Microprocessor
In an intel 8085A, which is the first machine cycle of an instruction?

 An op-code fetch cycle
 A memory write cycle
 An I/O read cycle
 A memory read cycle

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Microprocessor
When referring to instruction words, a mnemonic is

 shorthand for machine language.
 a short abbreviation for the operation to be performed.
 a short abbreviation for the data word stored at the operand address.
 a short abbreviation for the operand address.

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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.

A is correct R is wrong
A is wrong R is correct
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

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Microprocessor
Which one of the following is not correct?

 Bus is a group of wires
 An instruction is a set of bits that defines a computer operation
 An interrupt signal is required at the start of every program
 Bootstrap is a technique or device for loading first instruction

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