Delta Lake stores table data as a series of data files, but it also stores a lot of other information. Which of the following is stored alongside data files when using Delta Lake?

Question

Options

• ANone of these
• BTable metadata, data summary visualizations, and owner account information
• CTable metadata
• DData summary visualizations
• EOwner account information

• A
  13% (5)
• B
  3% (1)
• C
  77% (30)
• D
  3% (1)
• E
  5% (2)

Explanation

Delta Lake stores table metadata alongside data files in the _delta_log transaction log directory. This log contains schema definitions, partitioning information, file-level statistics, and a history of all transactions - making ACID transactions and time travel possible without an external metastore.

Why the distractors are wrong:

• B is wrong because it bundles two false items with the correct one - Delta Lake stores no data summary visualizations or owner account information natively.
• D is wrong because Delta Lake produces no built-in visualization artifacts on disk; dashboards and summaries live in separate tools (e.g., Databricks UI).
• E is wrong because ownership and account information are managed at the platform/catalog layer (e.g., Unity Catalog), not stored inside the Delta table itself.
• A is wrong because metadata clearly is stored - the entire reliability model of Delta Lake depends on it.

Memory tip: Think of Delta Lake as a table with a diary (_delta_log). The diary records what the data looks like (metadata/schema) and what happened to it (transactions) - but it has no artwork (visualizations) and doesn't know who owns the house (account info).

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