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?

 2, 3, 5
 1, 3, 4
 1, 2, 5
 1, 3, 5

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Microprocessor
Assertion(A): The frequency of 8085 system is ½ of the crystal frequency. Reason(R): Microprocessor (8085) requires a two phase clock.

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

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Microprocessor
The correct sequence of steps in the instruction cycle of a basic computer is

 Fetch, Execute, Decode and Read effective address.
 Fetch, Decode, Read effective address and, Execute.
 Fetch, Read effective address, Decode and Execute.
 Read effective address, Decode, Fetch and Execute.

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