DA0-002 Data Acquisition and Preparation Practice Question
Which TWO are examples of internal data sources? (Select exactly 2)
⚠ Common exam trap
CompTIA often tests the distinction between data sources and data access methods, so candidates mistakenly select APIs or sensor readings as internal sources when they are actually mechanisms or external origin points.
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
✓
Relational databases
Relational databases are internal data sources because they store structured data generated and controlled within an organization's own systems. They are typically managed by internal IT teams and accessed via SQL queries, making them a classic example of an internal data repository.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
APIs
Why it's wrong here
Can be external; not necessarily internal.
- ✓
Relational databases
Why this is correct
Common internal source.
- ✗
Sensor readings
Why it's wrong here
Often external IoT devices.
- ✗
Social media comments
Why it's wrong here
External third-party data.
- ✓
Flat files
Why this is correct
Common internal source.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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