Computer Knowledge Practice Question and Answer

Q:

Which of the following devices tells the difference between multicast and unicast packets?

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  • 1
    multicast switch
    Correct
    Wrong
  • 2
    developed
    Correct
    Wrong
  • 3
    advanced router
    Correct
    Wrong
  • 4
    multicast router
    Correct
    Wrong
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Answer : 1. "multicast switch"
Explanation :

Multicast switch


Q:

Sakshat brought by Ministry of Human Resource Development on ICT (Information and Communication Technology) -

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  • 1
    There is a book.
    Correct
    Wrong
  • 2
    Is a project.
    Correct
    Wrong
  • 3
    Is a campaign.
    Correct
    Wrong
  • 4
    Is a 'one stop portal'.
    Correct
    Wrong
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Answer : 4. "Is a 'one stop portal'."
Explanation :

The pilot project SAKSHAT: A One Stop Education Portal launched on October 30, 2006 by His Excellency, the then President of India to facilitate lifelong learning for students, teachers and those in employment or in pursuit of knowledge free of cost to them

Q:

Which of the following are Operators in C?

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  • 1
    arithmetic operators
    Correct
    Wrong
  • 2
    logical operator
    Correct
    Wrong
  • 3
    relational operators
    Correct
    Wrong
  • 4
    all of the above
    Correct
    Wrong
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Answer : 4. "all of the above"
Explanation :

Operators are symbols that we use when performing operations on one or more operands. The primary types of operators in C are arithmetic, logical, relational, conditional, bitwise, and assignment.

Q:

Why is clrscer() used?

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  • 1
    to erase
    Correct
    Wrong
  • 2
    to clear the message from the screen
    Correct
    Wrong
  • 3
    to store
    Correct
    Wrong
  • 4
    for all of the above
    Correct
    Wrong
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Answer : 2. "to clear the message from the screen"
Explanation :

The clrscr in C is a built-in function that is used for clearing the screen of the console output during the execution of the C program. This function is defined in the conio. h header file. We need to include the “conio.

Q:

What is the difference between do-while and while condition?

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  • 1
    In do-while, a semicolon is used after the condition.
    Correct
    Wrong
  • 2
    Semicolon is not used in While
    Correct
    Wrong
  • 3
    While statement is after the condition
    Correct
    Wrong
  • 4
    none of the above
    Correct
    Wrong
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Answer : 4. "none of the above"
Explanation :

The key difference lies in when the loop condition is checked. In the while loop, the condition is checked before the first iteration, potentially resulting in zero iterations. In the do-while loop, the condition is checked after the first iteration, ensuring that the loop body is executed at least once.

Q:

Which of the following is not true for for-loop?

443 0

  • 1
    for (i=0; i
    Correct
    Wrong
  • 2
    for (int i=0; i>9; i++)
    Correct
    Wrong
  • 3
    for (i=10; i
    Correct
    Wrong
  • 4
    for (i=10; i++; i
    Correct
    Wrong
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Answer : 4. "for (i=10; i++; i"
Explanation :

Among the given statements about for loops, the one that is NOT true is that they are used to replace user input while loops. While for loops are typically used for iterations with a known count and are less likely to result in an infinite loop if used correctly, they do not specifically replace user input while loops.

Q:

Which of the following is the full form of MOOC?

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  • 1
    Modern Open Online Courses
    Correct
    Wrong
  • 2
    Massive Open Online Courses
    Correct
    Wrong
  • 3
    Massive Online Open Courses
    Correct
    Wrong
  • 4
    Mechanical Online Courses
    Correct
    Wrong
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Answer : 2. "Massive Open Online Courses"
Explanation :

1. Massive Open Online Courses (MOOC) are changing the world of education by providing free online courses.

2. MOOC is a web-based free distance learning program that ensures the participation of students from geographically remote areas in the field of education.

3. It offers free online courses for higher education, executive education and employee development.

Q:

What is the full form of OTP?

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  • 1
    One the phone
    Correct
    Wrong
  • 2
    One Time Password
    Correct
    Wrong
  • 3
    Out to practice
    Correct
    Wrong
  • 4
    One Time Programmable
    Correct
    Wrong
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Answer : 2. "One Time Password"
Explanation :

1. The full form of OTP is One one-time password.

2. OTP is used as one of the additional security features for secure online transactions.

3. The OTP feature prevents certain types of identity theft by ensuring that a captured username/password pair cannot be used a second time.

4. The user's login name usually remains the same, and the one-time password changes with each login.

5. One-Time Password (aka One-Time Passcode) is a form of strong authentication, providing better security to eBanking, corporate networks, and other sensitive data systems.

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