REST API Interview Questions: 150 Q&A

Overview

This handbook provides 150 REST API interview questions and answers, designed to prepare individuals for various levels of API testing and development roles. It covers fundamental REST concepts, HTTP semantics, security, automation, and advanced scenario-based questions. The questions are structured progressively, moving from core concepts to more complex topics, offering insights into interviewer expectations and practical applications of REST principles. The resource is suitable for those seeking to deepen their understanding of REST APIs, articulate key concepts, and prepare for technical interviews. It helps users practice answering questions aloud and understand the underlying logic rather than just memorizing responses, covering areas like authentication, API test design, performance, and security best practices aligned with modern standards.

Table of contents

1. REST Fundamentals
2. HTTP Methods & Semantics
3. Status Codes
4. Request Structure & Headers
5. JSON, XML & Payloads
6. Authentication & Authorization
7. API Test Design
8. Pagination, Sorting, Filtering & Search
9. Caching, Concurrency & Reliability
10. OpenAPI, Contracts & Versioning
11. Security & OWASP API Risks
12. Automation & Framework Design
13. Scenario-based REST Testing
14. Performance, Observability & Debugging
15. Senior Design & Trade-off Questions

Format and what you get

• A downloadable PDF you can read on phone or laptop.
• Included in the QA Notes Vault: one payment unlocks every note in the Vault, with lifetime access to it.
• Download after signing in with the account that paid. Refunds follow our refund policy.

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