Question Detail

User programs interact with I/O devices through ?

  • Operating System
  • Hardware
  • Buses
  • Processor

Answer: Option A
Similar Questions :

1. __ read the data by reflecting pulses of laser beams on the surface ?

  • Magnetic disk
  • Optical disk
  • Floppy disk
  • ROM

Answer: Option B

2. What is meaning of PCB ?

  • Process control block
  • Preempitive control block
  • Process close block
  • Process carrying block

Answer: Option A

3. Which interrupt establishes a priority over the various sources to determine which request should be entertained first ?

  • Polling
  • Daisy chaining
  • Priority interrupt
  • All of above

Answer: Option C

4. A number system that uses only two digits, 0 and 1 is known as ?

  • Octal number system
  • Hexadecimal system
  • Binary system
  • Decimal system

Answer: Option C

5. I/O processor has direct access to ?

  • Main Memory
  • Secondary Memory
  • Flash Memory
  • ROM

Answer: Option A

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