Microprocessor
When referring to instruction words, a mnemonic is

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

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Microprocessor
Assertion(A): Segment override prefix (SOP) is used when a default offset register is not used with its default base segment register but with a different base register. Reason(R): The offset registers IP and SP can never be associated with any other segment registers apart from their respective default segments.

 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
Ready pin of microprocessor is used

 to indicate that microprocessor is ready to receive outputs
 to introduce wait state
 to provide direct memory access
 to indicate that microprocessor is ready to receive inputs

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