QA / SDET Engineer Interview Prep
A curriculum for Software Development Engineer in Test and QA-engineer loops, which blend a real (if lighter) coding bar with deep testing judgment. Strengthens the coding floor, builds the systems and API knowledge test engineers are expected to reason about, develops object-oriented and framework design sense for test automation, and finishes with the quality-ownership behavioral themes that define the role.
Coding floor
SDET loops include a coding round - usually string and collection manipulation rather than hard algorithms. Get the fundamentals solid.
- 01MCQAlgorithms questions (20 suggested)Multiple choice category
- 02MCQData Structures questions (20 suggested)Multiple choice category
- 03CodeValid ParenthesesCoding · Easy
- 04CodeValid AnagramCoding · Easy
- 05CodeFirst Unique Character in a StringCoding · Easy
- 06CodeLongest Substring Without Repeating CharactersCoding · Medium
- 07CodeGroup AnagramsCoding · Medium
Systems and API knowledge
Test engineers reason about the system under test - HTTP semantics, status codes, database state, and where things break. Build the breadth that lets you design good test cases.
Test framework design
Automation is software. SDETs are graded on whether they can design a maintainable test framework - page objects, fixtures, fakes - so object-oriented design matters. Then reason about testing a real system with rate limits and retries.
Behavioral: quality ownership
QA and SDET loops screen hard for the engineer who owns quality and raises the bar without being adversarial. Bring stories about catching the bug others missed and pushing back on a risky ship.
Browse other learning paths
Three role-targeted paths are live: Backend, SRE / DevOps, and ML Engineer. More are on the way - if you have a role you want covered, let us know.
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