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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the purpose of jstat?
💡 Hint: Think about what kind of data we need to ensure the JVM is functioning well.
Question 2
Easy
How do you use jmap to generate a heap dump?
💡 Hint: Consider how we might analyze memory allocation.
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 jmap command do?
- Generates thread stack traces
- Creates memory maps and heap dumps
- Displays current JVM statistics
💡 Hint: Think about the tool that's most closely related to memory analysis.
Question 2
True or False: jstat only works with the latest Java versions.
- True
- False
💡 Hint: Consider how long the tools have been part of the Java ecosystem.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
You have a Java application that is running slowly. Use the appropriate command-line tools to identify potential causes of performance issues. Discuss your approach.
💡 Hint: Think sequentially about diagnosing performance: start with stats, dive into memory, then examine threads.
Question 2
Your application is throwing OutOfMemoryErrors. How would you use jmap and jcmd to investigate and solve the problem?
💡 Hint: Focus on understanding the state of memory at the time of the error.
Challenge and get performance evaluation