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Exam Certified Associate Developer for Apache Spark All Questions

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Exam Certified Associate Developer for Apache Spark topic 1 question 134 discussion

Actual exam question from Databricks's Certified Associate Developer for Apache Spark
Question #: 134
Topic #: 1
[All Certified Associate Developer for Apache Spark Questions]

The code block shown below contains an error. The code block is intended to return a new DataFrame from DataFrame storesDF where column storeId is of the type string. Identify the error.

Code block:

storesDF.withColumn(“storeId”, cast(col(“storeId”), StringType()))

  • A. Calls to withColumn() cannot create a new column of the same name on which it is operating.
  • B. DataFrame columns cannot be converted to a new type inside of a call to withColumn().
  • C. The call to StringType should not be followed by parentheses.
  • D. The column name storeId inside the col() operation should not be quoted.
  • E. The cast() operation is a method in the Column class rather than a standalone function.
Show Suggested Answer Hide Answer
Suggested Answer: E 🗳️
by gowthamsara at Jan. 11, 2024, 10:35 a.m.

Comments

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JuanitoFM
9 months ago
Selected Answer: E
https://spark.apache.org/docs/3.1.3/api/python/reference/api/pyspark.sql.Column.cast.html?highlight=cast
upvoted 1 times
...
azure_bimonster
9 months, 2 weeks ago
Selected Answer: E
E is the right
upvoted 1 times
...
Anweee
9 months, 3 weeks ago
It is E, no doubt about it
upvoted 1 times
...
gowthamsara
10 months, 2 weeks ago
Selected Answer: E
E should be the answer
upvoted 1 times
...

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