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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does a bounded wildcard in Java signify?
💡 Hint: Think about the terms 'extends' and 'super'.
Question 2
Easy
Explain how type erasure impacts generics in Java.
💡 Hint: Consider what happens during the compilation of generic code.
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 wildcard List<? extends Number> indicate?
- It allows any Number type
- It only allows Integer type
- It restricts to superclasses of Number
💡 Hint: Think about the meaning of 'extends'.
Question 2
True or False: Type erasure keeps all type parameters intact in compiled Java code.
- True
- False
💡 Hint: Consider what happens in older Java versions.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Explain a scenario where using bounded wildcards can prevent potential runtime errors. Provide code samples for clarity.
💡 Hint: Consider data integrity in statistical applications.
Question 2
Develop a method utilizing lower bounded wildcards that allows adding different shapes to a list. Explain the significance of this approach.
💡 Hint: Think about object-oriented programming and polymorphism.
Challenge and get performance evaluation