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Microprocessor

Microprocessor
The five flags in 8085 are designated as

Z, CY, S, P and AC
D, Z, S, P, AC
Z, C, S, P, AC
Z, CY, S, D, AC

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Microprocessor
The microprocessor issues ALE during first T-state of

 memory READ cycle only
 fetch cycle only
 every machine cycle
 memory WRITE cycle only

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Microprocessor
If the sign bit of mantissa is 0 and the exponent is increased from a positive to a more negative number the result is

A larger floating point number
Either A or B depending on the actual number
A smaller floating point number
A negative floating point number

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Microprocessor
S0 and S1 pins are used for

 serial communication
 indicating the processor’s status
 acknowledging the interrupt
None of these

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Microprocessor
Using DeMorgan’s Theorem we can convert any AND-OR structure into

OR-NAND
NAND-NAND
NOR-NAND
NAND-NOR

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

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