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Microprocessor

Microprocessor
Which one of the following microprocessor has 16-bit data bus?

 8085
 68000
 6502
 Z-80

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Microprocessor
Let the content of register C be 00000000 before the instruction DCR C is executed. The content of register C after the after the execution of this instruction will be

 00000001
 11111111
 None
 00000000

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Microprocessor
Assuming LSB is at position 0 and MSB at position 7, which bit positions are not used (Undefined) in flag register of an 8085 microprocessor?

 1, 2, 5
 2, 3, 5
 1, 3, 4
 1, 3, 5

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

 B-C
 Stack Pointer
 PSW
 D-E

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

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

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Microprocessor
In 8085 name/names of the 16 bit registers is/are

 program counter.
 both A and B.
 stack pointer.
 none of these.

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