Practice Tools For Thread Safety In Java (20.4) - Java Memory Model and Thread Safety

Practice: Tools for Thread Safety in Java

Lesson 20.4Java Memory Model and Thread Safety

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10 questions

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4 cards from this section. Quick, good the night before a test.
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6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
4 questions · about 3 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is a synchronized method?
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Think of how it controls thread access.
Question 2.
What does a volatile variable do?
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Consider its effect on visibility.
3Question 3.
What do synchronized blocks ensure?
- Visibility
- Mutual exclusion
- Both
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Think about what synchronized means in a multithreaded context.
4Question 4.
A volatile variable guarantees that changes are visible immediately across threads. True or False?
- True
- False
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Consider the role of volatile in synchronization.
Question 5.
Create a Java program using synchronized blocks to solve a simple banking problem where two threads try to modify the same account balance simultaneously. Explain how it prevents race conditions.
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Consider the use of synchronized methods for balance checks.
Question 6.
Discuss how you would implement a multi-threaded application that counts the frequency of numbers in an array using atomic variables. Illustrate the code with proper thread management.
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Think about how each thread could increment the count.

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