DP-900 Describe core data concepts Practice Question
This DP-900 practice question tests your understanding of describe core data concepts. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company stores customer records in a relational database table with fixed columns (CustomerID, Name, Email). They also store product reviews as JSON documents that may contain varying fields such as Rating, Comment, and optional Tags. Additionally, they store product images as JPEG files. Which of the following correctly orders these data types from most structured to least structured?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "least"
Why it matters: You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.
Why wrong: This order is incorrect because relational tables are more structured than JSON documents.
B
Relational table, JSON documents, image files
This is correct: relational tables have a fixed schema (most structured), JSON allows flexible fields (semi-structured), and image files are binary with no inherent structure (unstructured).
C
Image files, relational table, JSON documents
Why wrong: This order is incorrect because image files are the least structured, not the most.
D
Relational table, image files, JSON documents
Why wrong: This order is incorrect because JSON documents are semi-structured and more structured than image files.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Relational table, JSON documents, image files
Relational tables enforce a fixed schema with predefined columns and data types, making them the most structured. JSON documents have a flexible schema where fields like Tags are optional, placing them in the middle. Image files are binary blobs with no inherent structure, making them the least structured. Option B correctly orders these from most structured (relational table) to least structured (image files).
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
JSON documents, relational table, image files
Why it's wrong here
This order is incorrect because relational tables are more structured than JSON documents.
✓
Relational table, JSON documents, image files
Why this is correct
This is correct: relational tables have a fixed schema (most structured), JSON allows flexible fields (semi-structured), and image files are binary with no inherent structure (unstructured).
Clue confirmation
The clue word "least" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Image files, relational table, JSON documents
Why it's wrong here
This order is incorrect because image files are the least structured, not the most.
✗
Relational table, image files, JSON documents
Why it's wrong here
This order is incorrect because JSON documents are semi-structured and more structured than image files.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse semi-structured JSON with unstructured data, or assume that all data with a format (like JPEG headers) is structured, but the key distinction is schema rigidity and queryability.
Detailed technical explanation
How to think about this question
Structured data adheres to a strict schema (e.g., SQL tables with fixed columns and data types), semi-structured data uses self-describing formats like JSON or XML with optional fields, and unstructured data lacks a predefined data model (e.g., JPEG, PDF). In practice, querying JSON documents in Azure SQL Database requires OPENJSON or JSON_VALUE functions, while relational tables support direct T-SQL queries, and image files require blob storage APIs like Azure Blob Storage with no native querying capability.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-900 question in full detail.
Describe core data concepts — This question tests Describe core data concepts — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Relational table, JSON documents, image files — Relational tables enforce a fixed schema with predefined columns and data types, making them the most structured. JSON documents have a flexible schema where fields like Tags are optional, placing them in the middle. Image files are binary blobs with no inherent structure, making them the least structured. Option B correctly orders these from most structured (relational table) to least structured (image files).
What should I do if I get this DP-900 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "least". You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This DP-900 practice question is part of Courseiva's free Microsoft 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 DP-900 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.