NoteTube

AI-Generated Video Summary by NoteTube

Part 2 - API Testing Interview Questions & Answers

Part 2 - API Testing Interview Questions & Answers

Naveen AutomationLabs

43:29

Overview

This video, the second part of an API testing interview series, covers questions 16 through 30. It begins by differentiating API testing from unit testing, highlighting that API testing is typically black-box and performed by QA teams, while unit testing is white-box, done by developers. The discussion then contrasts API testing with UI testing, emphasizing that APIs operate in the background without a user interface. Key challenges in API testing are explored, including parameter selection, call sequencing, output validation, and providing input values without a GUI. The video details various testing methods applicable to APIs, such as functional, load, security, and automation testing, and explains why API testing is well-suited for automation due to its lack of UI dependencies. Common API errors, bug types, and the importance of API documentation are also discussed, along with popular documentation tools like Swagger and MyB. Finally, the video delves into RESTful web services, defining REST, resources, and the differences between URI, URL, and URN, and clarifying that REST uses HTTP as its communication protocol.

Want AI Chat, Flashcards & Quizzes from this video?

Sign Up Free

Chapters

  • •API testing is black-box, performed by QA; Unit testing is white-box, performed by developers.
  • •API testing focuses on external functionality, while unit testing verifies individual code components.
  • •UI testing deals with the graphical user interface, whereas API testing operates in the background.
  • •API testing lacks a UI, making it distinct from UI testing.
  • •Parameter selection and combination for effective test case design.
  • •Call sequencing when one API depends on another.
  • •Output verification and validation of complex responses.
  • •Providing input values without a graphical user interface.
  • •Functional testing, load testing, security/penetration testing.
  • •Discovery testing (CRUD operations), usability, and reliability testing.
  • •Automation testing for efficiency and speed.
  • •End-to-end integration testing and API documentation testing.
  • •APIs are ideal for automation due to the absence of UI dependencies (no XPath, locator issues).
  • •They provide a stable interface and faster feedback.
  • •Testing is straightforward: hit API, get response, validate.
  • •Missing module errors, documentation errors, parameter validation errors.
  • •Bugs include missing/duplicate functionality, graceful error handling failures, performance issues.
  • •Inconsistent error handling and multi-threading issues can occur.
  • •Essential for understanding API structure, request/response formats, and authentication.
  • •Popular tools include Swagger and MyB for generating interactive documentation.
  • •Documentation should be based on design documents, acceptance criteria, and stakeholder discussions.
  • •REST stands for Representational State Transfer; it's an architectural style, not a protocol.
  • •REST revolves around resources, accessed via HTTP methods (GET, POST, PUT, DELETE).
  • •Resources can be represented in various formats like JSON, XML, text, or HTML.
  • •Key components: HTTP method, URI, and resource representation.
  • •URI (Uniform Resource Identifier) uniquely identifies a resource.
  • •URL (Uniform Resource Locator) is a type of URI that specifies the access protocol (e.g., HTTP).
  • •URN (Uniform Resource Name) is another type of URI that provides a persistent name.
  • •JSON and XML are the most popular representations for resources in RESTful services.

Key Takeaways

  1. 1API testing is crucial for validating backend functionality and integration, distinct from UI testing.
  2. 2Understanding the differences between API, unit, and UI testing is fundamental for QA roles.
  3. 3Key challenges in API testing involve managing parameters, call sequences, and validating complex outputs.
  4. 4API testing is highly suitable for automation due to its lack of UI dependencies, leading to faster feedback.
  5. 5Robust API documentation, often generated using tools like Swagger, is essential for effective testing and development.
  6. 6REST is an architectural style using HTTP methods to interact with resources, commonly represented as JSON or XML.
  7. 7Distinguishing between URI, URL, and URN is important for precise communication about web resources.
  8. 8Thorough testing, including functional, load, and security aspects, ensures API reliability and performance.
Create Your Own Summary
Part 2 - API Testing Interview Questions & Answers | NoteTube | NoteTube