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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is a wrapper class in Java?
💡 Hint: Consider how primitives are limited in their capabilities.
Question 2
Easy
What method would you use to convert a String to an int?
💡 Hint: Think of what you would do with user input.
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 the Java wrapper class for the primitive type 'int'?
- Integer
- Int
- Number
- Short
💡 Hint: Think of how you represent whole numbers in Java.
Question 2
AutoBoxing refers to what?
- True
- False
💡 Hint: Consider conversion and what happens automatically in Java.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Create a Java code snippet that demonstrates AutoBoxing with an ArrayList. What would the output be when retrieving the value?
💡 Hint: Think about how Java handles objects in collections vs. primitives.
Question 2
Discuss a scenario where using a wrapper class is necessary, providing a specific example of method usage.
💡 Hint: Consider the differences between primitive storage and object storage.
Challenge and get performance evaluation