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No thanks, I'll skip the free cheat sheetsEvery SDET interview is a funnel of distinct rounds, each testing something different. Here is what each stage tests, how to clear it, and where candidates lose.
Most candidates prepare topics but not rounds — then get caught out by the online assessment they never practised, or the manager round they treated as a formality. An SDET interview is a funnel of distinct stages, each testing something different, each with its own pass rate. Know the shape and you stop losing offers to surprises.
The full funnel, top to bottom — what each stage tests, how to prepare, and roughly what share of candidates clear it.
What it tests
Aptitude, basic coding, and MCQs on testing and Java. This is an automated gate that filters hard and early.
How to prepare
Practise on platforms like InfyTQ, TCS NQT mocks and aptitude papers. Solve around 10 easy problems for speed, and revise Java output-based questions.
Drill the Java simulator →What it tests
Communication, your background, role fit, and CTC expectations. Not technical — but people fail it by being vague or unprepared on salary.
How to prepare
Prepare a crisp 90-second "about me". Research the company. Know your expected CTC and be ready to state it calmly. Practise speaking clearly.
See strong vs weak answers →What it tests
Manual-testing concepts, Java OOP, Selenium basics and testing terminology. The fundamentals round.
How to prepare
Drill the Java, Manual Testing and Selenium simulators. Write test cases on paper, and be able to draw a Page Object Model structure from memory.
Drill the Selenium simulator →What it tests
TestNG, BDD/Cucumber, framework design, and sometimes live coding. Where shallow framework knowledge shows.
How to prepare
Drill the TestNG and Framework Design simulators and your BDD knowledge. Have your laptop ready to demo your GitHub project, and practise writing code on paper.
Drill the Framework simulator →What it tests
API testing, RestAssured basics, CI/CD awareness and early system-design thinking. Common at product companies.
How to prepare
Drill the API simulator and the API Scenario Lab, and have a Postman demo ready. Write a basic RestAssured test from memory, and know your status codes cold.
Open the API Scenario Lab →What it tests
Culture fit, salary negotiation, joining timeline and long-term goals. High pass rate — but careless answers still sink strong candidates here.
How to prepare
Work through the behavioural / STAR guide. Research the company culture, prepare your salary justification, and have thoughtful questions ready to ask.
Read the STAR guide →The two lowest-pass-rate stages are usually the online assessment (a timed gate that filters hard early) and the automation deep-dive (where shallow framework knowledge shows). Front-load your prep there. The HR and managerial rounds have high pass rates, but careless answers on notice period, expectations or "why leaving" can still sink a strong candidate — so prepare those too.
BeforeSuite → BeforeTest → BeforeClass → BeforeMethod.Every round ends with "any questions for us?" — treat it as a scored moment, not a formality.
Match your prep to the stage you are facing.
Timed Mock Interview → Company Questions What to SayTypically four to six stages: an online assessment, a recruiter/HR screen, one to three technical rounds, and a managerial/HR final. The full funnel with pass rates is above.
Usually the online assessment (a timed gate that filters early) and the automation deep-dive round. Those have the lowest pass rates, so prioritise them.
It varies by stage — the online assessment often clears under half of candidates, while the final HR round has a high pass rate. The rough rate per round is shown above.
Match prep to the stage: aptitude and speed for the assessment, the topic simulators for the technical rounds, and the behavioural guide plus the "what to say" answers for the HR and managerial rounds.
Round formats and pass rates are indicative and shift by company and year — treat them as a guide.