Crack SDET Coding Rounds with These 25 Interview Questions With Solutions
Hey friends 👋
If you're preparing for SDET roles at top product-based companies, this video is designed exactly for you.
Over the past few weeks, I’ve gone through countless interview problems and curated 25 high-yield coding questions that are frequently asked in real interviews. These cover a wide range—from Arrays and Strings to Stack logic and Pattern-based problems.
But this isn’t just a list of problems.
👉 Each question is broken down step-by-step, explained like I’m teaching a friend—so you can actually understand the logic behind the code.
💡 Perfect for you if:
You’re a manual tester transitioning into automation
You’re an experienced SDET gunning for 30+ LPA roles
📚 What You’ll Learn:
Real-world string & array questions with tricks that actually work
How to crack stack-based and pattern-based interview logic
00:00 - Intro
00:58 - Swap Two Numbers
49:35 - Reverse an Integer
1:28:34 - Factorial of a Number
1:37:14 - Length of Last Word in String
1:55:34 - Even Words from a String
2:27:08 - Missing Number in Array
3:00:39 - Sum of Array Elements
3:18:58 - Second Largest Element
3:36:46 - Move All Zeros to End
3:54:56 - Frequency of Characters
4:15:23 - String 101
4:38:53 - Reverse Only Letters
4:57:39 - Reverse Vowels
5:18:23 - Replace Vowels with ‘x’
5:31:11 - Pangram Check
5:44:07 - Pangram (Solution 2)
5:52:27 - Valid Parentheses
6:12:13 - Stack 101
6:42:05 - Special Character Frequency
6:59:29 - Frequency of Characters (Revisited)
7:19:55 - Numeric Hollow Pyramid
7:35:49 - Roman to Integer
7:58:31 - Leaders in Array
8:22:31 - Unique Characters from String
8:52:00 - Mountain Array Check
🎁 A Few Tips:
Try solving each problem before watching the solution.
Treat this like a mock technical round.
Drop a comment below with your favorite question or the one that stumped you most!
Let’s get better together 💻🔥
Happy coding!
— Jatin
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