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Microprocessor

Microprocessor
Length of the instruction POP D is

 2 byte
 4 byte
 1 byte
 3 byte

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Microprocessor
SPHL instruction copies the content of H-L register pair to the _________.

 D-E
 PSW
 Stack Pointer
 B-C

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Microprocessor
Pick out the matching pair

 SID; SIM
 READY; RIM
 S0;S1;wait status
 HOLD; DMA

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Microprocessor
In Fortran 77 a variable name can contain special characters.

False
True

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Microprocessor
An I/O processor controls the flow of information between

Cache memory and I/O devices
Cache and main memory
Two I/O devices
Main memory and I/O devices

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Microprocessor
While using a frequency counter for measuring frequency, two modes of measurement are possible: Period time Frequency mode There is a ‘cross-over frequency’ below which the period mode is preferred. Assuming the crystal oscillator frequency to be 4MHz, the crossover frequency is given by

 8 Mhz.
 2 Mhz.
 2 Khz.
 1Khz.

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