Databricks Certified Associate Developer For Apache Spark 30 · Free Practice Question Medium
Question 16
The code block shown below should return a new DataFrame with 25 percent of random records from dataframe df without replacement. Choose the response that correctly fills in the numbered blanks within the code block to complete this task.
Code block:
df._1_(_2_, _3_, _4_)
-
A
1. sample
2. false
3 .25
4. 5
-
B
1. random
2. false
3. 0.25
4. 5
-
C
1. sample
2. false
3. 0.25
4. 5
-
D
1. sample
2. false
3. 0.5
4. 25
-
E
1. take
2. false
3. 0.25
4. 5
-
F
1. sample
2. true
3. 0.25
4. 5
Reveal correct answer
Correct answer: C
Explanation
one example of sample will look like this
df.sample(false, 0.25, 5)
Seed parameter, third parameter for this function is used to save the state of a random function, so that it can generate same random numbers on multiple executions of the code on the same machine or on different machines (for a specific seed value).
so the last parameter seed is not really important for this question.
Discussion
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