DA0-002 Data Acquisition and Preparation Practice Question
A data team is designing an ETL process to extract data from an operational database daily. The database experiences heavy write loads during business hours. What is the best practice to minimize impact on operations?
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
✓
Use replication or a read replica to extract data
(use replication or a read replica) is best because it offloads the extraction from the primary database, minimizing impact on operational write loads. Option A extracts directly from the primary, impacting performance. Option B runs extraction during peak hours, which increases load and negatively affects operations. Option C still extracts from the primary even at midnight, though less busy, it still adds load to the primary.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Extract directly from the primary database with high priority
Why it's wrong here
High priority extraction can still degrade performance.
- ✗
Run the extraction during peak hours to ensure data freshness
Why it's wrong here
Running during peak hours maximizes impact on operations.
- ✗
Schedule extraction at midnight when load is low
Why it's wrong here
Even at low load, extracting from primary can still cause contention.
- ✓
Use replication or a read replica to extract data
Why this is correct
Read replicas are designed for such purposes and do not affect the primary.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DA0-002 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DA0-002 exam.