Databricks Certified Data Engineer - Associate

Explanation

Correct Answer: B

Why ACID-compliant transactions improve data quality:

1. ACID Properties:

   • Atomicity: Ensures that transactions are all-or-nothing operations
   • Consistency: Guarantees that data remains in a consistent state before and after transactions
   • Isolation: Prevents concurrent transactions from interfering with each other
   • Durability: Ensures committed transactions persist even in case of system failures

2. Traditional Data Lake Limitations:

   • Traditional data lakes lack ACID compliance, leading to potential data corruption
   • Multiple concurrent writes can result in data inconsistencies
   • No guarantee of data integrity during ETL/ELT processes

3. Data Lakehouse Advantages:

   • ACID transactions ensure reliable data updates and modifications
   • Prevents partial writes and maintains data consistency
   • Enables reliable concurrent data processing
   • Supports reliable data versioning and time travel capabilities

Why other options are not correct:

• A: Storage solutions for structured/unstructured data is a feature but doesn't inherently improve data quality
• C: SQL query capability improves accessibility but not necessarily data quality
• D: Open formats improve interoperability but not data quality
• E: ML/AI capabilities are workload features, not data quality improvements

ACID compliance directly addresses data quality issues by ensuring data integrity, consistency, and reliability during data operations, which is a key differentiator from traditional data lakes.