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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
 PUSH A
 PUSH SP
 POP PSW

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Microprocessor
SUB A instruction in 8085

 sets zero and sign flags
 reset zero and parity flags
 reset carry and sign flags
 sets zero and carry flags

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Microprocessor
In microprocessor based system I/O ports are used to interface

 all the I/O devices
 the O/P devices only
 the I/O devices and memory chips
 the I/P device only

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Microprocessor
Each instruction in an assembly language program has the following fields 1. Label field 2. Mnemonic field 3. Operand field 4. Comment field What are the correct sequence of these fields?

 2, 4, 1 and 3
 1, 2, 3 and 4
 2, 1, 4 and 3
 1, 3, 2 and 4

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Microprocessor
The number of output pins in 8085 microprocessors are

 40.
 19.
 21.
 27.

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Microprocessor
In a C expression using assignment operators, relational operators and arithmetic operators, the hierarchy of operations (in the absence of parenthesis) is

Arithmetic, relational, assignment
Arithmetic, assignment, relational
Relational, assignment, arithmetic
Assignment, relational, arithmetic

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