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Microprocessor

Microprocessor
A field programmable ROM is called

 FPROM
 PROM
 MROM
 FROM

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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

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

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Microprocessor
While CMP B instruction executes,

 only carry and zero flags will be affected.
 all flags will be affected.
 no flags will be affected.
 only carry flag will be affected.

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Microprocessor
Which one of the following instruction may be used to clear the accumulator content irrespective of its initial value?

 ORA A
 MOV A, 00H
 CLR A
 SUB A

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Microprocessor
In microprocessor based system DMA refers to

 direct memory access for the I/O device
 direct memory access for the user
None of these
 direct memory access for microprocessor

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Microprocessor
During the execution of the instruction, the ________tests the status and control flags and updates them based on the results of executing the instruction.

 Bus Interface Unit (BIU)
 None of these
 Both ‘c’ and ‘d’
 Execution Unit (EU)

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