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Microprocessor

Microprocessor
Temporary registers in 8085 are

 D and E.
 W and Z.
 B and C.
 H and L.

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Microprocessor
In 8086, _______ uses a mechanism known as an instruction stream queue to implement a pipeline architecture.

 None of these
 Bus Interface Unit (BIU)
 Execution Unit (EU)
 Both ‘b’ and ‘c’

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Microprocessor
Which general register or general register pair is incremented/decremented by 2 during PUSH and POP instructions?

 Program Counter.
 D-E.
 Stack Pointer.
 H-L.

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Microprocessor
PSW stands for

 accumulator contents
 flag byte
 accumulator and flag register contents
 none

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Microprocessor
Assuming LSB is at position 0 and MSB at position 7, which bit positions are not used (Undefined) in flag register of an 8085 microprocessor?

 1, 3, 4
 1, 3, 5
 1, 2, 5
 2, 3, 5

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Microprocessor
In an intel 8085A, which is the first machine cycle of an instruction?

 A memory write cycle
 An op-code fetch cycle
 An I/O read cycle
 A memory read cycle

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