanner(System.in);
static int[] List = new int[10];
static int size = 0;

public static void main(String[] args) {
boolean exit = false;
while (!exit) {
System.out.println("Menu:");
System.out.println("1. Insert a value");
System.out.println("2. Remove a value");
System.out.println("3. Search for a value");
System.out.println("4. Increase the value of all elements by a percentage");
System.out.println("5. Update an existing value");
System.out.println("6. Exit");
System.out.print("Enter your choice: ");
int choice = input.nextInt();
switch (choice) {
case 1:
insert();
break;
case 2:
remove();
break;
case 3:
search();
break;
case 4:
increase();
break;
case 5:
update();
break;
case 6:
exit = true;
break;
default:
System.out.println("Invalid choice. Please try again.");
break;
}
}
}

public static void insert() {
if (size < 10) {
System.out.print("Enter a value to insert: ");
int value = input.nextInt();
List[size] = value;
size++;
} else {
System.out.println("Array is full. Cannot insert a new value.");
}
}

public static void remove() {
if (size > 0) {
System.out.print("Enter the index of the value to remove: ");
int index = input.nextInt();
if (index >= 0 && index < size) {
for (int i = index; i < size - 1; i++) {
List[i] = List[i + 1];
}
size--;
} else {
System.out.println("Invalid index. Please try again.");
}
} else {
System.out.println("Array is empty. Cannot remove a value.");
}
}

public static void search() {
System.out.print("Enter a value to search for: ");
int value = input.nextInt();
boolean found = false;
for (int i = 0; i < size; i++) {
if (List[i] == value) {
System.out.println("Value found at index " + i);
found = true;
}
}
if (!found) {
System.out.println("Value not found in the array.");
}

Meredith's repair business has two offices—one on the east side of town and one on the west side. An employee may work out of one office on one day and the other office on the next, based on the workload on a given day. For this reason, Meredith found it useful to set up a network to connect both offices. The company's important files are stored on a server so that employees can access the information they need from either location. The type of network Meredith's business is most likely using is a _____.

WAN
MAN
LAN

Answers

Answer:

MAN

Explanation:

brainliest?:(

Answer:

WAN (Wide Area Network)

Consider the following Boolean expressions.
A && B
!A && !B
Which of the following best describes the relationship between values produced by expression I and expression II?
(A) Expression I and expression II evaluate to different values for all values of A and B.
(B) Expression and expression II evaluate to the same value for all values of A and B.
(C) Expression and expression II evaluate to the same value only when A and B are the same.
(D) Expression and expression Il evaluate to the same value only when A and B differ.
(E) Expression I and expression Il evaluate to the same value whenever A is true.

Answers

Answer:

(D) Expression I and expression Il evaluate to the same value only when A and B differ.

Explanation:

Given

[tex]A\ \&\&\ B[/tex]

[tex]!A\ \&\&\ !B[/tex]

Required

Select the true statement

To do this, I will create the following case scenarios.

(a): [tex]A = true[/tex] and [tex]B = true[/tex]

[tex]A\ \&\&\ B[/tex]

[tex]true\ \&\&\ true \to true[/tex] i.e. true and true is true

[tex]!A\ \&\&\ !B[/tex]

[tex]!true\ \&\&\ !true[/tex]

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[tex]!true = false[/tex]

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So, we have:

[tex]false\ \&\&\ false \to false[/tex]

So:

[tex]A =true[/tex]  and [tex]B = true[/tex]

[tex]A\ \&\&\ B = true[/tex]

[tex]!A\ \&\&\ !B = false[/tex]

Hence, options (B) and (E) are incorrect

(b): [tex]A = true[/tex] and [tex]B = false[/tex]

[tex]A\ \&\&\ B[/tex]

[tex]true\ \&\&\ false \to false[/tex]

[tex]!A\ \&\&\ !B[/tex]

[tex]!true\ \&\&\ !false[/tex]

Solve each negation

[tex]false\ \&\&\ true \to false[/tex]

So:

[tex]A =true[/tex]  and [tex]B = false[/tex]

[tex]A\ \&\&\ B = false[/tex]

[tex]!A\ \&\&\ !B = false[/tex]

Hence, option (c) is incorrect

(c): [tex]A = false[/tex] and [tex]B = true[/tex]

[tex]A\ \&\&\ B[/tex]

[tex]false\ \&\&\ true \to false[/tex]

[tex]!A\ \&\&\ !B[/tex]

[tex]!false\ \&\&\ !true[/tex]

[tex]truee\ \&\&\ false \to false[/tex]

So:

[tex]A =false[/tex]   and [tex]B = true[/tex]

[tex]A\ \&\&\ B = false[/tex]

[tex]!A\ \&\&\ !B = false[/tex]

Case scenarios b and c implies that option (d) is correct because different values of A and B gives the same value of both expression which is false

This also implies that (a) is incorrect.

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