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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does the collect() action do?
💡 Hint: Think about how you would gather all the items from a collection.
Question 2
Easy
True or False: Transformations execute immediately when called.
💡 Hint: Remember the difference between laziness and eagerness in Spark.
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 action count() do?
- Counts the number of elements in an RDD.
- Retrieves all elements in an RDD.
- Saves an RDD to text files.
💡 Hint: Think about what you want to know about the items in your collection.
Question 2
True or False: The collect() action is the safest way to retrieve data from a large RDD.
- True
- False
💡 Hint: Consider what can happen if you try to fit too much data into a small space.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
You have a large dataset of user transactions in an RDD and need to find the total number of transactions and save the result to a file. How would you accomplish this?
💡 Hint: Think about the sequence you need to follow and how you would combine actions.
Question 2
Describe a scenario where failing to understand the distinction between actions and transformations could lead to performance issues.
💡 Hint: Consider the implications of retrieving large amounts of data at once.
Challenge and get performance evaluation