Practice Comparator Interface - 15.8.2 | 15. Collections and Generics | Advanced Programming
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15.8.2 - Comparator Interface

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What is the purpose of the Comparator interface in Java?

💡 Hint: Think about when you'd need to sort items differently.

Question 2

Easy

What method do you need to implement in a Comparator?

💡 Hint: What are the two objects you compare?

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 Comparator interface allow you to do?

  • A. Sort objects naturally
  • B. Define custom ordering for objects
  • C. Force comparison between two objects
  • D. Merge multiple lists

💡 Hint: Think about what flexibility you need beyond natural ordering.

Question 2

True or False: A Comparator can only sort objects in increasing order.

  • True
  • False

💡 Hint: Consider how you could reverse the sorting order.

Solve 2 more questions and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

Create a Comparator for a class that represents products in a store. The Comparator should first compare products by price, and then by name if prices are the same.

💡 Hint: Think about the significance of each attribute when comparing.

Question 2

Imagine you have a data structure that needs to sort student records by GPA, and if two students have the same GPA, by last names. Design your solution using the Comparator interface.

💡 Hint: What condition checks will you need?

Challenge and get performance evaluation