I was asked about the most challenging project in my past experience. I talked about one project I accomplished, but I supplemented (which I really shouldn't have done so) an unsuccessful research project which I didn't put on the resume. That project was too hard for me to finish in a few months, so I eventually abandoned it. It is not uncommon that a research-oriented project fails in the end, but the interviewer might think you are a loser.
If you have 9 balls. and one of the ball is lighter. All others are equal in weight. So then, if you have a single scale and you are given two turns how would you find the lighter ball?
How will you manage multilingual (Hundreds of languages) testing of a Product in a very very short notice i.e. you cannot test all of them.
How would you test a function that determines if 3 integers represent the sides of a triangle
Find two numbers that sum to zero in a list.
Technical questions and ability to discuss your results.
The most unexpected question had to do with designing a messaging system, and involved some concepts I wasn't familiar with. This was my last interview and the interviewer was very friendly and patient, and guided me throughout the process.
What is the worst mistake you have ever hid?
Shortest path question.
Question about Data encryption over HTTPS websites and he drilled really deep asking questions like how secret and private keys work, how the secret key is shared, and how encryption of data actually takes place on websites.
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