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Microprocessor

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

 Duplex
 Simplex
 Diplex
 Quadruplex

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Microprocessor
Which one of the following ICs is used to interface keyboard and display?

 8253
 8259
 8251
 8279

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Microprocessor
How many 16-bit special purpose registers are present in 8085 microprocessor?

 6
 8
 2
 16

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Microprocessor
Which one of the following statement is false?

 A microprocessor has bi-directional address bus
 A microprocessor has unidirectional address bus
 A microprocessor has bi-directional data bus
 A microprocessor has an ALU

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Microprocessor
A microprocessor differentiates between op code, data/address at any time by

 the sequence in which memory contents are fetched by it
 the program counter
 the stack pointer
 its internal registers

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Microprocessor
Because we wish to allow each ASCII code to occupy one location in memory, most memories are __________ addressable.

BYTE
NIBBLE
WORD (16 bits)
DOUBLEWORD (32 bits)

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