Practice Shared Variables and Main Memory - 20.2.1 | 20. Java Memory Model and Thread Safety | Advance Programming In Java
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20.2.1 - Shared Variables and Main Memory

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What is the purpose of the volatile keyword?

💡 Hint: Think about how changes propagate across threads.

Question 2

Easy

What occurs if two threads access a shared variable without synchronization?

💡 Hint: Consider what happens if both modify the variable simultaneously.

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 happens if a variable is not marked volatile or synchronized in a multithreaded environment?

  • Variables are always visible to other threads
  • Changes may not be seen by other threads
  • Synchronization is unnecessary

💡 Hint: Think about thread interaction with memory.

Question 2

Is the following statement True or False? 'Using volatile ensures the atomicity of operations on a variable.'

  • True
  • False

💡 Hint: What do we mean by atomicity in operations?

Solve and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

You have a scenario where multiple threads are updating a shared counter and you notice inconsistent results. How would you design a solution using both volatile and synchronized blocks effectively?

💡 Hint: Consider how many threads will attempt to change the counter.

Question 2

Design a simple producer-consumer problem using shared variables, highlighting where you would use synchronization.

💡 Hint: Think about how the buffer's access is controlled.

Challenge and get performance evaluation