21.6. Summary

Try these first

1. 1.

   What does I/O stand for?

   Hint

   Think about what happens when you read from or write to a file.

2. 2.

   Name one class from the java.io package.

   Hint

   Consider classes that help in reading data from files.

3. 3.

   What is one major benefit of using Java NIO over Java I/O?

   • Simplicity
   • Non-blocking I/O
   • Fewer classes

   Hint

   Think about performance under load.

4. 4.

   Java I/O can handle both byte and character streams.

   • True
   • False

   Hint

   Recall if there are separate classes for handling text and binary data.

5. 5.

   In a multi-threaded application, how would you implement file reading using Java NIO while ensuring non-blocking I/O?

   Hint

   Think about how channels connect buffers and use selectors for efficient I/O.

6. 6.

   Design a scenario where using Java I/O could lead to performance issues compared to Java NIO. Explain the issues encountered.

   Hint

   Consider how many threads would be required for various I/O operations.