SDET and QA Automation Engineer Interview Questions (With Answers)

“How would you test an elevator?”

I’ve watched this question trip up people who are clearly good at the job. Someone who has spent years keeping a Cypress suite alive hears “elevator” and starts firing off cases in no particular order: press the button, press it twice, what if there’s a fire, what if a kid hits every floor. Three minutes in they’re still going. The interviewer stopped writing a while ago, and the note that does get written is short: “no structure.”

System Design Interview Template: A 45-Minute Step-by-Step Framework

“Design a URL shortener.”

Twelve minutes later you’ve drawn three databases, a queue and something labeled “magic,” and the interviewer asks, very politely, how many reads per second you’re designing for. You never asked. Now you’re doing math backwards while the clock keeps going.

That’s the most common way system design rounds go wrong. Not a lack of knowledge. A lack of order. People who know plenty about caching still skip requirements, burn fifteen minutes on estimates, or never reach the deep dive.

Java Interview Questions for Experienced Backend Developers (With Answers)

You’ve been shipping Java services for years. Then someone on a video call asks why a HashMap lookup returned null for a key you definitely put in, and you hear yourself say “something with hashing?”

That’s the trap with Java interview questions for experienced developers. You know this stuff in your hands. You’ve fixed the bug. But explaining it out loud, in order, while a stranger takes notes is a different skill, and most people never practice it.

Meta Software Engineer Interview: Coding, System Design and Behavioral (E3-E5)

Do the math on Meta’s own prep guide and it gets uncomfortable fast. About two problems in about 40 minutes. That’s roughly twenty minutes each, including clarifying, coding, testing and explaining complexity while someone watches.

Most people who stumble in a Meta software engineer interview could have solved the problems. They run out of clock on problem two.

This guide covers the screen and full loop, system design versus product architecture, Meta’s AI-assisted coding format, behavioral signals, and a practice plan. I use Meta’s Careers pages and the prep guides linked from them, and label what comes from candidate reports. One caveat: E3, E4 and E5 come up constantly in prep forums, but Meta’s public guides don’t define those levels. Treat the level notes below as a careful read, not a rulebook.

Amazon SDE Interview: Online Assessment, Loop and Leadership Principle Questions

The email lands on a Tuesday. A HackerRank link, a seven-day window, and a note that the 90-minute timer keeps running once it starts, even if you close the tab.

That’s how a lot of Amazon SDE interviews begin. No friendly call first. Just you, two coding problems, and a compiler that has to accept your code before a human ever reads it.

Google Software Engineer Interview: Coding Rounds, Googleyness and How to Practice

So the recruiter has booked your phone screen. Forty-five minutes, a shared Google Doc, and none of the stuff you’re used to leaning on: no autocomplete, no run button, nobody to tell you that you forgot a closing bracket on line nine except the person watching you type.

You probably know Dijkstra cold, and that’s not really the issue. The thing nobody tells you up front is how much of the score depends on whether you talked while you typed, as opposed to whether the final function would have compiled first time, and I think most candidates get that balance backwards. A messy-but-correct path that you narrate the whole way tends to land better than a tidy answer you produced in silence.