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

Suggested Answer: D 🗳️

by cookiemonster42 at Aug. 2, 2023, 6:38 p.m.

Comments

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ARUNKUMARKRISHNASAMY

4 months, 3 weeks ago

Selected Answer: A

A - correct - storesDF.first().getAs[Int]("sqft") D - Incorrect

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ARUNKUMARKRISHNASAMY

5 months ago

Selected Answer: D

storesDF.first().getAs[Int]("sqft")

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Sowwy1

1 year, 4 months ago

This is part of the official databricks exam samples. This is the correct answer: D.1. storesDF 2. first 3. getAs 4. "sqft"

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newusername

1 year, 9 months ago

could anyone show working test case ?

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thanab

1 year, 11 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 ```

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carlosmps

1 year, 1 month ago

on scala works

upvoted 1 times

carlosmps

1 year, 1 month ago

the using of first without parentheses

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cookiemonster42

2 years ago

Selected Answer: D

correct. we can use first and first() interchangeably, getAs works as getAs[int]("col_name")

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