100+ Most Asked Java Problems for SDET Interviews

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100+ Most Asked Java Problems for SDET Interviews
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This comprehensive guide covers 100+ Java coding problems, focusing on arrays, strings, data structures (Set, HashMap, LinkedList, Stack, Queue, etc.), and algorithms—all designed to help SDETs excel in coding interviews. Whether you're preparing for FAANG companies, product-based firms, or service-based roles, this collection will give you the hands-on practice needed to ace SDET coding rounds.


📌 What’s Inside?

✅ Array Problems: Sorting, searching, two-pointer, subarrays, and matrix operations.

✅ String Problems: Anagram, palindrome, substring, and pattern matching.

✅ HashMap & Set: Frequency count, duplicates, and unique elements.

✅ LinkedList: Reversal, cycle detection, merging, and sorting.

✅ Stack & Queue: Parentheses validation, LRU cache, and BFS/DFS problems.

✅ Binary Tree & Graphs: Traversals, lowest common ancestor, and shortest path algorithms.

✅ Dynamic Programming & Recursion: Fibonacci, subsets, and longest subsequences.


🔹 Who Is This For?

  • Aspiring SDETs looking to clear technical interviews.
  • Test automation engineers who want to enhance coding skills.
  • Anyone preparing for Java-based coding challenges.

📥 Get ready to master Java coding and crack your SDET interviews with confidence! 🔥

What are people saying

I genuinely loved it! The whole experience was so smooth and enjoyable. She made everything easy to understand. And she guide me properly, what's the market standard............. Super friendly, helpful, and full of insights — Thank you for such a positive experience! Thanks again..............!!!
Amit Jangra
Oct 2025
The Session with Anshul Mam was extremely helpful for me. Through the Mock Interview I got a detailed analysis of the points where I struggle during the interview and I highly recommend her to any candidate who is aspiring to Switch and clear the interviews both for a QA Automation and an SDET Role.
Anonymous
Mar 2025
It was my Second Session with Mam and extremely useful as usual: Service:--> Mock Interview I would recommend all the aspiring Automation / Manual QAs to have a connect with her
Anonymous
Apr 2025
I highly recommend Ms. Anshul Agarwal for anyone looking to transition from Manual QA to SDET/Automation Testing. She not only guides you through the process but also helps you understand real-world scenarios that online videos often miss. Her detailed approach and transition plan has already started making difference in my learning journey. She has a deep understanding of the testing needs across big, medium, and startup companies. If you're looking for structured guidance, she is the go-to person for a seamless transition.
Anonymous
Dec 2024
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