IT / Computer Science MCQs

#57 which of the following register has a special role in multiply and divide operations ?

A) Base register
B) Memory buffer register
C) Data register
D) Counter register
Answer: A

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#58 System bus connects the central processing unit to ___________ on the motherboard .

A) Register
B) Main memory
C) ALU
D) Input unit
Answer: B

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#59 which of the following steps in the instruction cycle interprets the instruction?

A) Fetch
B) Decode
C) Execute
D) Write-back
Answer: B

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#60 __________ instruction is used when number of statements is to be repeated.

A) LD
B) LOOP
C) JMP
D) MOV
Answer: B

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#61 _________ is a microprocessor architecture that is designed to perform a small number of computer instructions.

A) RISK
B) CISC
C) DISK
D) LIST
Answer: A

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#62 How many op-codes do a zero-Address instruction has?

A) 1
B) 2
C) 3
D) 0
Answer: A

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#63 which of the following is not arithmetic instruction?

A) DIV
B) MUL
C) SUB
D) JMP
Answer: D

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#64 ________ changes alternating current (AC) to low-voltage direct current (DC) to operate the processor and peripheral devices.

A) Motherboard
B) Power supply
C) Output unit
D) Register
Answer: B

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