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Microprocessor

Microprocessor
DMA is used between

 none
 microprocessor and memory
 microprocessor and I/O
 memory and I/O

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Microprocessor
Consider the following statements: Arithmetic Logic Unit (ALU) 1.Performs arithmetic operations 2.Performs comparisons. 3.Communicates with I/O devices 4.Keeps watch on the system Which of these statements are correct?

 3 and 4 only
 1, 2, 3 and 4
 1, 2 and 3
 1 and 2 only

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Microprocessor
How many machine cycles are required for execution of IN 30H instruction

 4
 3
 5
 6

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Microprocessor
The timing difference between a slow memory and fast processor can be resolved if

External buffer is used
Processor is capable of waiting
Neither A nor B
Either A or B

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Microprocessor
Identify the non-maskable interrupt from the following

 RST 6.5
 RST 4.5
 RST 5.5
 RST 7.5

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Microprocessor
Identify the programmable interval timer from the following

 8275
 8279
 8253
 8252

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