SDET Scenario Based Interview Questions

👉 Authentication Scenario:

You're testing an API that requires authentication using OAuth 2.0.

How would you design test scenarios to ensure that the API correctly handles authentication tokens, including scenarios for obtaining, refreshing, and invalidating tokens?

👉 Input Validation Scenario:

You're tasked with testing an API endpoint that accepts user input for creating a new resource.

Describe how you would design test scenarios to validate various types of input data (e.g., strings, numbers, special characters) and ensure the API responds appropriately to invalid input.

👉Error Handling Scenario:

Consider a scenario where the API encounters an internal server error (HTTP status code 500) during the processing of a request.

How would you verify that the API returns the correct error response with relevant error messages, and how would you handle and report such errors in your testing framework?

👉Concurrency Scenario:

How would you approach testing the API's behavior under high load or concurrent requests?

Describe the strategies and tools you would use to simulate concurrent requests and analyze the API's performance, scalability, and response times under varying levels of load.

👉Data Consistency Scenario:

Imagine you're testing an API that interacts with a database to retrieve or manipulate data.

How would you design test scenarios to ensure data consistency between the API responses and the underlying database state? Do consider scenarios involving CRUD operations, data integrity checks.

These questions are into different aspects of API testing, including authentication, input validation, error handling, performance testing, and data consistency checks, which are crucial for ensuring the reliability and functionality of APIs in various scenarios.

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