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

 More than one device can transmit over the data bus at the same time
 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

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Microprocessor
Which of the following statements for intel 8085 is correct?

 PC specifies the number of instructions executed so far
 PC specifies the address of the instruction being executed
 PC specifies the address of the instruction to be executed
 Program Counter (PC) specifies the address of the instruction last executed

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Microprocessor
Assertion (A): Negative values of incremental operator in DO loop are allowed in Fortran 77 but not in earlier versions of Fortran. Reason (R): Fortran 77 has better array facilities than earlier versions of Fortran.

Both A and R are correct but R is not correct explanation of A
Both A and R are correct and R is correct explanation of A
A is correct R is wrong
A is wrong R is correct

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