Sdet Interview Questions

4,407 sdet interview questions shared by candidates

HackerRank: Input: A bag contains n = 6 items with IDs [1, 1, 1, 2, 2, 3], and m = 2 items can be removed. Output: What is the minimum number of different IDs the final bag can contain? Problem Solving: Input: Given the string a3c9b2c2, compress it by summing the frequencies of the same characters. Output: Return the compressed string: a3b2c10.
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Senior SDET

Interviewed at Fivetran

3.5
Sep 26, 2024

HackerRank: Input: A bag contains n = 6 items with IDs [1, 1, 1, 2, 2, 3], and m = 2 items can be removed. Output: What is the minimum number of different IDs the final bag can contain? Problem Solving: Input: Given the string a3c9b2c2, compress it by summing the frequencies of the same characters. Output: Return the compressed string: a3b2c10.

1. Tell me about yourself and your roles & responsibilities 2. Write a Java program to find the maximum sum subarray 3. Example of implementing multiple inheritance in Java 4. Why is String immutable? How does it differ from String Buffer? 5. How do you prepare test cases when requirements are unclear? 6. If 10 test cases fail inconsistently, how do you debug them? 7. Explain the Bug Life Cycle 8. How do you wait in Selenium until a file download is fully complete? 9. What is the purpose of DataProviders in TestNG? 10. Challenges faced while working on automation frameworks 11. What are TestNG Listeners? How do you implement them? 12. Write an XPath using the sibling axis 13. Describe a situation where you disagreed with a developer and how you handled it 14. Explain the Factory Design Pattern 15. When do you stop testing a feature? 16. How do you automate calendar controls in Selenium? 17. How do you get attribute values in Selenium? 18. Explain multithreading in Java 19. Global variables vs. environment variables in Postman 20. If a GET API takes 1 minute, can another HTTP method be used for quicker validation? 21. What is the purpose of the TRACE HTTP method? 22. How do you ensure test cases are complete and provide maximum coverage? 23. How do you test security vulnerabilities in an application? 24. Find duplicates in a list using Java Streams
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SDET-2

Interviewed at ZEE5

3.1
Dec 7, 2025

1. Tell me about yourself and your roles & responsibilities 2. Write a Java program to find the maximum sum subarray 3. Example of implementing multiple inheritance in Java 4. Why is String immutable? How does it differ from String Buffer? 5. How do you prepare test cases when requirements are unclear? 6. If 10 test cases fail inconsistently, how do you debug them? 7. Explain the Bug Life Cycle 8. How do you wait in Selenium until a file download is fully complete? 9. What is the purpose of DataProviders in TestNG? 10. Challenges faced while working on automation frameworks 11. What are TestNG Listeners? How do you implement them? 12. Write an XPath using the sibling axis 13. Describe a situation where you disagreed with a developer and how you handled it 14. Explain the Factory Design Pattern 15. When do you stop testing a feature? 16. How do you automate calendar controls in Selenium? 17. How do you get attribute values in Selenium? 18. Explain multithreading in Java 19. Global variables vs. environment variables in Postman 20. If a GET API takes 1 minute, can another HTTP method be used for quicker validation? 21. What is the purpose of the TRACE HTTP method? 22. How do you ensure test cases are complete and provide maximum coverage? 23. How do you test security vulnerabilities in an application? 24. Find duplicates in a list using Java Streams

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