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Microprocessor

Microprocessor
DMA is used between

 memory and I/O
 microprocessor and I/O
 none
 microprocessor and memory

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

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

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Microprocessor
Identify the non-maskable interrupt from the following

 RST 6.5
 RST 4.5
 RST 5.5
 RST 7.5

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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
 1, 3, 5
 1, 3, 4
 2, 3, 5

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Microprocessor
The clock speed of 8085 is

 3.2MHz.
 1KHz.
 3.2KHz.
 1MHz.

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Microprocessor
Total number of modes the 8253 can work

 8
 12
 6
 4

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