Interview Prep
System design interview questions and how to answer them
System design interviews are open-ended by design. The question is rarely what you build. It's how you navigate a problem with no single right answer. These questions cover the scenarios that come up most at mid-level and above.
PrepVault maps the JD to what you should study and keeps your answers in one place. Free to start.
Common mistakes
- Designing before clarifying requirements
- Skipping scale estimates and tradeoffs
- Forcing one answer instead of weighing options
What interviewers weigh
- How you navigate an open-ended problem
- Tradeoffs on scale, storage, and caching
- How you justify your decisions