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Microprocessor

Microprocessor
DMA is used between

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

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Microprocessor
Maximum of how many devices can be connected simultaneously to the microprocessor via 8257 in DMA data transfer mode?

 4
 6
 10
 8

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Microprocessor
A combinational PLD with a programmable AND array and a programmable OR array is called a

 PAL
 PROM
 PLD
 PLA

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Microprocessor
The 8085 microprocessor enters into bus idle machine cycle whenever

 DAD RP instruction is executed
 RST 7.5 is recognized
None of these
 INTR interrupt is recognized

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Microprocessor
In order to save accumulator value on the stack, which of the following instruction may be used

 PUSH A
 POP PSW
 PUSH PSW
 PUSH SP

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Microprocessor
Let the content of accumulator and register B be 0000 0100 and 0100 0000 respectively before execution of instruction SUB B. The content of accumulator after the execution of this instruction will be

 11000100
 01000000
 00000100
 010001000

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