Practice Class And Code Optimization Tips (28.8) - JVM Internals and Performance Tuning

Practice: Class and Code Optimization Tips

Lesson 28.8JVM Internals and Performance Tuning

Practise this section

9 questions

Flashcard drill
2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
What are primitive types?
Show hintHide hint
Think of the foundational data types in Java.
Question 2.
Why should we avoid excessive object creation?
Show hintHide hint
Consider how Java manages memory.
3Question 3.
Why should you prefer primitive types over wrapper classes?
- They use less memory
- They are easier to read
- They support only integers
Show hintHide hint
Think about memory usage in applications.
4Question 4.
True or False: Using synchronized methods are always the best choice for thread management.
- True
- False
Show hintHide hint
Consider scenarios where flexibility is needed.
Question 5.
Implement a simple Java application that demonstrates effective use of string concatenation with StringBuilder in a loop. Include optimizations in object management and caching techniques.
Show hintHide hint
Consider how to reduce the number of string objects created.
Question 6.
Create a multi-threaded application utilizing thread pools and ReentrantLock. Ensure it handles concurrent modifications correctly while optimizing performance.
Show hintHide hint
Think about how to handle shared data safely in a fast-paced environment.

5 more questions in this section. Enroll free to practise them all.