21.2.3. Channels

Try these first

1. 1.

   What is a channel in Java NIO?

   Hint

   Think about how data flows between devices.

2. 2.

   How do you create a FileChannel?

   Hint

   What class do we use for file access?

3. 3.

   What does a Channel in Java NIO represent?

   • A method for data processing
   • An open connection to an I/O entity
   • A class for reading data

   Hint

   Focus on what a channel connects in I/O.

4. 4.

   Which channel would you use for UDP communication?

   • FileChannel
   • SocketChannel
   • DatagramChannel

   Hint

   Think about the type of protocol used.

5. 5.

   Design a system where a SocketChannel needs to handle multiple client connections efficiently. Outline your design and explain how you would implement selectors to manage these connections.

   Hint

   Think about how the Selector can help manage multiple connections.

6. 6.

   Given a large file, devise a method using FileChannel to process only specific chunks of the file at a time. Explain your reasoning.

   Hint

   Consider the benefits of reading chunks instead of the whole file.