SQL Server Interview Topic 38: JSON and API Data
This topic checks whether you can discuss modern API data with SQL Server. Full stack applications often exchange JSON between frontend, backend, and database.
You should be able to explain JSON usage without replacing good relational table design.
Q225. What is JSON in full stack applications?
Quick interview answer:
JSON is a text format used to send structured data between frontend and backend APIs. For example, a student form can be sent as JSON from the browser to the API.
Study in detail: API Integration - This lesson connects SQL Server with API data.
Q226. Can SQL Server store JSON?
Quick interview answer:
Yes, SQL Server can store JSON text in columns and has functions to read parts of JSON. But normal relational tables are usually better for important searchable data.
Study in detail: Advanced Patterns - This article explains practical design choices.
Q227. When should you avoid storing JSON in a table?
Quick interview answer:
Avoid storing JSON for core data that needs joins, constraints, filtering, and reporting. For example, student name, class, marks, and fees should be normal columns, not hidden inside JSON.
Study in detail: Best Practices and Design - This lesson explains clean table design.
Q228. When can JSON be useful in SQL Server?
Quick interview answer:
JSON can be useful for flexible settings, audit snapshots, API payload logs, or data that does not need heavy relational queries. Even then, sensitive data should be protected.
Study in detail: Compliance and Audit and Security - These lessons explain safe data handling.
Q229. What is the interview-safe answer for JSON in SQL Server?
Quick interview answer:
SQL Server can work with JSON, but I would not use JSON to replace proper relational design. I use normal tables for core data and JSON only when the requirement fits.
Study in detail: Data Modeling and Normalization - This topic explains relational design thinking.
JSON is useful, but do not make it sound like a shortcut for table design.