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Microprocessor

Microprocessor
In order to save accumulator value on the stack, which of the following instruction may be used

 PUSH A
 PUSH PSW
 POP PSW
 PUSH SP

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Microprocessor
How many bytes in a zero memory page should be reserved for vectors used by RST instructions?

 32.
 64.
 128.
 16.

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Microprocessor
The reason for the presence of ALE pin in 8085, but not in 6800 is that

 8085 has 5 interrupts lines, whereas 6800 has only two
 None
 8085 has multiplexed bus, whereas 6800 does not have
 8085 uses I/O mapped I/O, whereas 6800 uses memory mapped I/O

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Microprocessor
Assertion(A): Address bus is unidirectional. Reason(R): Data bus is bidirectional

 A is true but R is false
 Both A & R are true but R is not the correct explanation of A
 Both A & R are true and R is the correct explanation of A
 A is false but R is true

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Microprocessor
It is possible to copy a file in the same directory.

False
True

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Microprocessor
The data bus of any microprocessor is always

 Bi-directional
 Unidirectional
 None
 Either unidirectional or bi-directional

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