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Databricks Certified-Data-Engineer-Professional Exam Syllabus Topics:

Databricks Certified Data Engineer Professional Sample Questions:

1. The data governance team has instituted a requirement that all tables containing Personal Identifiable Information (PH) must be clearly annotated. This includes adding column comments, table comments, and setting the custom table property "contains_pii" = true.
The following SQL DDL statement is executed to create a new table:

Which command allows manual confirmation that these three requirements have been met?

A) SHOW TABLES dev
B) SHOW TBLPROPERTIES dev.pii test
C) DESCRIBE DETAIL dev.pii test
D) DESCRIBE HISTORY dev.pii test
E) DESCRIBE EXTENDED dev.pii test

2. The data engineering team has configured a job to process customer requests to be forgotten (have their data deleted). All user data that needs to be deleted is stored in Delta Lake tables using default table settings.
The team has decided to process all deletions from the previous week as a batch job at 1am each Sunday. The total duration of this job is less than one hour. Every Monday at 3am, a batch job executes a series of VACUUM commands on all Delta Lake tables throughout the organization.
The compliance officer has recently learned about Delta Lake's time travel functionality. They are concerned that this might allow continued access to deleted data.
Assuming all delete logic is correctly implemented, which statement correctly addresses this concern?

A) Because Delta Lake time travel provides full access to the entire history of a table, deleted records can always be recreated by users with full admin privileges.
B) Because the default data retention threshold is 24 hours, data files containing deleted records will be retained until the vacuum job is run the following day.
C) Because the vacuum command permanently deletes all files containing deleted records, deleted records may be accessible with time travel for around 24 hours.
D) Because Delta Lake's delete statements have ACID guarantees, deleted records will be permanently purged from all storage systems as soon as a delete job completes.
E) Because the default data retention threshold is 7 days, data files containing deleted records will be retained until the vacuum job is run 8 days later.

3. A data engineer wants to automate job monitoring and recovery in Databricks using the Jobs API.
They need to list all jobs, identify a failed job, and rerun it. Which sequence of API actions should the data engineer perform?

A) Use the jobs/list endpoint to list jobs, check job run statuses with jobs/runs/list, and rerun a failed job using jobs/run-now.
B) Use the jobs/list endpoint to list jobs, then use the jobs/create endpoint to create a new job, and run the new job using jobs/run-now.
C) Use the jobs/get endpoint to retrieve job details, then use jobs/update to rerun failed jobs.
D) Use the jobs/cancel endpoint to remove failed jobs, then recreate them with jobs/create and run the new ones.

4. An upstream system has been configured to pass the date for a given batch of data to the Databricks Jobs API as a parameter. The notebook to be scheduled will use this parameter to load data with the following code:
df = spark.read.format("parquet").load(f"/mnt/source/(date)")
Which code block should be used to create the date Python variable used in the above code block?

A) import sys
date = sys.argv[1]
B) dbutils.widgets.text("date", "null")
date = dbutils.widgets.get("date")
C) date = spark.conf.get("date")
D) input_dict = input()
date= input_dict["date"]
E) date = dbutils.notebooks.getParam("date")

5. Which REST API call can be used to review the notebooks configured to run as tasks in a multi- task job?

A) /jobs/runs/list
B) /jobs/runs/get-output
C) /jobs/list
D) /jobs/runs/get
E) /jobs/get

Solutions: