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4,403 sdet interview questions shared by candidates

Questions were centered around system design and backend technologies, such as why MongoDB was created, how it works internally, and the purpose of Kafka compared to other tools. These questions were more aligned with backend or architectural roles.
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Senior SDET

Interviewed at Marriott Tech Accelerator

4.5★
Apr 17, 2026

Questions were centered around system design and backend technologies, such as why MongoDB was created, how it works internally, and the purpose of Kafka compared to other tools. These questions were more aligned with backend or architectural roles.

Redbus Interview Questions: 1. Self-introduction 2. Detailed discussion on your project 3. Tech stack used and in-depth project-related questions 4. Object-Oriented Programming principles with real-life examples and code implementation 5. Types of joins in DBMS and their use cases 6. SQL query to perform a join on two tables 7. Code to find the frequency of an alphabet in an array 8. Logic to swap two numbers without using a temporary variable 9. Explanation of client-server interaction model
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Software Development Engineer In Test (SDET)

Interviewed at redBus India

4.4★
Jul 3, 2025

Redbus Interview Questions: 1. Self-introduction 2. Detailed discussion on your project 3. Tech stack used and in-depth project-related questions 4. Object-Oriented Programming principles with real-life examples and code implementation 5. Types of joins in DBMS and their use cases 6. SQL query to perform a join on two tables 7. Code to find the frequency of an alphabet in an array 8. Logic to swap two numbers without using a temporary variable 9. Explanation of client-server interaction model

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