Which statement describes non-repeatable streams?

• A. The input stream is only read once
• B. The input stream can be read multiple times
• C. The input stream is cached in memory
• D. The input stream is always serialized

Answer: (A)

Non-repeatable streams are read in a single pass; once you’ve consumed the data, you can’t rewind and read it again unless you’ve already stored or buffered it somewhere. That makes the statement “The input stream is only read once” the best description. If a stream could be read multiple times, that would be a repeatable stream, which isn’t what non-repeatable means. Caching in memory could enable re-reading, but it’s an implementation detail to achieve repeatability, not the inherent behavior. Serialization is unrelated to whether a stream is repeatable.