Microprocessor
The first machine cycle of an instruction is always

 A fetch cycle
 An I/O read cycle
 A memory write cycle
 A memory read cycle

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Microprocessor
When referring to instruction words, a mnemonic is

 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.
 a short abbreviation for the operand address.

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

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

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