Practice Visibility - 20.2.2 | 20. Java Memory Model and Thread Safety | Advance Programming In Java
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20.2.2 - Visibility

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What Java keyword ensures that changes to a variable are visible across multiple threads?

💡 Hint: Think of a keyword that starts with 'v'.

Question 2

Easy

What is the main problem if a variable is not declared volatile in a multithreading context?

💡 Hint: Consider what happens when threads work with copies of data.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What does the volatile keyword guarantee in Java?

  • It prevents all memory leaks
  • It makes a variable accessible to all threads
  • It ensures visibility of changes across threads

💡 Hint: Think of what happens when a variable is marked as volatile.

Question 2

True or False: Using synchronized methods can affect the visibility of instance variables.

  • True
  • False

💡 Hint: Consider how locks work in synchronization.

Solve 1 more question and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

Consider a multithreaded application where a boolean global variable controls a thread's execution. Design a simple code snippet that demonstrates both visibility issues and fixes using volatile.

💡 Hint: Reflect on how the variable interacts with multiple threads.

Question 2

Write a scenario involving two threads that demonstrate a race condition due to improper visibility practices and suggest a solution.

💡 Hint: Think about how simultaneous access could lead to errors.

Challenge and get performance evaluation