Microprocessor
Bus Interface Unit (BIU) in 8086 performs the following functions:

 Instruction decoding.
 All the above.
 Arithmatic and Logic operations.
 Instruction fetch.

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Microprocessor
In 8085

P flag is reset when the result has even parity
P flag is set when the result has even parity
P flag is reset when the result has odd parity
P flag is set when the result has odd parity

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Microprocessor
DS directive in 8085

Forces the assembler to reserve one byte of memory
Forces the assembler to reserve a specified number of consecutive bytes in the memory
None of these
Forces the assembler to reserve a specified number of bytes in the memory

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Microprocessor
HLDA signal in 8085 performs the following operation:

 Indicates that another master is requesting the use of the address and data buses.
 Indicates that the CPU has not received the HOLD request.
 Indicates that the CPU has received the HOLD request and that it will relinquish the bus in the next clock cycle.
 Hold the data in the accumulator until the microprocessor is turned OFF.

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