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Microprocessor

Microprocessor
Which of the following instruction is not possible in 8085?

 POP B
 POP PSW
 POP D
 POP 30 H

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Microprocessor
Consider the following statements: Arithmetic Logic Unit (ALU) 1.Performs arithmetic operations 2.Performs comparisons. 3.Communicates with I/O devices 4.Keeps watch on the system Which of these statements are correct?

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

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Microprocessor
The addressing mode in instruction PUSH B is

 direct
 immediate
 register
 register indirect

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Microprocessor
The data bus of any microprocessor is always

 Bi-directional
 Unidirectional
 None
 Either unidirectional or bi-directional

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Microprocessor
An I/O processor controls the flow of information between

Main memory and I/O devices
Cache and main memory
Cache memory and I/O devices
Two I/O devices

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Microprocessor
Which of the following pair of gates can form a latch?

A pair of cross copled AND
A pair of cross coupled NAND
A pair of cross coupled OR
A cross coupled NAND/OR

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