What a whiteboard interview actually tests
A whiteboard interview asks you to solve a problem, often technical or logical, live in front of an interviewer using a whiteboard or shared screen, testing your live reasoning process at least as much as your final answer. Common in software engineering and technical roles, but also used for strategy and consulting-style case interviews, the format specifically rewards visible, structured thinking over a silently-produced correct answer.
How to approach the problem
Talk through your thinking out loud continuously, even when you are unsure, since silence gives the interviewer nothing to assess and can appear as if you are stuck rather than thinking. Clarify the problem and any ambiguous requirements before diving into a solution, break the problem into smaller steps visibly on the board, and narrate trade-offs as you consider different approaches rather than jumping straight to your first idea.
Common mistakes to avoid
Going silent for long stretches while thinking is one of the most common mistakes, since interviewers cannot assess reasoning they cannot see or hear. Rushing to write a solution before fully understanding the problem, and failing to test or sanity-check your own answer once written, are also frequent, avoidable errors that a calmer, more structured approach prevents.
How to prepare
Practise solving problems out loud, ideally in front of another person, since narrating your thinking is a distinct skill from solving problems silently on your own. Practise on an actual whiteboard or shared screen if possible, since writing and talking simultaneously under observation feels different from solving a problem alone on paper.