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Microprocessor

Microprocessor
The five flags in 8085 are designated as

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

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Microprocessor
In a computer the data transfer between hard disk and CPU is nearly the same as that between diskette and CPU.

False
True

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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

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

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Microprocessor
Number of Hex digits needed to represent the 20-bit address of a memory location are

 16
 5
 20
 4

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

 POP B
 POP PSW
 POP 30 H
 POP D

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Microprocessor
The first machine cycle of an instruction is always

 A fetch cycle
 An I/O read cycle
 A memory read cycle
 A memory write cycle

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