Databricks Exam Databricks Certified Associate Developer for Apache Spark 3.0 Topic 1 Question 82 Discussion

Actual exam question for Databricks's Databricks Certified Associate Developer for Apache Spark 3.0 exam

Question #: 82
Topic #: 1

[All Databricks Certified Associate Developer for Apache Spark 3.0 Questions]

Which of the following code blocks concatenates rows of DataFrames transactionsDf and transactionsNewDf, omitting any duplicates?

AtransactionsDf.concat(transactionsNewDf).unique()

BtransactionsDf.union(transactionsNewDf).distinct()

Cspark.union(transactionsDf, transactionsNewDf).distinct()

DtransactionsDf.join(transactionsNewDf, how='union').distinct()

EtransactionsDf.union(transactionsNewDf).unique()

Show Suggested Answer

Suggested Answer: B

DataFrame.unique() and DataFrame.concat() do not exist and union() is not a method of the SparkSession. In addition, there is no union option for the join method in the DataFrame.join() statement.

More info: pyspark.sql.DataFrame.union --- PySpark 3.1.2 documentation

Static notebook | Dynamic notebook: See test 2, Question: 43 (Databricks import instructions)

by Lezlie at Jul 14, 2025, 01:24 PM

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