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#111 ________ Register holds either the address of the instruction being executed or the address of the next instruction to be executed .
A) Program counter
B) Memory buffer register
C) Data register
D) Counter register
Answer: A
#112 System bus connects the central processing unit to ___________ on the motherboard .
A) Register
B) Main memory
C) ALU
D) Input unit
Answer: B
#113 which of the following steps in the instruction cycle interprets the instruction?
A) Fetch
B) Decode
C) Execute
D) Write-back
Answer: B
#114 __________ instruction is used when number of statements is to be repeated.
A) LD
B) LOOP
C) JMP
D) MOV
Answer: B
#115 How many op-codes do a zero-Address instruction has?
A) 1
B) 2
C) 3
D) 0
Answer: A
#116 which of the following is not arithmetic instruction?
A) DIV
B) MUL
C) SUB
D) JMP
Answer: D
#117 ________ 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
#118 which of the following is the firmware built into the computer system ?
A) Slot
B) RAM
C) Port
D) BIOS
Answer: D
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