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Exam Certified Associate Developer for Apache Spark topic 1 question 175 discussion

Actual exam question from Databricks's Certified Associate Developer for Apache Spark
Question #: 175
Topic #: 1
[All Certified Associate Developer for Apache Spark Questions]

Which of the following code blocks returns a DataFrame containing a column month, an integer representation of the month from column openDate from DataFrame storesDF?

Note that column openDate is of type integer and represents a date in the UNIX epoch format — the number of seconds since midnight on January 1 st, 1970.

A sample of storesDF is displayed below:

  • A. storesDF.withColumn("month", getMonth(col("openDate")))
  • B. storesDF.withColumn("month", substr(col("openDate"), 4, 2))
  • C. (storesDF.withColumn("openDateFormat", col("openDate").cast("Date"))
    .withColumn("month", month(col("openDateFormat"))))
  • D. (storesDF.withColumn("openTimestamp", col("openDate").cast("Timestamp"))
    .withColumn("month", month(col("openTimestamp"))))
  • E. storesDF.withColumn("month", month(col("openDate")))
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Suggested Answer: D 🗳️
by Sowwy1 at April 10, 2024, 6:04 p.m.

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Sowwy1
1 month, 1 week ago
D. (storesDF.withColumn("openTimestamp", col("openDate").cast("Timestamp")) .withColumn("month", month(col("openTimestamp"))))
upvoted 1 times
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