Microprocessor
PUSH B instruction in 8085 microprocessor causes

 the contents of registers B & C to be transferred in the stack and and the registers get cleared
 the contents of register B & C to be copied in the stack
 the contents of register B only to be copied in the stack
 registers B & C to be cleared

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Microprocessor
The output data lines of microprocessor and memories are usually tristated because

 It increases the speed of data transfer over the data bus
 The data line can be multiplexed for both input and output
 More than one device can transmit information over the data bus by enabling only one device at a time
 More than one device can transmit over the data bus at the same time

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Microprocessor
In 8085

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

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