Practice Unmodifiable And Synchronized Collections (4.2.2) - Java Collections Framework (Advanced

Practice: Unmodifiable and Synchronized Collections

Lesson 4.2.2Java Collections Framework (Advanced

Practise this section

9 questions

Flashcard drill
2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
What is the purpose of an unmodifiable collection?
Show hintHide hint
Think about data safety.
Question 2.
How do you create a synchronized list in Java?
Show hintHide hint
Look for the method that provides thread safety.
3Question 3.
What happens if you try to modify an unmodifiable list?
- No change occurs
- An UnsupportedOperationException is thrown
- The list is modified
Show hintHide hint
Think about the safety net of immutability.
4Question 4.
Synchronized collections ensure thread safety in collections.
- True
- False
Show hintHide hint
Recall the purpose of synchronization.
Question 5.
You are developing a multi-threaded application that manages user accounts. Describe how you would use synchronized collections to ensure safe access to account data.
Show hintHide hint
Consider protection mechanisms during critical operations.
Question 6.
Create a scenario where using an unmodifiable collection would prevent a serious bug. Provide code demonstrating this prevention.
Show hintHide hint
Think of application settings that should remain constant.

5 more questions in this section. Enroll free to practise them all.