Sdet Interview Questions

4,404 sdet interview questions shared by candidates

Explain a scenario where multiple ads appear one-by-one on a website. How would you automate testing for this sequence, when the number of ads is unknown and each ad stays visible for 5 seconds�?If there are three textboxes with different IDs, but input only goes to one during automation, what could be the cause of the issue�?Can you describe how you would handle a situation where an API response does not match expected data? What troubleshooting steps would you take�?What types of bugs have you encountered during API testing, and how did you address them (e.g., missing functionality, poor error handling, performance issues)�?How do you perform API testing for negative cases and error scenarios�?Describe a challenge you faced during API test automation and how you resolved it�. Coding questions on array
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Software Development Engineer In Test (SDET)

Interviewed at NatWest Group

4
Oct 1, 2025

Explain a scenario where multiple ads appear one-by-one on a website. How would you automate testing for this sequence, when the number of ads is unknown and each ad stays visible for 5 seconds�?If there are three textboxes with different IDs, but input only goes to one during automation, what could be the cause of the issue�?Can you describe how you would handle a situation where an API response does not match expected data? What troubleshooting steps would you take�?What types of bugs have you encountered during API testing, and how did you address them (e.g., missing functionality, poor error handling, performance issues)�?How do you perform API testing for negative cases and error scenarios�?Describe a challenge you faced during API test automation and how you resolved it�. Coding questions on array

What are the main interfaces in the Java Collections Framework? What are the differences between HashSet and TreeSet? What is the difference between HashMap and Hashtable? Explain the difference between Comparator and Comparable. How do you iterate over a List in Java? What is the difference between Queue and Deque? What is the difference between ArrayList and Vector? How does a ConcurrentHashMap work?
avatar

Software Development Engineer In Test (SDET)

Interviewed at Mastercard

4.1
Jul 12, 2024

What are the main interfaces in the Java Collections Framework? What are the differences between HashSet and TreeSet? What is the difference between HashMap and Hashtable? Explain the difference between Comparator and Comparable. How do you iterate over a List in Java? What is the difference between Queue and Deque? What is the difference between ArrayList and Vector? How does a ConcurrentHashMap work?

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