Microprocessor
In a microcomputer , the address of memory locations are binary numbers that identify each memory circuit where a byte is stored. If a microcomputer uses 20-bit address, then numbers of different memory locations are

 220 - 1
 20
 220
 220-1

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Microprocessor
The correct sequence of steps in the instruction cycle of a basic computer is

 Fetch, Read effective address, Decode and Execute.
 Fetch, Decode, Read effective address and, Execute.
 Fetch, Execute, Decode and Read effective address.
 Read effective address, Decode, Fetch and Execute.

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

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

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Microprocessor
The stack pointer register in a microprocessor

 counts the number of programs being executing on the microprocessor
 counts the number of instructions being executing on the microprocessor
 holds the address of the top of the stack
 keeps the address of the next instruction to be fetched

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