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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does AutoBoxing do?
💡 Hint: Think about what happens when you assign an int to an Integer.
Question 2
Easy
What is the opposite of AutoBoxing?
💡 Hint: Remember what happens when you retrieve a primitive from its wrapper.
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 is AutoBoxing?
- Converting an object to a primitive
- Converting a primitive to an object
- Neither of these
💡 Hint: Think about the direction of the conversion.
Question 2
True or False: UnBoxing can lead to a NullPointerException.
- True
- False
💡 Hint: Consider what happens when trying to access null.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Write a Java program that illustrates both AutoBoxing and UnBoxing processes while storing multiple primitive types in an ArrayList.
💡 Hint: Think about how you store numbers in ArrayLists and return them back as primitives.
Question 2
Discuss the potential risks of UnBoxing a null value in Java and provide code to demonstrate the issue.
💡 Hint: Think about what happens when you try to retrieve a primitive from a null wrapper.
Challenge and get performance evaluation