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User programs interact with I/O devices through ?

  • Operating System
  • Hardware
  • Buses
  • Processor

Answer: Option A

Similar Questions :

1. Which memory is assembled between main memory and CPU ?

  • Primary Memory
  • Secondary Memory
  • Registers
  • Cache Memory

Answer: Option D

2. What is meaning of "VAD" ?

  • Velocity Address
  • Viscous Address
  • Vector Address
  • Volatile Address

Answer: Option C

3. What is full form of LED ?

  • Low Emitting Diode
  • Light Emitting Diode
  • Light Emitting Data
  • Light Encounter Diode

Answer: Option B

Explanation:

In optical mouse we use pair of LED.

4. What is meaning of DMAC ?

  • Dual memory access controller
  • Direct memory access controller
  • Direct memory access computer
  • Direct memory accumulator controller

Answer: Option B

5. Asynchronous means ?

  • Not in step with the elapse of time
  • Not in step with the elapse of address
  • Not in step with the elapse of data
  • Not in step with the elapse of control

Answer: Option A

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