Practice Java.util.concurrent.atomic Package (23.6.1) - Java Memory Model and Thread Safety

Practice: java.util.concurrent.atomic Package

Lesson 23.6.1Java Memory Model and Thread Safety

Practise this section

9 questions

Flashcard drill
3 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 does the AtomicInteger class do?
Show hintHide hint
Think about operations that need to be safe in a multi-threaded context.
Question 2.
Name two classes in the java.util.concurrent.atomic package.
Show hintHide hint
Recall the classes that handle specific data types.
3Question 3.
What is the purpose of the java.util.concurrent.atomic package?
- To provide synchronized collections
- To offer lock-free operations on variables
- To manage memory efficiency
Show hintHide hint
Consider what 'lock-free' means in the context of threading.
4Question 4.
True or False: The compareAndSet() method guarantees that a variable will always be updated.
- True
- False
Show hintHide hint
Reflect on what 'compare' indicates about the operation.
Question 5.
Design a multi-threaded application to simulate a stock trading system where multiple traders can update their balances concurrently using AtomicInteger.
Show hintHide hint
Consider how transactions will be managed.
Question 6.
Create an application that tracks the number of visitors to a website using AtomicLong. Ensure that the counting is thread-safe as multiple requests come in at the same time.
Show hintHide hint
Focus on where the count needs to be updated.

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