Computer science most repeated mcqs

Control Unit of a digital computer is often called the

A. Clock
B. Nerve center
C. ICs
D. All of the above

Answer & Solution

Option: B
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What happen when data is entered into a memory location?

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A. It will add to the content of the location
B. It will change the address of the memory location
C. It will erase the previous content
D. It will not be fruitful if there is already some data at that location

Answer & Solution

Option: C
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Pick out the wrong statement about modern computer systems

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A. Even beginners, untrained persons can safely handle them
B. it is important to understand the proper handling of each element and proper overall procedures must be followed
C. The negligent use of a computer system will almost always introduce time bombs into the system.
D. These are simple and easy to take care of

Answer & Solution

Option: A
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Pick up the correct statement about computers

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A. Computers process data with human intervention after the program has been fed
B. Computers have the built-in ability to obey different types of instructions.
C. All comparisons are made in the control section
D. The arithmetic-logic section of the CPU selects, interprets and executes the program steps.

Answer & Solution

Option: B
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A computer has very high speed, accuracy and reliability. Its intelligence quotient could be of the order of

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A. 100
B. 0
C. 50
D. 200

Answer & Solution

Option: B
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Which Register contains the last instruction fetched?

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A. PC
B. IR
C. MBR
D. MAR

Answer & Solution

Option: B
Explanation :The IR which stands for the instruction register contains the last instruction fetched.
The instruction register (IR) or current instruction register (CIR) is the part of a CPU’s control unit that holds the instruction currently being executed or decoded.
An instruction register holds a machine instruction that is currently being executed. In general, a register sits at the top of the memory hierarchy. A variety of registers serve different functions in a central processing unit (CPU) – the function of the instruction register is to hold that currently queued instruction for use.
All the others options are registers which are used for the fetch operation.

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Personnel who design, program, operate and maintain computer equipment called

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A. Peopleware
B. Programmer
C. Console-operator
D. System Analyst

Answer & Solution

Option: A
Explanation :Peopleware can refer to anything that has to do with the role of people in the development or use of computer software and hardware systems, including such issues as developer productivity, teamwork, group dynamics, the psychology of programming, project management, organizational factors, human interface design, and human-machine-interaction.

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