Computer Science - Central Processing Unit Multiple Choice Questions with Answers

Questions

1 DMA module can communicate with CPU through

A Interrupt

B Cycle stealing

C Branch instruction

D None of these

Answer: Option [B]

2 ‘Cycle Stealing’ is associated with

A Data transfer among registers

B DMA

C Pipelining

D Microprogramming

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

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

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

Answer: Option [C]