Discussion
Which of the following is not expected from a clock pulse in CPU ?
Answer: A
The statement not expected of the clock is It is not applied to all registers.
In a synchronous CPU, the clock pulses are applied to all registers and flip-flops in the system. Whether a register actually changes on a given pulse is decided by its control signals, such as load or increment enable.
The other options describe what the clock does: it changes register states as the control signals require, it synchronises the activities of the system, and it triggers loading of data into registers or transfers between them.
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