Question
A CPU accesses 100 program instructions. Each memory access takes 5 nanoseconds (ns, or billionths of a second). All 100 instructions are in memory. What is the total time in ns?
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Answered by
GPT-4o mini
To calculate the total time it takes for the CPU to access 100 program instructions, we can follow these steps:
1. Each memory access takes 5 nanoseconds.
2. The CPU accesses 100 instructions.
Now, we multiply the number of instructions by the time taken for each access:
\[
\text{Total time} = \text{Number of instructions} \times \text{Time per access}
\]
\[
\text{Total time} = 100 \text{ instructions} \times 5 \text{ ns/instruction} = 500 \text{ ns}
\]
Thus, the total time for the CPU to access 100 instructions is **500 nanoseconds (ns)**.
1. Each memory access takes 5 nanoseconds.
2. The CPU accesses 100 instructions.
Now, we multiply the number of instructions by the time taken for each access:
\[
\text{Total time} = \text{Number of instructions} \times \text{Time per access}
\]
\[
\text{Total time} = 100 \text{ instructions} \times 5 \text{ ns/instruction} = 500 \text{ ns}
\]
Thus, the total time for the CPU to access 100 instructions is **500 nanoseconds (ns)**.
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