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3 years ago

Which of the following could NOT be represented by a boolean variable?

Computers and Technology

1 answer:

Len [333]3 years ago

8 0

Answer:

Whether a traffic light is green, yellow or red

Explanation:

Boolean variables are variables that can either take one out of two options at any given instance.

Analyzing the given options

1. Elevator:

Possible Directions = Up or Down; That's two possible values

But it can only move in one direction at a given instance.

This can be represented using Boolean

2. Traffic Light:

Possible Lights = Green, Yellow or Red

That's three options.

This can be represented using Boolean

The last two options can be represented using Boolean because they have just two possible values

Hence, option (B) answers the question

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A company is executing a strategy to encrypt and sign all proprietary data in transit. The company recently deployed PKI service

Softa [21]

Answer:

A. S/MIME

B. TLS

C. Kerberos

Explanation:

PKI : Public Key Infrastructure is a technique which will allow services or applications to communicate securely across the unsecured network or internet.

PKI mainly consist of CA or Certificate Authority who can issue digital certificates or they are also known as trusted CA. exmaples are godaddy, digicert, verizone, symmantec, etc.. and RA also known as Registration Authorities and they verify if the requested certificates can be stored at CA. Keys will be stored in the central directory.It will also consists of certificate management system and the policies governing PKI.

S/MIME : Secure/Multipurpose Internet Mail Extensions which use assymentric cryptography and sign the MIME data. S/MIME will provide services like Authentication, Encryption , Integrity, Privacy and Non repudiation for messaging applications

SMIME uses certificates which can be self signed or CA certified. It specifies MIME type as $application/pkcs7-mime$ while transmitting the data.

TLS : Transport Layer Security. the earlier versions used to be known as SSL ( Secure Socket Layer) SSLv3 got depreciated and TLSv1.2/1.3 are popularly used to provide encryption, authentication, Integrity and Hashing for client to server side communication.

Most of the applications communicate securely using TLS. They will establish secure TCP connection using SSL Handshake. During the Handshake they will exchange supported versions, ciphersuites and certificates. Applications which uses TLS always uses CA certificates and Inhouse applications can communicate using self signed certificate or even with CA certificates.

HTTPS which is also known as HTTP over SSL is widely used for almost all the web services to communicate securely across the internet.

Kerberos : It is a protocol used to prove the identity for two nodes which are communicating with each other. Kerberos uses both symmetric key cryptography and assymetric key cryptography. However, symmetric key cryptography is used widely and public key cryptography is used optionally.

Authentication server which is also known as AS is used to authenticate the requesting client. It further forwards the user credentials to key distribution center. KDC further issues to TGT ( ticket granting ticket) and it uses TGS's secret key to encrypt. User will receive a encrypted output.

When a User Login then The client authenticates itself to the Authentication Server (AS) which forwards the username to a key distribution center (KDC). The KDC issues a ticket-granting ticket (TGT), which is time stamped and encrypts it using the ticket-granting service's (TGS) secret key and returns the encrypted result to the user's workstation. Sessions will be renewed and managed by users session manager.

4 0

3 years ago

How to make a cartoon can we use adobe flash

zvonat [6]

Yes you can use adobe flash to make a cartoon

4 0

3 years ago

Read 2 more answers

A teacher has five students who have taken four tests. The teacher uses the following grading scale to assign a letter grade to

AlladinOne [14]

Answer:

#include <iostream>

using namespace std;

int main()

{

const int numofStudents = 5;//number of students

const int numofTests = 2;//number of tests taken by students

const int grade = 5;//number of grades available

char letter[grade] = { 'A','B','C','D','F' };

double table[numofStudents][numofTests];//defining 2darray with names and scores

string names[numofStudents];//storing names of students

for (int num = 0; num < numofStudents; num++)//storing names and scores of students

{

cout << "Enter student's name: ";

cin >> names[num];

for (int test = 0; test < numofTests; test++)//scores loop

{

cout << "Enter the test score: ";

cin >> table[num][test];

if (table[num][test] < 0 || table[num][test]>100)//input validation

{

cout << "Invalid input. Try again" << endl;

cin >> table[num][test];//input again

}

for (int i = 0;i < numofStudents;i++)//calculating averages and grades

{

int sum = 0;

cout << "Test scores for " << names[i] << ": " << endl;

for (int j = 0;j < numofTests;j++)

{

cout << table[i][j] << " ";

sum += table[i][j];//summing scores

}

cout << endl;

float average = (float)sum / numofTests;//calculating the average

cout << "Making an average of: "<< average;

if (average <= 100 && average >= 90)//assigning a grade

{

cout << " and has received an " << letter[0];

}

else if (average <= 89 && average >= 80)

{

cout << " and has received a " << letter[1];

}

else if (average <= 79 && average >= 70)

{

cout << " and has received a " << letter[2];

}

else if (average <= 69 && average >= 60)

{

cout << " and has received a " << letter[3];

}

else if (average <= 59 && average >= 0)

{

cout << " and has received an " << letter[4];

}

else

{

cout << "Invalid scores entered." << endl;

}

cout << endl;

}

return 0;

}

Explanation:

We first define the number of students, number of tests and number of grades available for assignments. We then fill in the 2D array of students names and their scores making sure assigning more than 100 and less than 0 is not allowed. We then sum the scores and retrieve an average. Using the average, a letter grade is assigned to that individual.

6 0

3 years ago

1) If a robot has a 3 bit instruction set and needs 20 instructions to reach its destination, how many bits of memory are requir

mariarad [96]

Answer:

Explanat500,000ion:

8 0

3 years ago

Windows administration allows a certain level of access for a file or folder to be assigned to a(n) ____________________ rather

soldi70 [24.7K]

Answer:

Group

Explanation:

A folder assigned to a single user can only be accessed by a single person, to get many users access a folder windows administrator shares a folder to a workgroup. using the simple steps below.

Login as the admin of the system, Right-click on the folder you want to give permission on, after clicking on properties, click on security, add user or group after clicking the edit. and your folder is shared to a group and all users in the group have access to it.

6 0

3 years ago