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Computer Science - Central Processing Unit Multiple Choice Questions with Answers

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(1) DMA module can communicate with CPU through
[A] Interrupt
[B] Cycle stealing
[C] Branch instruction
[D] None of these

Comment

Answer: Option [B]
(2) ‘Cycle Stealing’ is associated with
[A] Data transfer among registers
[B] DMA
[C] Pipelining
[D] Microprogramming

Comment

Answer: Option [B]
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(3) On getting, an interrupt, CPU
[A] finishes the current instruction and moves to interrupt service routine
[B] immediately moves to interrupt service routine without completing current instruction
[C] releases the control on I/O lines and memory lines
[D] makes the peripheral device, which requested the interrupt wait for fixed interval of time

Comment

Answer: Option [B]
(4) The ALU unit of a computer
[A] can perform addition, subtraction operations
[B] can perform all types of arithmetic operations
[C] can perform AND, OR and multiplication operations
[D] contains number of counters

Comment

Answer: Option [B]
(5) A CPU has 16 bit program counter. This means that the CPU can address -
[A] 16K memory locations
[B] 32K memory locations
[C] 64K memory locations
[D] 256K memory locations

Comment

Answer: Option [C]

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