Quick Answer
The answer is flat files and relational databases. These are correct because internal data sources originate from within an organization’s own operational systems, such as customer relationship management software, enterprise resource planning platforms, or proprietary databases. Flat files, like CSV or log files, are generated and stored locally by internal applications, while relational databases house structured data controlled by internal IT teams and accessed via SQL queries. On the CompTIA Data+ DA0-001 exam, this question tests your ability to distinguish internal sources—data you create and manage—from external sources, such as third-party APIs or public datasets. A common trap is confusing cloud-hosted databases with external sources; remember, if your organization owns and administers the system, it is internal regardless of where it is hosted. For a quick memory tip, think “I for Internal, I for In-house”—if the data is produced by your own business processes, it belongs inside.
This DA0-001 practice question tests your understanding of mining and acquiring data. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which TWO are examples of internal data sources? (Select exactly 2)
APIs
Why wrong: Can be external; not necessarily internal.
Relational databases
Common internal source.
Sensor readings
Why wrong: Often external IoT devices.
Social media comments
Why wrong: External third-party data.
Flat files
Common internal source.
Answer choices
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.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
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.
Related concept
Read the scenario before looking for a memorised answer.
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.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
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.
Detailed technical explanation
Internal data sources are those that reside within an organization's own network and are under its direct administrative control. Relational databases use structured query language (SQL) and enforce ACID properties, while flat files (e.g., CSV, TSV) are simple, portable formats often used for internal data exchange or legacy storage. Both are commonly stored on internal servers or storage area networks (SANs) and are accessed without relying on third-party providers.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the DA0-001 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
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FAQ
Mining and Acquiring Data — This question tests Mining and Acquiring Data — Read the scenario before looking for a memorised answer..
The correct answer is: 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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
This DA0-001 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 DA0-001 exam.
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