Microprocessor
At the beginning of a fetch cycle, the contents of the program counter are

 transferred to address bus.
 transferred to memory data register.
 transferred to memory address register .
 incremented by one.

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Microprocessor
How can we make any bit of a register “1”?

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

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