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API-Testing-Interview-Questions-and-Answers

API Testing Interview Questions and Answers is a comprehensive guide designed to help QA professionals prepare for technical interviews focused on API testing. Whether youu2019re a fresher exploring the basics or an experienced tester aiming to enhance your skills, this guide covers the most frequently asked interview questions along with expert-curated answers.

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API-Testing-Interview-Questions-and-Answers

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  1. Tpoint Tech API Testing Interview Questions and Answers This presentation offers essential preparation for QA and developer roles in 2025. It covers fundamentals, testing types, tools, and best practices, all based on the latest industry insights. https://www.tpointtech.com/api-testing-interview-questions +91-9599086977

  2. What is API Testing? API testing is a crucial phase in software development, focusing on backend communication between software components. Functionality Reliability Verifies that API functions perform as expected. Ensures consistent and dependable API performance. Performance Security Measures speed and efficiency under various loads. Identifies vulnerabilities and protects data integrity. It's critical for modern applications that heavily rely on APIs for seamless data exchange, such as testing RESTful or SOAP APIs for correct responses. Tpoint Tech

  3. Understanding APIs: Interface & Categories An API (Application Programming Interface) acts as an intermediary, enabling different software systems to communicate and exchange data efficiently. Types of APIs Common API Categories • Public APIs: Accessible to external developers (e.g., Google Maps API). • REST: Flexible, stateless, uses standard HTTP methods. • SOAP: Protocol-based, strict standards, XML-only. • Private APIs: Used internally within an organization. • GraphQL: Allows clients to request exactly what they need. • Partner APIs: Shared with specific business partners (e.g., payment gateways). • OS & Hardware APIs: For operating system or device interactions. Tpoint Tech

  4. Essential HTTP Methods in API Testing Understanding HTTP methods is fundamental for effective API interaction and testing, as each method serves a distinct purpose in data manipulation. GET Retrieve data or resources from the server. POST Create new data or resources on the server. PUT Replace an entire existing resource with new data. PATCH Apply partial modifications to an existing resource. DELETE Remove a specified resource from the server. Tpoint Tech

  5. Diverse Types of API Testing Comprehensive API testing involves various methodologies to ensure robust and reliable software. 1 2 Functional Testing Unit Testing Validates that API functions perform as expected under specified conditions. Tests individual API components in isolation to verify their logic. 3 4 Integration Testing Performance Testing Checks the interaction and data flow between the API and other integrated systems. Measures API response time and throughput under various load conditions. 5 6 Security Testing End-to-End Testing Identifies vulnerabilities such as authentication issues, injection flaws, or data breaches. Validates complete workflows and user journeys that involve multiple API calls and system interactions. Tpoint Tech

  6. Leading API Testing Tools A range of powerful tools are available to streamline and enhance API testing, from manual exploration to full automation. Each tool offers unique strengths, catering to different testing needs and integration preferences in a CI/CD pipeline. Tpoint Tech

  7. Key Interview Questions & Answers REST vs. SOAP? REST: Lightweight, stateless, JSON/XML. SOAP: Protocol-based, XML only, strict standards. What is an API Endpoint? A specific URL or URI where API services can be accessed and consumed. How to Validate API Response? Check HTTP status codes, response schema, data accuracy, and error handling. PUT vs. PATCH? PUT: Replaces the entire resource. PATCH: Updates only specific parts of it. Why Automate API Testing? For scalability, repeatability, and seamless integration into CI/CD pipelines. Tpoint Tech

  8. Tpoint Tech Summary: Mastering API Testing Robust Software Core Knowledge Tool Proficiency API testing ensures secure, performant applications. Master API basics, HTTP methods, and testing types. Become adept with tools like Postman and SoapUI. Interview Ready Adapt & Evolve Prepare clear, concise answers to common questions. Continuous learning is vital in the evolving API landscape. +91-9599086977 https://www.tpointtech.com/api-testing-interview-questions Tpoint Tech

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