Chapter 5

1. What's a stream?
   A stream is an abstraction that represents a generic flow of incoming or outgoing data.
2. What interfaces abstract the incoming streams?
   The io.Reader interface is an abstraction for incoming streams.
3. Which interface represents the outgoing streams?
   The io.Writer interface is an abstraction for outgoing streams.
4. When should a byte reader be used? When should a string reader be used instead?
   A byte reader should be used when the raw data is a slice of bytes, while a string reader should be used with strings. Converting from one type of data to another causes a copy and is inconvenient.
5. What's the difference between a string builder and a byte buffer?
   A byte buffer can be reused and overwritten. A string builder is used to create a string without a copy, so it uses a byte slice and converts it to a string without copying, using...