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Microprocessor

Microprocessor
Of the following circuits, the one which involves storage is

Mux
Decoder
Nand
RS Latch

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Microprocessor
Pick up the programmable interrupt controller from the following

 8259
 8275
 8257
 8279

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

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Microprocessor
While STC instruction executes,

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

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Microprocessor
Maximum of how many devices can be connected simultaneously to the microprocessor via 8257 in DMA data transfer mode?

 4
 10
 6
 8

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Microprocessor
The data bus of any microprocessor is always

 Unidirectional
 None
 Either unidirectional or bi-directional
 Bi-directional

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