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Microprocessor

Microprocessor
The number of output pins in 8085 microprocessors are

 21.
 27.
 19.
 40.

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Microprocessor
A mask programmed ROM is

 programmed at the time of fabrication
 programmed by the user
 erasable and programmable
 erasable electrically

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Microprocessor
In order to complement the lower nibble of accumulator one can use

 ORI 0FH
 ANI 0FH
 XRI 0FH
 CMA

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Microprocessor
Which of the following instruction is not possible in 8085?

 POP 30 H
 POP PSW
 POP D
 POP B

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Microprocessor
A microprocessor with a 12-bit address bus will be able to access

 8 K bytes
 1 K bytes
 10 K bytes
 4 K bytes

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Microprocessor
The content of the A15-A8 (higher order address lines) while executing “IN 8-bit port address” instruction are

 all bits reset (i.e. 00H)
 irrelevant
 all bits set (i.e. FFH)
 same as the content of A7-A0

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