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

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

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Microprocessor
When referring to instruction words, a mnemonic is

 a short abbreviation for the data word stored at the operand address.
 shorthand for machine language.
 a short abbreviation for the operand address.
 a short abbreviation for the operation to be performed.

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

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

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