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Microprocessor

Microprocessor
In order to complement the lower nibble of accumulator one can use

 ORI 0FH
 CMA
 XRI 0FH
 ANI 0FH

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Microprocessor
Consider the following registers: 1. Accumulator and flag register 2. B and C register 3. D and E register 4. H and L register Which of these 8-bit registers of 8085 microprocessor can be paired together to make a 16-bit register?

 1, 2 and 3
 1, 3 and 4
 1, 2 and 4
 2, 3 and 4

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Microprocessor
The clock speed of 8085 is

 3.2MHz.
 1MHz.
 1KHz.
 3.2KHz.

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Microprocessor
Assertion(A): Address bus is unidirectional. Reason(R): Data bus is bidirectional

 Both A & R are true and R is the correct explanation of A
 A is false but R is true
 A is true but R is false
 Both A & R are true but R is not the correct explanation of A

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Microprocessor
Output of the assembler in machine codes is referred to as

 Object program
 Source program
 Symbolic addressing
 Macroinstruction

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Microprocessor
DMA signal/signals in 8085 is/are

 All.
 HLDA.
 READY.
 HOLD.

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