Computer Organization Mid - I, February - 2012

1.The two parts in floating-point representation are ________ .
  • radix, mantissa
  • mantissa, base
  • mantissa, exponent
  • radix, exponent
Answer: C
2.The part of the hardware of computer that controls the transfer of information between computer and outside
world is_________.
  • CPU
  • memory
  • IOP
  • microprocessor
Answer: C
3.Signed 1’s complement representation of -14 with eight bits is_______________
  • 11110001
  • 01110001
  • 10001110
  • 00001110
Answer: A
4.The complement of decimal number 85 is__________
  • 84
  • 15
  • 14
  • 16
Answer: C
5.The advantage with normalized floating-point number is ------------.
  • easy to represent
  • any base number can be represented
  • provide maximum possible precision
  • requires less number of cpu registers
Answer: C
6.Odd parity generator can be implemented with_________.
  • AND function
  • OR function
  • exclusive & OR function
  • Exclusive - OR & Exclusive-NOR function
Answer: D
7.In the instruction cycle the phase that reads instruction into instruction register from memory is
  • fetch
  • Decode
  • read effective address
  • execute the instruction
Answer: A
8.Decimal arithmetic operations use ___________
  • Half adders
  • full adders
  • BCD adders
  • parallel adders
Answer: C
9.The characteristic that is not applicable for RISC architecture is_______________.
  • fixed length instruction format
  • memory access is limited to load and store instructions
  • micro program control
  • all operations within registers of CPU
Answer: C
10.Consider register A holding decimal 8760 in BCD. The micro operation dshl A(Decimal shift left register
A) produces____________.
  • 1000 0111 0110 0000
  • 0000 1110 1100 0000
  • 0111 0110 0000 1000
  • 0111 0110 0000 0000
Answer: D
11.The 1’s complement of decimal number 21 in binary is___________.
Answer: 01010
12.A digital computer with more than one processor is called-------------------------.
Answer: Multiprocessor system
13.If a 3-bit message 010 is transmitted with suffix of even parity bit, the resultant message is____________.
Answer: 0101
14.The program that translates symbolic micro program into its binary equivalent is__________.
Answer: Assembler
15.In decimal arithmetic the symbolic designation dshl A represents__________.
Answer: Decimal shift left register A
16.The computer register used to hold address of instruction is______________
Answer: Program counter
17.The addressing mode in which the address part of the instruction is added to program counter in order to
obtain effective address is_____________.
Answer: Relative address mode
18.Internal interrupts are also called as_____________.
Answer: Traps
19.The next address generator in a micro programmed control unit is referred to as_____________.
Answer: Sequencer
20.The interrupts that arises from illegal or erroneous use of an instruction or data are called
as___________________.
Answer: Software interrupts