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Databricks Databricks-Certified-Associate-Developer-for-Apache-Spark-3.5 Question # 23 Topic 3 Discussion

Databricks-Certified-Associate-Developer-for-Apache-Spark-3.5 Exam Topic 3 Question 23 Discussion:
Question #: 23
Topic #: 3

A developer is working with a pandas DataFrame containing user behavior data from a web application.

Which approach should be used for executing agroupByoperation in parallel across all workers in Apache Spark 3.5?

A)

Use the applylnPandas API

B)

Databricks-Certified-Associate-Developer-for-Apache-Spark-3.5 Question 23

C)

Databricks-Certified-Associate-Developer-for-Apache-Spark-3.5 Question 23

D)

Databricks-Certified-Associate-Developer-for-Apache-Spark-3.5 Question 23
A.

Use theapplyInPandasAPI:

df.groupby("user_id").applyInPandas(mean_func, schema="user_id long, value double").show()

B.

Use themapInPandasAPI:

df.mapInPandas(mean_func, schema="user_id long, value double").show()

C.

Use a regular Spark UDF:

from pyspark.sql.functions import mean

df.groupBy("user_id").agg(mean("value")).show()

D.

Use a Pandas UDF:

@pandas_udf("double")

def mean_func(value: pd.Series) -> float:

return value.mean()

df.groupby("user_id").agg(mean_func(df["value"])).show()

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Actual exam question for Databricks Databricks-Certified-Associate-Developer-for-Apache-Spark-3.5 exam by Thorne46174 at May 1, 2026, 1:27:57 PM

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