Databricks Certified Data Engineer - Associate

Explanation

Correct Answer: D - A data lakehouse supports ACID-compliant transactions.

Why this is correct:

1. ACID Compliance: ACID (Atomicity, Consistency, Isolation, Durability) transactions ensure data integrity and reliability. This is a key feature that distinguishes data lakehouses from traditional data lakes.

2. Improved Data Quality: ACID transactions prevent data corruption, ensure consistency during concurrent operations, and maintain data integrity - all of which directly contribute to improved data quality.

3. Comparison with Traditional Data Lakes: Traditional data lakes typically lack ACID compliance, which can lead to data quality issues like:

   • Partial writes during failures
   • Inconsistent reads during concurrent operations
   • Data corruption risks

Why other options are incorrect:

A. A data lakehouse stores data in open formats.

• While true, this doesn't inherently improve data quality. Both traditional data lakes and lakehouses can use open formats.

B. A data lakehouse allows the use of SQL queries to examine data.

• SQL query capability improves accessibility but doesn't directly improve data quality.

C. A data lakehouse provides storage solutions for structured and unstructured data.

• This is a capability of both traditional data lakes and lakehouses, not a distinguishing feature for data quality.

Key Takeaway:

ACID compliance in data lakehouses ensures reliable data operations, prevents corruption, and maintains consistency - all critical for data quality improvement over traditional data lakes that typically lack this feature.