Databricks Data Engineer Associate Question 266
Select 2You are tasked with inspecting the directory structure of a Delta Lake table stored in a Databricks workspace. Which of the following directories or files would you expect to find in the Delta Lake table's storage location?
- A
_delta_log/
- B
parquet/
- C
_checkpoints/
- D
_metadata/
- E
manifest.json
Show answer and explanation
Correct answers: A, B
Explanation
The Delta Lake directory structure consists of the _delta_log/ directory, which contains transaction logs to track changes, and Parquet files that store the actual data. These components ensure Delta Lake's ACID compliance and efficient data storage. Other directories or files, such as _checkpoints/, _metadata/, or manifest.json, are not standard parts of a Delta Lake table's directory structure.
- A. Correct.
The
_delta_log/directory is a standard component of Delta Lake. It contains the transaction logs that track all changes to the Delta table. - B. Correct.
The
parquet/directory (or similar structure) stores the actual data files in Parquet format, which is the default file format for Delta Lake data storage. - C. Incorrect.
The
_checkpoints/directory is not a part of the Delta Lake table structure. While it may be used by streaming jobs, it is unrelated to the Delta Lake directory structure. - D. Incorrect.
The
_metadata/directory is not part of the standard Delta Lake directory structure. This directory might exist in other contexts but is not relevant here. - E. Incorrect.
The
manifest.jsonfile is not part of the Delta Lake directory structure. Delta Lake uses transaction logs (_delta_log/) to manage metadata instead of relying on such files.