Data Engineering Cloud Data Storage Solutions 3

Question 1

Which Azure service provides hierarchical namespace support optimized for big-data analytics?

Accepted Answer

Azure Data Lake Storage Gen2

Answer

ADLS Gen2 adds a hierarchical namespace on top of Blob Storage for analytics workloads.

Question 2

What is the purpose of partitioning data in cloud object storage for a query engine?

Accepted Answer

To prune irrelevant data and reduce scan volume

Answer

Partitioning lets query engines skip directories that don't match filter predicates, cutting scan cost.

Question 3

Which consistency model does Amazon S3 now provide for read-after-write on new objects?

Accepted Answer

Strong read-after-write consistency

Answer

S3 provides strong read-after-write consistency for PUTs of new objects.

Question 4

What is a key reason to enable object versioning in a cloud bucket?

Accepted Answer

To protect against accidental overwrites and deletions

Answer

Versioning retains previous object copies, allowing recovery from unintended changes.

Question 5

Which open table format adds ACID transactions and time travel on top of a data lake?

Accepted Answer

Apache Iceberg

Answer

Apache Iceberg (like Delta Lake and Hudi) brings ACID transactions and snapshots to lake storage.

Data Engineering Practice Test