Practice Bounded Type Parameters (6.5) - Generics and Type Inference - Advance Programming In Java

Practice: Bounded Type Parameters

Lesson 6.5Generics and Type Inference

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9 questions

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

Question 1.
What does 'T extends Number' signify in a generic class?
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Think about what types can be subclassed from Number!
Question 2.
Is it possible to instantiate a Stats class with String as a parameter?
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Consider the restrictions imposed by 'extends'.
3Question 3.
What is the purpose of bounded type parameters in Java?
- To allow any type to be used
- To restrict types to a certain base class
- To increase flexibility
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Think about what 'extends' means in a class definition.
4Question 4.
True or False: A list of type List can be used as a parameter for a method defined with a bounded type parameter 'T extends Number'.
- True
- False
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Consider the rules of inheritance.
Question 5.
Create a generic class that accepts numbers representing different statistical measures (mean, median, mode) and implements methods to compute each measure.
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Consider what methods are available on Number classes.
Question 6.
Imagine you are modeling a library system where books might be of different types. Can you create a generic solution that works for any type of Media, but ensures that only media classes are allowed?
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Think about how you could apply constraints effectively.

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