The interview process typically begins with an HR phone interview. This is followed by two Skype interviews with junior engineers, then two back-to-back Skype interviews with senior engineers, who will likely be your managers.

The HR interview is generally straightforward if you have memorized trivia on Unix, networks, and simple data structures. If you pass, you will be informed of the next steps over the phone.

Each subsequent technical interview starts with: "Tell me about yourself?" and "Why Yelp?" followed by one or two trivia questions. This segment usually takes 15-20 minutes. The remainder of the interview focuses on a programming exercise, which is considered quite easy if you are proficient with basic data structures and algorithms. The interviewers will then ask numerous follow-up questions, such as: Is this optimal? What if the data is large? How would you represent this in a database?

The day I was interviewed by the senior engineers was not my best.

Given a list of numbers, write a function that combines those numbers in an arithmetic expression to obtain the value T. The allowed operations are +, -, *, and /. Parentheses are also allowed.

Given a list of n words. Print the most frequent 10.