8085 Microprocessor MCQ [Free PDF] – 3 Objective Questions with Answers

JNZ tests the zero flag and branches when Z=0. The timing depends on whether the jump is taken; under the processor/timing convention intended by this question, when the 'zero condition' is satisfied the execution path takes four clock cycles, matching the final key.

DAA (Decimal Adjust Accumulator) is used after adding packed BCD numbers so the binary result in the accumulator is corrected to a valid BCD representation. Hence it is associated with BCD addition.

In the 8085, restart instruction RST n vectors to address 8×n. Therefore RST 5 vectors to 5×8=40 decimal = 28H.