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Microprocessor

Microprocessor
Which one of the following circuits transmits two messages simultaneously in one direction

 Diplex
 Simplex
 Quadruplex
 Duplex

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Microprocessor
Which general register or general register pair is incremented/decremented by 2 during PUSH and POP instructions?

 Stack Pointer.
 D-E.
 Program Counter.
 H-L.

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Microprocessor
The first machine cycle of an instruction is always

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

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Microprocessor
XCHG instruction exchanges the content of H-L with ______ register pair.

 PSW
 D-E
 B-C
 Stack Pointer

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Microprocessor
Total numbers of output pins in 8085 microprocessor are

 40
 13
 30
 27

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Microprocessor
The character set of Fortran 77 includes lower case alphabets a to z.

False
True

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