For a memory system, the cycle time is

The correct answer is: B. longer than the access time

The cycle time is the minimum amount of time it takes for a memory system to complete one read or write operation. The access time is the time it takes for the memory system to read or write a single bit of data. The cycle time is always longer than the access time because it includes the time it takes for the memory system to perform other operations, such as refreshing the memory cells.

Here is a brief explanation of each option:

• Option A: The cycle time is the same as the access time. This is not correct because the cycle time is always longer than the access time.
• Option B: The cycle time is longer than the access time. This is the correct answer.
• Option C: The cycle time is shorter than the access time. This is not correct because the cycle time is always longer than the access time.
• Option D: The cycle time is a submultiple of the access time. This is not correct because the cycle time is always longer than the access time.
• Option E: None of the above. This is not correct because option B is the correct answer.