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Question 62 of 100
Advanced API Testing
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Q62: RESTful vs. GraphQL APIs: Architectural Tradeoffs.
⚖️Core Concept
RESTful vs. GraphQL APIs: Architectural Tradeoffs.
Key Takeaways & Architecture Summary
- ✓Endpoint Count: REST uses multiple resource URLs; GraphQL uses a single POST endpoint.
- ✓Data Over-fetching: REST returns static models; GraphQL allows clients to request specific properties.
- ✓Caching Strategy: REST relies on native HTTP caching; GraphQL requires custom client caching.
Direct Answer Summary
RESTful APIs expose separate endpoints representing distinct resources, using standard HTTP methods and status codes. GraphQL APIs expose a single endpoint, allowing clients to submit queries that define the exact data fields they need, preventing over-fetching at the cost of caching complexity.
⚠️ Senior Engineering Warning (Red Flag)
Avoid asserting that GraphQL is always better than REST. REST's simple HTTP structure and native proxy/CDN caching are superior for highly repetitive, public data retrieval tasks.
💡 STAR Architectural Explanation & Pro Tip
GraphQL shifts power to the frontend client, preventing multiple round-trip requests. However, it increases backend complexity and requires query cost analysis to prevent DDoS attacks.
RestAssuredTest.java
Rest-Assured + Java// RESTful GET: /api/v1/jobs/12 -> returns large static user model
// GraphQL query: POST /graphql -> requesting only the company name
query { job(id: 12) { company } }