Practice Atomic Variables (23.6) - Java Memory Model and Thread Safety

Practice: Atomic Variables

Lesson 23.6Java Memory Model and Thread Safety

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9 questions

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6 sample questions

Question 1.
What is an atomic variable?
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Think about what happens in a multi-threaded environment.
Question 2.
Name one class in the java.util.concurrent.atomic package.
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It's used to perform atomic operations on integers.
3Question 3.
What does the AtomicInteger's incrementAndGet() method do?
- Increments the value and returns the original value
- Increments the value and returns the new value
- Checks if the value is zero
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Pay attention to what the method returns.
4Question 4.
True or False: Atomic variables require explicit locking for thread safety.
- True
- False
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Think about the primary purpose of atomic variables.
Question 5.
Design a multithreaded application that counts how many times a particular word appears in a text file using AtomicInteger. Include error handling.
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Consider thread safety and how to best share your counter.
Question 6.
Explain why using an AtomicBoolean can lead to cleaner code compared to synchronized blocks for a simple stop flag.
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Think about the implications of shared state management.

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