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Exam Certified Associate Developer for Apache Spark topic 1 question 103 discussion

Actual exam question from Databricks's Certified Associate Developer for Apache Spark
Question #: 103
Topic #: 1
[All Certified Associate Developer for Apache Spark Questions]

The code block shown below should extract the integer value for column sqft from the first row of DataFrame storesDF. Choose the response that correctly fills in the numbered blanks within the code block to complete this task.

Code block:

__1__.__2__.__3__[Int](__4__)

  • A. 1. storesDF
    2. first()
    3. getAs()
    4. “sqft”
  • B. 1. storesDF
    2. first
    3. getAs
    4. sqft
  • C. 1. storesDF
    2. first()
    3. getAs
    4. col(“sqft”)
  • D. 1. storesDF
    2. first
    3. getAs
    4. “sqft”
Show Suggested Answer Hide Answer
Suggested Answer: D 🗳️
by cookiemonster42 at Aug. 2, 2023, 6:38 p.m.

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ARUNKUMARKRISHNASAMY
1 month, 3 weeks ago
Selected Answer: A
A - correct - storesDF.first().getAs[Int]("sqft") D - Incorrect
upvoted 1 times
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ARUNKUMARKRISHNASAMY
1 month, 4 weeks ago
Selected Answer: D
storesDF.first().getAs[Int]("sqft")
upvoted 1 times
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Sowwy1
1 year ago
This is part of the official databricks exam samples. This is the correct answer: D.1. storesDF 2. first 3. getAs 4. "sqft"
upvoted 2 times
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newusername
1 year, 5 months ago
could anyone show working test case ?
upvoted 1 times
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thanab
1 year, 7 months ago
A A is correct. D is incorrect. Option D is incorrect because it uses the first method without parentheses. The first method is a method of a DataFrame and must be called with parentheses to return the first row of the DataFrame. Here’s the corrected code block: ``` storesDF.first().getAsInt ```
upvoted 2 times
carlosmps
10 months, 2 weeks ago
on scala works
upvoted 1 times
carlosmps
10 months, 2 weeks ago
the using of first without parentheses
upvoted 1 times
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cookiemonster42
1 year, 9 months ago
Selected Answer: D
correct. we can use first and first() interchangeably, getAs works as getAs[int]("col_name")
upvoted 2 times
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C (25%)
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