Concept:CPU clock speed is the rate at which a processor executes instructions, measured in cycles per second.
Explanation:Clock speed indicates how many clock cycles a CPU can complete in one second.
It is measured in Hertz (
Hz), with modern processors operating in Gigahertz (
GHz).
One clock cycle represents a basic step of instruction processing.
Therefore, a higher clock speed allows the CPU to execute more instructions per second.
For instance, a
3.5Â GHz processor can complete
3.5 billion cycles every second.
However, overall CPU performance also depends on core count, architecture, and cache memory.
Multiple cores enable simultaneous instruction processing, improving multitasking.
Cache memory stores frequently used data for quick access, reducing delay.
So clock speed is an essential metric, but it alone does not determine total performance.
Answer:Clock speed measures the number of instructions executed per second.
Hence, option C is correct.