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Databricks Certified Professional Data Engineer Sample Questions:

1. A data engineer is performing a join operating to combine values from a static userlookup table with a streaming DataFrame streamingDF.
Which code block attempts to perform an invalid stream-static join?

A) streamingDF.join(userLookup, ["user_id"], how="outer")
B) userLookup.join(streamingDF, ["user_id"], how="right")
C) userLookup.join(streamingDF, ["userid"], how="inner")
D) streamingDF.join(userLookup, ["user_id"], how="left")
E) streamingDF.join(userLookup, ["userid"], how="inner")

2. A distributed team of data analysts share computing resources on an interactive cluster with autoscaling configured. In order to better manage costs and query throughput, the workspace administrator is hoping to evaluate whether cluster upscaling is caused by many concurrent users or resource-intensive queries.
In which location can one review the timeline for cluster resizing events?

A) Driver's log file
B) Workspace audit logs
C) Cluster Event Log
D) Ganglia
E) Executor's log file

3. A member of the data engineering team has submitted a short notebook that they wish to schedule as part of a larger data pipeline. Assume that the commands provided below produce the logically correct results when run as presented.

Which command should be removed from the notebook before scheduling it as a job?

A) Cmd 2
B) Cmd 5
C) Cmd 3
D) Cmd 6
E) Cmd 4

4. Which statement regarding spark configuration on the Databricks platform is true?

A) Spark configuration properties set for an interactive cluster with the Clusters UI will impact all notebooks attached to that cluster.
B) The Databricks REST API can be used to modify the Spark configuration properties for an interactive cluster without interrupting jobs.
C) When the same spar configuration property is set for an interactive to the same interactive cluster.
D) Spark configuration set within an notebook will affect all SparkSession attached to the same interactive cluster

5. Which Python variable contains a list of directories to be searched when trying to locate required modules?

A) ,sys.path
B) pylib.source
C) importlib.resource path
D) os-path
E) pypi.path

Solutions:

Question # 1 Answer: B

Question # 2 Answer: D

Question # 3 Answer: D

Question # 4 Answer: A

Question # 5 Answer: A