DA0-002 Data Concepts and Environments Practice Question
A company uses an OLTP system for processing customer transactions. Which characteristic is most important for this system to ensure that each transaction is processed reliably, even if multiple users access the system simultaneously?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
It follows ACID properties
ACID properties (Atomicity, Consistency, Isolation, Durability) are essential for OLTP systems to ensure reliable transaction processing.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
It uses a columnar storage format
Why it's wrong here
Columnar storage is used in data warehouses for analytics, not OLTP.
- ✗
It stores data in a denormalized schema
Why it's wrong here
Denormalization is used for analytics; OLTP typically uses normalized schemas for efficiency.
- ✗
It supports complex analytical queries
Why it's wrong here
Complex analytical queries are typical of OLAP systems, not OLTP.
- ✓
It follows ACID properties
Why this is correct
ACID ensures transactions are processed reliably and consistently.
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