The correct answer is structured, semi-structured, unstructured. This ordering reflects the decreasing level of schema enforcement: structured data, like the relational table with fixed CustomerID, FullName, and Email columns, adheres to a rigid schema with defined data types, while semi-structured data, such as the JSON product descriptions, uses flexible key-value pairs with metadata tags that provide some organization but no fixed schema, and unstructured data, like JPEG image files, consists of binary blobs with no queryable schema or metadata. On the Microsoft Azure Data Fundamentals DP-900 exam, this concept tests your ability to classify Azure data stores—for example, recognizing that Azure SQL Database handles structured data, Cosmos DB supports semi-structured JSON, and Blob Storage manages unstructured files. A common trap is confusing JSON as unstructured because its fields vary, but remember: any data with tags or keys is semi-structured. For a quick memory tip, think of a filing cabinet: structured is a labeled folder with fixed slots, semi-structured is a folder with sticky notes, and unstructured is a pile of photos.
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 data in a relational table with columns CustomerID, FullName, and Email. They also store product descriptions as JSON documents with varying fields, and product images as JPEG files. Which of the following correctly classifies 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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Structured, semi-structured, unstructured
The customer data in a relational table with fixed columns (CustomerID, FullName, Email) is structured because it has a rigid schema and defined data types. The JSON documents for product descriptions are semi-structured because they use key-value pairs with flexible fields but still have metadata (tags, keys) that provide organization. The JPEG product images are unstructured because they are binary blobs with no inherent schema or metadata that the database can query directly. This ordering from most to least structured matches option A.
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.
✓
Structured, semi-structured, unstructured
Why this is correct
Correct. Relational table data is fully structured, JSON is semi-structured, and JPEG images are 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.
✗
Unstructured, semi-structured, structured
Why it's wrong here
Incorrect. This reverses the order; images are not the most structured.
✗
Semi-structured, structured, unstructured
Why it's wrong here
Incorrect. JSON (semi-structured) is not more structured than a relational table.
✗
Structured, unstructured, semi-structured
Why it's wrong here
Incorrect. Semi-structured data (JSON) is more structured than unstructured data (images).
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 (JPEG) because both lack a fixed schema, but JSON has inherent key-value structure that databases can query, whereas JPEG is purely binary with no queryable structure.
Detailed technical explanation
How to think about this question
In Azure, structured data is typically stored in Azure SQL Database or Azure Synapse dedicated SQL pools with fixed schemas enforced by constraints. Semi-structured data like JSON is often stored in Azure Cosmos DB or as NVARCHAR(MAX) in SQL Server, where the OPENJSON function can parse it. Unstructured data like JPEG images is stored in Azure Blob Storage or Azure Data Lake Storage, and can only be processed by external tools (e.g., Azure Cognitive Services) rather than queried directly with SQL.
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: Structured, semi-structured, unstructured — The customer data in a relational table with fixed columns (CustomerID, FullName, Email) is structured because it has a rigid schema and defined data types. The JSON documents for product descriptions are semi-structured because they use key-value pairs with flexible fields but still have metadata (tags, keys) that provide organization. The JPEG product images are unstructured because they are binary blobs with no inherent schema or metadata that the database can query directly. This ordering from most to least structured matches option A.
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 →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company stores customer information in a SQL database with fixed columns (CustomerID, Name, Email). They also store scanned PDF contracts and product images in a file storage system. Which statement correctly describes the types of data mentioned?
easy
A.Both the customer information and the files are structured data.
B.The customer information is semi-structured, and the files are unstructured.
✓ C.The customer information is structured, and the files are unstructured.
D.Both the customer information and the files are unstructured.
Why C: Customer information stored in fixed columns (CustomerID, Name, Email) follows a strict schema with defined data types and relationships, making it structured data. Scanned PDF contracts and product images are binary files with no inherent schema or organization, fitting the definition of unstructured data. Option C correctly pairs these classifications.
Variation 2. A company stores customer information in a SQL database table with columns: CustomerID, FirstName, LastName, Email, SignupDate. They also store product images as JPEG files in Azure Blob Storage. Which statement correctly describes the types of data involved?
easy
A.Customer data is unstructured, product images are semi-structured.
✓ B.Customer data is structured, product images are unstructured.
C.Both are structured.
D.Customer data is semi-structured, product images are unstructured.
Why B: Customer data stored in a SQL database table with defined columns (CustomerID, FirstName, LastName, Email, SignupDate) is structured because it adheres to a fixed schema with rows and columns. Product images stored as JPEG files in Azure Blob Storage are unstructured because they lack a predefined data model and are stored as binary large objects (BLOBs) without a schema. Option B correctly identifies this distinction.
Variation 3. A company stores customer records in a relational table with columns like CustomerID, Name, and Email. Product reviews are stored as JSON documents, and marketing images are stored as PNG files. Which of the following correctly orders these data types from most structured to least structured?
Why B: Customer records in a relational table have a fixed schema with defined columns (e.g., CustomerID, Name, Email), making them the most structured. Product reviews stored as JSON documents are semi-structured because they have a flexible schema with key-value pairs but no fixed columns. Marketing images as PNG files are unstructured binary data with no inherent schema. Option B correctly orders these from most to least structured.
Last reviewed: Jun 11, 2026
Question Discussion
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