Correct AnswerD. cause the output to assume a state dependent on the controlling (J-K or D) inputs
Quick Explanation
The clock determines when a flip-flop is permitted to update its state. At the active clock event, the next output is determined by its data/control inputs such as D or J-K. Thus the purpose described by option D is correct.
Detailed Explanation
Correct Answer
D — cause the output to assume a state dependent on the controlling (J-K or D) inputs
Concept and Reasoning
The clock determines when a flip-flop is permitted to update its state. At the active clock event, the next output is determined by its data/control inputs such as D or J-K. Thus the purpose described by option D is correct.
Calculation / Key Relation
Clock = timing event
control/data inputs determine Qnext
Exam Takeaway
Clock tells WHEN; inputs tell WHAT state.
Common Mistake
A clock pulse does not necessarily toggle, set or clear every flip-flop.
