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Microprocessor

Microprocessor
An 8-bit microprocessor can have ………….. address lines.

 cannot be predicted
 16
 32
 8

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Microprocessor
Inintel 8085A microprocessor ALE signal is made high to

 To disable data bus
 To latch data D0-D7 from data bus
 To achieve all the functions listed above
 Enable the data bus to be used as low order address bus

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Microprocessor
The register which holds the information about the nature of results of arithmetic and logic operations is called as

 Process status register
 Flag register
 Condition code register
 Accumulator

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Microprocessor
The program counter in a 8085 micro-processor is a 16-bit register, because

 There are 16 address lines
 It has to fetch two 8-bit data at a time
 It counts 16-bits at a time
 It facilitates the user storing 16-bit data temporarily

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

 8251
 8253
 8279
 8259

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Microprocessor
Length of the instruction POP D is

 4 byte
 1 byte
 3 byte
 2 byte

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