Practice Best Practices (6.9) - Generics and Type Inference - Advance Programming In Java

Practice: Best Practices

Lesson 6.9Generics 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 is the benefit of using generics in collections?
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Think about errors that might happen at runtime.
Question 2.
What does a bounded type do?
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What type constraints do you recall?
3Question 3.
Why should you avoid raw types like List?
- It is not allowed in Java
- They risk runtime exceptions
- They are outdated
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Consider what problems arise when you mix types.
4Question 4.
True or False: Wildcards can provide a way to handle multiple types in generics.
- True
- False
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Think about methods that take lists of various data types.
Question 5.
Implement a generic class that adds three different types of numbers, while ensuring type safety during addition. Include methods to return the total and the average of those three numbers.
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Think about how to ensure the types are compatible for arithmetic operations.
Question 6.
Write a method that takes a List of a bounded type and calculates the maximum value. Ensure it runs on any numeric type.
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Remember to utilize a loop and compare values.

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