Total 420 Questions |
Updated On: Nov 18, 2024
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Question 1
Which of the following 3 DataFrame operations are NOT classified as an action? Choose 3 answers:
Answer: B,C,D
Question 2
When joining two dataframes, if there is a need to evaluate the keys in both of the DataFrames or tables and include all rows from the right DataFrame as well as any rows
in the left DataFrame that have a match in the righ DataFrame also If there is no equivalent row in the left DataFrame, we want to instert null: which join type we should
select ? df1.join(person, joinExpression, joinType)
Answer: A
Question 3
Which of the following 3 DataFrame operations are classified as a wide transformation ? Choose 3 answers:
Answer:
Question 4
Given the following statements regarding caching:
1. 1: The default storage level for a DataFrame is StorageLevel.MEMORY
2.
3. 2: The DataFrame class does have an unpersist() operation
4.
5. 3: The persist() method needs an action to load data from its source to materialize the DataFrame in cache
Which one is NOT TRUE ?
Answer: D
Question 5
Which of the following code blocks returns a DataFrame with approximately 1,000 rows from the 10,000-row
DataFrame itemsDf, without any duplicates, returning the same rows even if the code
block is run twice?
Answer: B
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Total 420 Questions |
Updated On: Nov 18, 2024
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