1. Which one of the following statements regarding the INT (interrupt) and the BRQ (but request) pins in a CPU is true?

1. 1. The BRQ pin is sampled after every instruction cycle, but the INT is sampled after every machine cycle

   
   
   

   2. Both INT and BRQ are sampled after every machine cycle

   
   
   

   3. The INT pin is sampled after every instruction cycle, but the BRQ is sampled after every machine cycle

   
   
   

   4. Both INT and BRQ are sampled after every instruction cycle

   
   
   

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1. View Hint View Answer Discuss in Forum

   Interrupt is sampled after every machine cycle and Bus request pin is sampled after every instruction cycle.

   Correct Option: A

   Interrupt is sampled after every machine cycle and Bus request pin is sampled after every instruction cycle.

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2. An advantage of memory interfacing is that
   

1. 1. a larger memory is obtained

   
   
   

   2. effective speed of the memory is increased

   
   
   

   3. the cost of the memory is reduced

   
   
   

   4. a non-volatile memory is obtained

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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3. Return from a subroutine is affected by
   

1. 1. a jump instruction

   
   
   

   2. an RST instruction

   
   
   

   3. a RET instruction

   
   
   

   4. a hardware interrupt signal

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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4. The process of causing an unplanned branching operation to occur, usually initiated by external system is called

1. 1. debugging

   
   
   

   2. masking

   
   
   

   3. interrupt

   
   
   

   4. iteration

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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5. WAIT states are used
   

1. 1. to give slow devices additional time to put out valid data

   
   
   

   2. to insert a deliberate delay

   
   
   

   3. during I/O operation

   
   
   

   4. none of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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