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Microprocessor

Microprocessor
How many machine cycles are required for execution of IN 30H instruction

 6
 3
 4
 5

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Microprocessor
When any data transfer instruction, to transfer the data from memory to microprocessor, is executed the condition flags are

 always set
 not affected
 affected indicating specific conditions
 always reset

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Microprocessor
The 8085 microprocessor enters into bus idle machine cycle whenever

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

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Microprocessor
SUB A instruction in 8085

 reset carry and sign flags
 sets zero and sign flags
 reset zero and parity flags
 sets zero and carry flags

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

 8253
 8279
 8251
 8259

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Microprocessor
Which components are NOT found on chip in a microprocessor but may be found on chip in a microcontroller?

 EPROM, USART & PORTS
 EPROM & PORTS
 SRAM & USART
 SRAM, EPROM & PORTS

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