DA0-002 Data Concepts and Environments Practice Question
Which TWO of the following are characteristics of structured data? (Choose TWO.)
⚠ Common exam trap
Test-takers frequently confuse structured data with semi-structured data (e.g., JSON or XML) and incorrectly assume that structured data cannot be queried with SQL or that it requires NoSQL databases.
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
✓
Has a defined schema
Structured data is defined by having a predefined schema, which specifies the data types, constraints, and relationships for each field. This schema ensures consistency and allows for efficient querying and validation. Option A is correct because a defined schema is a fundamental characteristic of structured data, as seen in relational database tables where each column has a specific data type and constraints.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Has a defined schema
Why this is correct
Schema defines structure.
- ✗
Requires NoSQL databases for storage
Why it's wrong here
Structured data is stored in relational databases.
- ✗
Often contains natural language text
Why it's wrong here
Natural language is typical of unstructured data.
- ✗
Cannot be queried using SQL
Why it's wrong here
SQL is used for structured data.
- ✓
Organized in rows and columns
Why this is correct
Structured data is tabular.
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