DA0-002 Data Concepts and Environments Practice Question
Which of the following data types is characterized by a flexible schema and is commonly represented using JSON or XML?
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
✓
Semi-structured data
JSON and XML are examples of semi-structured data, which has a flexible schema unlike structured data (fixed schema) or unstructured data (no 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.
- ✗
Unstructured data
Why it's wrong here
Unstructured data has no predefined data model at all, covering free text, images, audio and video, so JSON or XML, which carry named fields and hierarchy, do not describe it. Unstructured classification fits content requiring extraction before any field-level querying.
- ✗
Structured data
Why it's wrong here
Structured data conforms to a fixed, predefined schema with typed columns, so JSON or XML documents with varying fields cannot be stored without reshaping them. It is the right classification for relational tables and CSV extracts, where every record shares the same declared columns.
- ✓
Semi-structured data
Why this is correct
Semi-structured data lacks a rigid tabular schema yet retains tags or markers separating elements, typically serialised as JSON or XML. This flexibility distinguishes it from structured data, which enforces fixed columns, and unstructured data, which has no defined model.
- ✗
Relational data
Why it's wrong here
Relational data enforces a fixed schema of tables, columns and declared types, so flexible JSON or XML fields cannot vary per record without schema alteration. Relational modelling is the right choice for transactional records with stable, enforced structure and referential integrity.
Go deeper
Related to this question
About these practice questions
Courseiva writes every DA0-002 question from scratch — 1,004 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. 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.