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  • Exam Name: Databricks Certified Data Engineer Professional Exam
  • Last Update: 05-Jun-2023
  • Questions and Answers: 222
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Databricks-Certified-Professional-Data-Engineer Questions and Answers

Question # 1

What are the different ways you can schedule a job in Databricks workspace?

A.

Continuous, Incremental

B.

On-Demand runs, File notification from Cloud object storage

C.

Cron, On Demand runs

D.

Cron, File notification from Cloud object storage

E.

Once, Continuous

Question # 2

You are tasked to set up a set notebook as a job for six departments and each department can run the task parallelly, the notebook takes an input parameter dept number to process the data by department, how do you go about to setup this up in job?

A.

Use a single notebook as task in the job and use dbutils.notebook.run to run each note-book with parameter in a different cell

B.

A task in the job cannot take an input parameter, create six notebooks with hardcoded dept number and setup six tasks with linear dependency in the job

C.

A task accepts key-value pair parameters, creates six tasks pass department number as parameter foreach task with no dependency in the job as they can all run in parallel.

(Correct)

D.

A parameter can only be passed at the job level, create six jobs pass department number to each job with linear job dependency

E.

A parameter can only be passed at the job level, create six jobs pass department number to each job with no job dependency

Question # 3

You are currently working on reloading customer_sales tables using the below query

1. INSERT OVERWRITE customer_sales

2. SELECT * FROM customers c

3. INNER JOIN sales_monthly s on s.customer_id = c.customer_id

After you ran the above command, the Marketing team quickly wanted to review the old data that was in the table. How does INSERT OVERWRITE impact the data in the customer_sales table if you want to see the previous version of the data prior to running the above statement?

A.

Overwrites the data in the table, all historical versions of the data, you can not time travel to previous versions

B.

Overwrites the data in the table but preserves all historical versions of the data, you can time travel to previous versions

C.

Overwrites the current version of the data but clears all historical versions of the data, so you can not time travel to previous versions.

D.

Appends the data to the current version, you can time travel to previous versions

E.

By default, overwrites the data and schema, you cannot perform time travel

Question # 4

Which of the following SQL statement can be used to query a table by eliminating duplicate rows from the query results?

A.

SELECT DISTINCT * FROM table_name

B.

SELECT DISTINCT * FROM table_name HAVING COUNT(*) > 1

C.

SELECT DISTINCT_ROWS (*) FROM table_name

D.

SELECT * FROM table_name GROUP BY * HAVING COUNT(*) < 1

E.

SELECT * FROM table_name GROUP BY * HAVING COUNT(*) > 1

Question # 5

How to determine if a table is a managed table vs external table?

A.

Run IS_MANAGED(‘table_name’) function

B.

All external tables are stored in data lake, managed tables are stored in DELTA lake

C.

All managed tables are stored in unity catalog

D.

Run SQL command DESCRIBE EXTENDED table_name and check type

E.

Run SQL command SHOW TABLES to see the type of the table

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