Databricks Certified Data Engineer Associate Exam Prep

Question 6 of 199

Which of the following code blocks will remove the rows where the value in column age is greater than 25 from the existing Delta table my_table and save the updated table?

A.

SELECT * FROM my_table WHERE age > 25;

B.

UPDATE my_table WHERE age > 25;

C.

DELETE FROM my_table WHERE age > 25;

D.

UPDATE my_table WHERE age <= 25;

E.

DELETE FROM my_table WHERE age <= 25;

Question 7 of 199

Which tool is used by Auto Loader to process data incrementally?

A.

Checkpointing

B.

Spark Structured Streaming

C.

Databricks SQL

D.

Unity Catalog

Question 8 of 199

Which of the following commands will return the number of null values in the member_id column?

A.

SELECT count(member_id) FROM my_table;

B.

SELECT count(member_id) - count_null(member_id) FROM my_table;

C.

SELECT count_if(member_id IS NULL) FROM my_table;

D.

SELECT null(member_id) FROM my_table;

Question 9 of 199

Which of the following data lakehouse features results in improved data quality over a traditional data lake?

A.

A data lakehouse provides storage solutions for structured and unstructured data.

B.

A data lakehouse supports ACID-compliant transactions.

C.

A data lakehouse allows the use of SQL queries to examine data.

D.

A data lakehouse stores data in open formats.

E.

A data lakehouse enables machine learning and artificial Intelligence workloads.

Question 10 of 199

A data engineer wants to create a relational object by pulling data from two tables. The relational object does not need to be used by other data engineers in other sessions. In order to save on storage costs, the data engineer wants to avoid copying and storing physical data.

Which of the following relational objects should the data engineer create?

A.

Spark SQL Table

B.

View

C.

Delta Table

D.

Temporary view