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Microprocessor

Microprocessor
In order to save accumulator value on the stack, which of the following instruction may be used

 PUSH PSW
 POP PSW
 PUSH A
 PUSH SP

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Microprocessor
While STC instruction executes,

 no flags will be affected.
 only carry flag will be affected.
 only carry and zero flags will be affected.
 all flags will be affected.

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Microprocessor
Which of the following is a valid integer constant?

127
125 + 3
127
127

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Microprocessor
In an 8085 microprocessor based system, the contents of SP are 1000H, PUSH B instruction will transfer the contents of registers B & C respectively for memory locations

 1000 H and 0FFF H
 0FFF H and 0FFE H
 0FFE H and 0FFF H
 1000 H and 1001 H

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Microprocessor
PSW stands for

 accumulator and flag register contents
 none
 flag byte
 accumulator contents

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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
 20
 220 - 1
 220-1

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