Microprocessor
Which one of the following instruction may be used to clear the accumulator content irrespective of its initial value?

 ORA A
 CLR A
 SUB A
 MOV A, 00H

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

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