LFC Medallion Architecture Layers 5

Question 1

A team discovers that a Silver-layer transformation had a bug that corrupted 3 days of data. What is the MOST efficient recovery path in Medallion Architecture?

Accepted Answer

Use Delta time travel to restore the Silver table to a pre-bug version, then reprocess from Bronze

Answer

Delta time travel restores the Silver table to a known-good state, and the intact Bronze layer provides the raw data to reprocess the affected window.

Question 2

Which access control pattern is recommended for the Bronze layer in a multi-team Medallion implementation?

Accepted Answer

Only data engineers and automated pipelines have write access; analysts read Silver/Gold

Answer

Bronze should be write-restricted to ingestion pipelines and engineers to prevent accidental mutation of the raw source-of-truth.

Question 3

What is the primary reason organizations choose to implement all three Medallion layers rather than loading data directly into Gold?

Accepted Answer

Staged refinement enables reusability, auditability, and faster debugging of data quality issues

Answer

Multiple layers allow teams to reuse clean Silver data for different Gold outputs, trace bugs to their source, and avoid re-ingesting from upstream on errors.

Question 4

A Silver table has 50 million rows. A Gold table derived from it contains 10,000 aggregated rows. Which approach best describes how this Gold table should be refreshed?

Accepted Answer

Scheduled or triggered incremental merge using only changed Silver records

Answer

Incremental processing reads only new or changed Silver records (via CDF or watermarks) and merges results into Gold, avoiding full-table scans.

Question 5

Which of the following scenarios VIOLATES best practices for Medallion Architecture?

Accepted Answer

Allowing business analysts to modify Gold tables directly

Answer

Gold tables should be populated by controlled pipelines; allowing ad-hoc analyst writes breaks data integrity and reproducibility.

(LFC) Lakehouse Fundamentals Certification Practice Test

(LFC) Lakehouse Fundamentals Certification Practice Test

LFC Medallion Architecture Layers 5