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Microprocessor

Microprocessor
Pick out the matching pair

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

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Microprocessor
At the beginning of a fetch cycle, the contents of the program counter are

 transferred to memory data register.
 incremented by one.
 transferred to memory address register .
 transferred to address bus.

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Microprocessor
A single instruction to clear the lower nibble of accumulator in 8085 language assembly is

 XRI 0FH
 XRI FOH
 ANI OFH
 ANI F0H

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Microprocessor
The 8085 microprocessor uses a crystal of frequency 6.25 Mhz. The T-state value is

 960ns
 320ns
 640ns
 1280ns

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Microprocessor
Identify the communication interfacing device from the following

 8257
 8251
 8255
 8155

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

False
True

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