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Garbage Collection interview questions

Generational GC

24 questions with answers and explanations · 24 flashcards

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Questions

  1. Which tool can you use to analyze heap dumps in Java?Multiple choiceEasy
  2. In a Generational Garbage Collector, what triggers an object to move from the Young Generation to the Old Generation?Multiple choiceHard
  3. Why does Generational Garbage Collection help in practice?Multiple choiceMedium
  4. In the context of the Weak Generational Hypothesis, which statement is true about object lifespans?Multiple choiceMedium
  5. Why might a Java application experience increased garbage collection times during high traffic?Multiple choiceHard
  6. Which Java tool is used to capture a thread dump?Multiple choiceEasy
  7. How does the G1 Garbage Collector differ from traditional Generational Garbage Collection?Multiple choiceHard
  8. Which of the following best describes the Young Generation in Java's memory model?Multiple choiceMedium
  9. What triggers an object promotion from the Young Generation to the Old Generation?Multiple choiceMedium
  10. What does the 'jmap -heap' command display?Multiple choiceMedium
  11. How does the G1 Garbage Collector optimize handling of large heaps in contrast to traditional generational collectors?Multiple choiceHard
  12. Which garbage collector is designed to minimize latency by reducing 'Stop-The-World' pauses?Multiple choiceMedium
  13. Why does the Young Generation in Java's garbage collection matter in this design?Multiple choiceEasy
  14. Which JVM tool can you use to capture a heap dump for analysis?Multiple choiceEasy
  15. What defines an 'unreachable' object in the context of Java garbage collection?Multiple choiceEasy
  16. Why does the Old Generation in Java's memory model matter in practice?Multiple choiceEasy
  17. Which part of the JVM memory model is most affected by high object churn in an e-commerce application during Black Friday?Multiple choiceMedium
  18. What happens to objects in the Young Generation during a Minor GC in Java?Multiple choiceEasy
  19. How does Java's HotSpot VM determine if an object is unreachable?Multiple choiceMedium
  20. In Java, what is a common cause for increased full GC frequency during high traffic periods?Multiple choiceMedium
  21. How would you explain a 'Stop-The-World' pause in Java garbage collection in an interview?Multiple choiceMedium
  22. How would you explain a key reason for Stop-The-World pauses during garbage collection in an interview?Multiple choiceHard
  23. What does the Weak Generational Hypothesis suggest about object lifespan in Java?Multiple choiceMedium
  24. Why might the ZGC be preferred over G1GC for applications requiring ultra-low latency?Multiple choiceHard