Computer Knowledge

Computer Fundamentals and System Concepts

2,421 Questions

Computer fundamentals and system concepts questions cover core hardware components, operating systems, and historical computer milestones. Topics include the kernel, central processing unit, and basic computing terminology. These foundational questions are strictly essential for scoring well in computer knowledge sections.

Central processing unitComputer operating systemsSupercomputer milestonesSystem registry functionsKernel operationsAndroid applications

Computer Fundamentals and System Concepts Questions

Multiple choice

How are the carry flag (CY) and parity flag (PF) affected by the following instructions?

MOV A, #0F5H ADDA, #0BH

  1. CY = 0; PF = 0

  2. CY = 1; PF = 0

  3. CY = 1; PF = 1

  4. CY = 0; PF = 1
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

MOV A, #0F5H; A=F5 hex ADDA, #0BH; A=F5+0B=00F5 +0B => 1111 0101 + 0000 1011 = 0000 0000 After the addition register A(destination) contains 00, the flags are as follows: CY = 1 as there is carry out from D7. PF = 1 as the number of 1’s is zero.

Multiple choice

Telex machines allow exchange of

  1. Photos

  2. Text

  3. Email messages

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Telex is an international system of telegraphy with printed messages transmitted and received by teleprinters using the public telecommunications network.

Multiple choice

Find the odd one out.

  1. IBM mainframe

  2. Apple Macintosh (Motorla based)

  3. Sun sparc

  4. IBM PC
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

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Multiple choice

When a user program calls a system call

  1. mode changes to system mode

  2. interrupts are enabled

  3. system call number is sued to find out code in system call interrupt vector area

  4. all of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

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Multiple choice

Find the odd-one out.

  1. Programmers (assembly) can access all registers in a processor

  2. Programmer (assembly) cannot access all registers in a processor

  3. Some registers are not part of instruction set

  4. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

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Multiple choice

__________ type of maintenance refers to the change of software to some new environment so that different hardware platforms are used with different operating systems.

  1. Distributed control

  2. Corrective maintenance

  3. Event based control

  4. Perfective maintenance

  5. Adaptive maintenance
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

 Adaptive maintenance refers to the change of software to some new environment so that different hardware platforms are used with different operating systems.