Quick Answer
The answer is NVARCHAR, specifically NVARCHAR(MAX), which is the correct data type for JSON storage in Azure SQL Database. This is because JSON documents are stored as plain text strings, and NVARCHAR supports Unicode characters, ensuring compatibility with global data while enabling the full suite of built-in JSON functions like JSON_VALUE, JSON_QUERY, OPENJSON, and ISJSON for validation and querying. On the Microsoft Azure Database Administrator Associate DP-300 exam, this concept tests your understanding that Azure SQL Database does not have a dedicated JSON data type—unlike NoSQL databases—so the platform relies on NVARCHAR to store JSON as text, with the MAX variant recommended for large or variable-length documents. A common trap is assuming a specialized JSON or XML type exists, but the key is remembering that JSON in Azure SQL is always a string. Memory tip: think “JSON is Just a String, so NVARCHAR is the Thing”—JIST for short.
This DP-300 practice question tests your understanding of plan and implement data platform resources. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
You need to create an Azure SQL Database that will be used by a new application. The database must support JSON data storage and querying. Which data type should you use to store JSON documents?
TEXT
Why wrong: TEXT data type is deprecated.
NVARCHAR
NVARCHAR supports JSON storage and querying.
XML
Why wrong: XML is for XML data, not JSON.
VARCHAR
Why wrong: VARCHAR does not support Unicode and is not recommended for JSON.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
NVARCHAR
B is correct because Azure SQL Database uses the NVARCHAR data type to store JSON documents as text. JSON is stored as a string in NVARCHAR columns, which supports Unicode characters and allows the use of built-in JSON functions like JSON_VALUE, JSON_QUERY, OPENJSON, and ISJSON for validation and querying. NVARCHAR(MAX) is recommended for large or variable-length JSON documents.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
TEXT
Why it's wrong here
TEXT data type is deprecated.
NVARCHAR
Why this is correct
NVARCHAR supports JSON storage and querying.
Related concept
Read the scenario before looking for a memorised answer.
XML
Why it's wrong here
XML is for XML data, not JSON.
VARCHAR
Why it's wrong here
VARCHAR does not support Unicode and is not recommended for JSON.
Common exam traps
The trap here is that candidates often assume JSON requires a special data type like XML or a binary format, but Azure SQL Database stores JSON as plain text in NVARCHAR, leveraging the same string-based approach used for other semi-structured data.
Detailed technical explanation
Under the hood, Azure SQL Database stores JSON as plain text in NVARCHAR columns, but the engine provides a set of functions that parse the JSON text at query time without requiring a dedicated JSON data type. This design allows JSON to coexist with relational data and supports indexing on JSON properties using computed columns or JSON path expressions. In real-world scenarios, using NVARCHAR(MAX) with a CHECK constraint (ISJSON) ensures data integrity and enables efficient querying of nested JSON structures.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
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FAQ
Plan and implement data platform resources — This question tests Plan and implement data platform resources — Read the scenario before looking for a memorised answer..
The correct answer is: NVARCHAR — B is correct because Azure SQL Database uses the NVARCHAR data type to store JSON documents as text. JSON is stored as a string in NVARCHAR columns, which supports Unicode characters and allows the use of built-in JSON functions like JSON_VALUE, JSON_QUERY, OPENJSON, and ISJSON for validation and querying. NVARCHAR(MAX) is recommended for large or variable-length JSON documents.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
This DP-300 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-300 exam.
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