Practice Stream API and Collections - 4.7 | 4. Java Collections Framework (Advanced | Advance Programming In Java
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4.7 - Stream API and Collections

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What method do you use to collect stream results into a list?

💡 Hint: Think about the main operation associated with gathering items from a stream.

Question 2

Easy

Which collector would you use to split a list into two categories?

💡 Hint: This collector takes a predicate to divide data.

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 main purpose of the Stream API?

  • Perform operations on collections
  • Replace all loops
  • Increase compilation speed

💡 Hint: Think about the primary reason for its introduction into Java.

Question 2

True or False: Collectors can partition a stream into multiple groups.

  • True
  • False

💡 Hint: Recall the definition of partitioning in the context of streams.

Solve 1 more question and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

Write a Java program that takes a list of employees and partitions them into two lists based on salary, one for employees earning above average and one for those below.

💡 Hint: Look at how you can calculate averages and apply them as conditions in partitioning.

Question 2

Construct a method that reads a list of words and returns a list of unique lengths of those words using the Stream API.

💡 Hint: Think about how you can transform each word before collecting it into a list.

Challenge and get performance evaluation