Computer Science - Central Processing Unit Multiple Choice Questions with Answers

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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]

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