DA0-002 Data Concepts and Environments Practice Question
An e-commerce company stores customer support emails in a text database, product images in a blob store, and sales transactions in a SQL table. Which data store holds only structured data?
⚠ Common exam trap
Candidates often confuse 'structured data' with any data that has some organization (like tags in a blob store or fields in a text document), but only a SQL table enforces a rigid, predefined schema with typed columns and relational constraints, which is the defining characteristic of structured data.
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
✓
SQL table
Structured data conforms to a predefined schema with rows and columns, enforcing data types and relationships. A SQL table is the canonical example of a structured data store because it organizes data into tables with fixed schemas, supports ACID transactions, and enables relational queries via SQL. In contrast, blob stores and text databases store unstructured or semi-structured data without a rigid schema.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Blob store
Why it's wrong here
A blob store holds unstructured binary objects such as images, with no fixed schema or relational columns. It is tempting because blob stores can hold metadata, but the product images themselves are unstructured content, not structured data.
- ✗
Text database
Why it's wrong here
A text database stores unstructured free-form content such as email bodies, so it does not hold only structured data. It is tempting because databases are often associated with structure, but here the SQL table is the sole structured store.
- ✓
SQL table
Why this is correct
The SQL table stores sales transactions in a fixed relational schema with defined columns and types, making it structured data. The text database and blob store hold unstructured content, satisfying the stem's request to identify the structured store.
- ✗
None
Why it's wrong here
The SQL table clearly holds structured, schema-defined transaction rows, so "none" is false. It is tempting if you assume mixed environments contain no purely structured store, but the sales transactions table satisfies that definition exactly.
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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.