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, 5
 1, 3, 4
 1, 2, 5
 2, 3, 5

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Microprocessor
How can we make any bit of a register “0”?

 AND that bit with “1” and remaining bits with “0”.
 OR that bit with “0” and remaining bits with “1”.
 OR that bit with “1” and remaining bits with “0”.
 AND that bit with “0” and remaining bits with “1”.

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Microprocessor
ALU (Arithmetic and Logic Unit ) of 8085 microprocessor consists of

 Accumulator, temporary register, arithmetic and logic circuits
 Accumulator, temporary register, arithmetic, logic circuits and five flags
 Accumulator, arithmetic, logic circuits and five flags
 Accumulator, arithmetic and logic circuits

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