DA0-002 Data Concepts and Environments Practice Question
Which TWO of the following are characteristics of structured data? (Choose TWO.)
⚠ Common exam trap
It's easy for candidates to confuse semi-structured data (which uses tags or labels) with structured data, or they incorrectly assume structured data can lack a schema, when in fact a predefined schema is its defining requirement.
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
✓
Stored in rows and columns
Structured data is organized into rows and columns, typically within relational databases or spreadsheets, where each column represents a specific attribute and each row represents a record. This tabular format enables efficient querying, sorting, and indexing using languages like SQL. The rigid row-and-column structure ensures data consistency and supports ACID (Atomicity, Consistency, Isolation, Durability) properties.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Stored in rows and columns
Why this is correct
Tabular storage is a hallmark of structured data like relational databases.
- ✗
Lacks a fixed schema
Why it's wrong here
Lack of schema is typical of unstructured data.
- ✓
Has a predefined data model
Why this is correct
Structured data is organized in a schema with defined fields.
- ✗
Uses tags to define elements
Why it's wrong here
Tags are used in semi-structured data like XML.
- ✗
Consists of free-form text
Why it's wrong here
Free-form text is unstructured.
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