Question 1

Your data science team uses Azure Databricks. They are building a data lakehouse architecture and need a storage format that supports ACID transactions, scalable metadata handling, and unifies streaming and batch data processing.

They also require the ability to perform 'time travel' (data versioning) to query previous versions of the data for machine learning model reproducibility.

Which storage format should you recommend?

Accepted Answer

Recognize the keywords 'ACID transactions', 'time travel', and 'Databricks'. These are the defining features of Delta Lake.

Question 2

What mistakes do candidates make on this AZ-305 question?

Accepted Answer

Choosing Parquet. Delta Lake uses Parquet under the hood, but Parquet alone cannot do ACID transactions or time travel.

How to approach this question

Full Answer

Common mistakes

Practice the full Azure Solutions Architect Expert AZ-305 Practice Exam 5

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