Computer Organization MCQs Set-4

1. Logic X-OR operation of (4ACO) H & (B53F) H results
  • AACB
  •  0000
  • FFFF
  • ABCD
2. When CPU is executing a Program that is part of the Operating System, it is said to be in
  • Interrupt mode
  • System mode
  • Half mode
  • Simplex mode
3. An n-bit microprocessor has
  • n-bit program counter
  • n-bit address register
  • n-bit ALU
  • n-bit instruction register
4. Cache memory works on the principle of
  • Locality of data
  • Locality of memory
  • Locality of reference
  • Locality of reference & memory
5. The main memory in a Personal Computer (PC) is made of
  • cache memory
  • static RAM
  • Dynamic Ram
  • both (A) and (B)
6. In computers, subtraction is carried out generally by
  • 1’s complement method
  • 2’s complement method
  • signed magnitude method
  • BCD subtraction method
7. PSW is saved in stack when there is a
  • interrupt recognised
  • execution of RST instruction
  • Execution of CALL instruction
  • All of these
8. The multiplicand register & multiplier register of a hardware circuit implementing booth’s algorithm have (11101) & (1100). The result shall be
  • (812) 10
  •  (-12) 10
  • (12) 10
  • (-812) 10
9. The circuit converting binary data in to decimal is
  • Encoder
  • Multiplexer
  • Decoder
  • Code converter
10. A three input NOR gate gives logic high output only when
  • one input is high
  • one input is low
  • two input are low
  • all input are high