Question Detail

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.

1. I/O processor has direct access to ?

Main Memory
Secondary Memory
Flash Memory
ROM

Answer: Option A

2. What is meaning of IOP ?

Input output processor
Input output product
Input output producer
Input output processing

Answer: Option A

3. An exception condition in a computer system caused by an event external to the CPU is known as ?

Halt
Process
Interrupt
None of above

Answer: Option C

Explanation:

In my own experience I found very few questions with answer "None of above", if you do not know the answer then its always better to guess among other (If there is no negative marking) ;)

4. Instruction that are used for reading from memory by an IOP called ?

Commands
Pulses
Blocks
Interrupt

Answer: Option A

5. User programs interact with I/O devices through ?

Operating System
Hardware
Buses
Processor

Answer: Option A