Practice Grouping and Partitioning - 4.7.2 | 4. Java Collections Framework (Advanced | Advance Programming In Java
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4.7.2 - Grouping and Partitioning

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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 group elements in a collection?

💡 Hint: Think about the class that helps collect stream results.

Question 2

Easy

Which method separates a collection into two categories based on a condition?

💡 Hint: This method uses a two-way split.

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 purpose of Collectors.groupingBy()?

  • To filter data
  • To group data by a key
  • To sort data

💡 Hint: Think about how you would organize your files.

Question 2

True or False: Partitioning creates a single collection with duplicate elements.

  • True
  • False

💡 Hint: Consider what happens to elements when separated.

Solve 2 more questions and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

Write a program that reads a list of integers and partitions them into even and odd numbers. Then group the odd numbers by their length when expressed as strings.

💡 Hint: Use lambda expressions for conditions.

Question 2

Imagine you are analyzing survey results where respondents can select multiple answers. Write code to group the respondents by their selected categories and then partition those who selected more than one category from those who selected only one.

💡 Hint: Consider how you might store a respondent's answers.

Challenge and get performance evaluation