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Databricks Updated Databricks-Certified-Professional-Data-Engineer Exam Questions and Answers by arian

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Databricks Databricks-Certified-Professional-Data-Engineer Exam Overview :

Exam Name: Databricks Certified Data Engineer Professional Exam
Exam Code: Databricks-Certified-Professional-Data-Engineer Dumps
Vendor: Databricks Certification: Databricks Certification
Questions: 120 Q&A's Shared By: arian
Question 28

Which is a key benefit of an end-to-end test?

Options:

A.

It closely simulates real world usage of your application.

B.

It pinpoint errors in the building blocks of your application.

C.

It provides testing coverage for all code paths and branches.

D.

It makes it easier to automate your test suite

Discussion
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Question 29

Which statement describes Delta Lake Auto Compaction?

Options:

A.

An asynchronous job runs after the write completes to detect if files could be further compacted; if yes, an optimize job is executed toward a default of 1 GB.

B.

Before a Jobs cluster terminates, optimize is executed on all tables modified during the most recent job.

C.

Optimized writes use logical partitions instead of directory partitions; because partition boundaries are only represented in metadata, fewer small files are written.

D.

Data is queued in a messaging bus instead of committing data directly to memory; all data is committed from the messaging bus in one batch once the job is complete.

E.

An asynchronous job runs after the write completes to detect if files could be further compacted; if yes, an optimize job is executed toward a default of 128 MB.

Discussion
Question 30

A Delta table of weather records is partitioned by date and has the below schema:

date DATE, device_id INT, temp FLOAT, latitude FLOAT, longitude FLOAT

To find all the records from within the Arctic Circle, you execute a query with the below filter:

latitude > 66.3

Which statement describes how the Delta engine identifies which files to load?

Options:

A.

All records are cached to an operational database and then the filter is applied

B.

The Parquet file footers are scanned for min and max statistics for the latitude column

C.

All records are cached to attached storage and then the filter is applied

D.

The Delta log is scanned for min and max statistics for the latitude column

E.

The Hive metastore is scanned for min and max statistics for the latitude column

Discussion
Question 31

Which statement describes integration testing?

Options:

A.

Validates interactions between subsystems of your application

B.

Requires an automated testing framework

C.

Requires manual intervention

D.

Validates an application use case

E.

Validates behavior of individual elements of your application

Discussion
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