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21.2.4. Selectors
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3 cards from this lesson. Good the night before a test.
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- 1.
What is a selector in Java NIO?
Hint
Think about how it improves resource usage.
- 2.
Name one reason why non-blocking I/O is beneficial.
Hint
Consider how this affects application performance.
- 3.
What do selectors allow in Java NIO?
- Handling only one channel at a time
- Monitoring multiple channels with a single thread
- Blocking I/O operations
Hint
Consider how this impacts server performance.
- 4.
True or False: Selectors block the application from executing while waiting for I/O.
- True
- False
Hint
Focus on the purpose of non-blocking I/O.
- 5.
Design a chat server using Java NIO selectors to handle multiple clients. Explain how you would manage incoming messages and connections.
Hint
Consider how you would establish communication between various clients efficiently.
- 6.
Describe the performance implications of using selectors over traditional blocking I/O techniques in a server application.
Hint
Think about how a fewer number of threads influence server load and responsiveness.
Exercises
Total Questions
2
Estimated Time
4 min
Passing Score
70%
Instructions
- Read each question carefully
- You can use hints if you need help
- Complete all questions before submitting
4 more questions available
Enrol freeQuiz
Total Questions
2
Estimated Time
4 min
Passing Score
70%
Instructions
- Read each question carefully
- You can use hints if you need help
- Complete all questions before submitting
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Enrol freeChallenge Problems
Total Questions
2
Estimated Time
4 min
Passing Score
70%
Instructions
- Read each question carefully
- You can use hints if you need help
- Complete all questions before submitting