20.2.2 - Visibility
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Practice Questions
Test your understanding with targeted questions
What Java keyword ensures that changes to a variable are visible across multiple threads?
💡 Hint: Think of a keyword that starts with 'v'.
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.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does the volatile keyword guarantee in Java?
💡 Hint: Think of what happens when a variable is marked as volatile.
True or False: Using synchronized methods can affect the visibility of instance variables.
💡 Hint: Consider how locks work in synchronization.
1 more question available
Challenge Problems
Push your limits with advanced challenges
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.
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.
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