DA0-002 Data Concepts and Environments Practice Question
Which of the following is a characteristic of structured data?
⚠ Common exam trap
Many exam-takers confuse semi-structured data (which has some organizational tags but no fixed schema) with structured data, leading them to select Option B, or they mistakenly think SQL cannot analyze structured data, falling for Option C.
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 conforms to a fixed schema with rows and columns.
Structured data is defined by its adherence to a fixed schema, typically organized into rows and columns within relational databases. This rigid structure enables efficient querying and manipulation using SQL, as each field has a predefined data type and constraints. The correct answer highlights this fundamental characteristic, which distinguishes structured data from semi-structured or unstructured formats.
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 conforms to a fixed schema with rows and columns.
Why this is correct
Structured data is organised into a predefined, fixed schema of rows and columns, typically stored in relational databases and queried with SQL. This tabular rigidity satisfies the stem's characteristic, distinguishing it from semi-structured formats like JSON and unstructured content such as text.
- ✗
It has a flexible schema that can vary per record.
Why it's wrong here
Structured data enforces a fixed, predefined schema across every row, so per-record variation describes semi-structured formats such as JSON or XML. It is tempting because schema-on-read flexibility is a genuine strength of data lakes, but it contradicts the rigid tabular model that defines structured data.
- ✗
It cannot be analyzed using SQL.
Why it's wrong here
Structured data resides in relational tables with a defined schema, so it is queried directly with SQL; the claim inverts that. It is tempting because semi-structured and unstructured data, such as JSON documents or free text, often cannot be queried with SQL without prior transformation or extension.
- ✗
It is stored as blobs in a data lake.
Why it's wrong here
Structured data is held in relational tables with typed columns, not as opaque blobs; blob storage in a data lake is where raw unstructured and semi-structured files land. It is tempting because lakes can contain structured files such as Parquet, but the storage format itself is not the defining characteristic.
Go deeper
Related to this question
About these practice questions
One of 1,004 original DA0-002 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
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.