I was contacted by a recruiter and asked the same questions as mentioned in previous comments. It was basic CS trivia.

I was then scheduled for a Skype interview with an engineer.

The engineer asked general questions about my past experiences and previous positions, and a coding question using an online shared notepad with a compiler. This allowed us to execute the code I wrote and test it for some use cases.

Even though I managed to correctly solve the problem without syntax or logical errors, and all the test cases passed successfully on the very first try, I was rejected.

Absurd.

Given a list of strings, write a function to calculate the longest common prefix (LCP) of all those strings.