What happens to the input stream in non-repeatable streams?

In the context of non-repeatable input streams, the defining characteristic is that the data can only be read a single time. Once the stream is read, its position advances, and further attempts to read from the stream will not yield the same data. This behavior is typical in various data handling scenarios, such as reading from files or network responses where the data is consumed as it is processed.

When working with a non-repeatable stream, any consumption of the stream's data results in the loss of that data from the stream. This makes it important for developers to design their applications considering how they will access and process the information. For instance, if the data needs to be accessed again, it must be stored or fetched anew, as the original input stream no longer contains the data after the first read.

The other options suggest characteristics that do not apply to non-repeatable streams. For instance, caching, the ability to read multiple times, or permanent storage do not align with the fundamental nature of non-repeatable streams, reinforcing the understanding that these streams are designed primarily for a single-pass read operation.