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Microprocessor

Microprocessor
Total number of modes the 8253 can work

 6
 8
 4
 12

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Microprocessor
A microprocessor without the interrupt facility

 is best suited for process control system
 cannot be used for DMA operation
 is not useful for process control system
 cannot be interfaced with any I/O devices

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Microprocessor
Which of the data transfer is not possible in microprocessor

 accumulator to memory
 memory to memory
 memory to accumulator
 I/O device to accumulator

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Microprocessor
In microprocessor based system DMA refers to

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

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Microprocessor
During which T-state, contents of OP code from memory are loaded into IR (Instruction Register)?

 T3 OP code fetch
 T2 OP code fetch
 T1 OP code fetch
 T4 OP code fetch

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Microprocessor
The frequency of the driving network connected between pins 1 and 2 of 8085 microprocessor is

 four times the desired frequency
 twice the desired frequency
None of these
 equal to the desired frequency

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