How to run mock coding interviews that actually help: setting up a realistic session, a repeatable structure to follow every time, what to practice beyond the code, and how to get feedback you can act on.
What a pair programming interview is, what interviewers are really grading, and how to practice for one with a friend on a shared coding pad so collaboration feels natural on the day.
ViewHow to run a mock interview with a friend that actually works: pick a partner who pushes you, swap interviewer roles, time each round, and review the playback.
ViewHow Codex Interview's real-time collaboration works: the desktop app, the shared coding pad, and why room-scoped screen sharing and session playback exist.
ViewA mock coding interview is a practice run of a real technical interview: someone gives you a problem, you solve it out loud in a shared editor while they watch, and afterward you talk about what went well and what didn't. It sounds simple, but done consistently it's the single highest-leverage thing you can do before an interview that counts.
The reason is that a coding interview isn't really a test of whether you can solve the problem alone. It's a test of whether you can solve it while someone is watching, asking questions, and judging how you think. That's a separate skill from grinding problems by yourself, and the only way to train it is to reproduce the pressure on purpose.
Solving problems on your own builds your raw problem-solving. Mock interviews build everything around it:
If you only remember one thing: practice the performance, not just the puzzle.
The closer your practice conditions are to the real thing, the more the practice transfers. Aim for:
This is exactly the setup Codex Interview is built for: you share a live coding pad with someone you trust, they see every keystroke as you type, and you both work in the same environment you'll use for the real interview. Because it runs as a desktop app beside your call, you can practice over Zoom, Meet, or Teams the same way the interview will actually happen. If you want the mechanics, here is how Codex Interview works.
Improvised mocks drift into casual pair-programming. Give every session the same shape so it stays honest:
Run the same loop every time and you build muscle memory for the shape of a round, not just for individual problems.
Most candidates over-index on algorithms and under-practice everything else. In a debrief, grade yourself on:
These are the exact things interviewers are trained to watch, and they're invisible when you practice alone.
Vague feedback ("that was good") is worthless. Structure it:
Then carry those three items into the next mock and check them off. Feedback you don't re-test is just conversation.
You have a few options, and they stack well:
If you go the friend-or-mentor route, the practical problem is usually the environment — you want a real shared pad, not a screen-share of someone's local editor. That's the gap Codex fills: a proper collaborative coding pad, an invite link your partner opens in any browser, and playback to review afterward. The same setup doubles as pair programming interview practice if that's the format you're preparing for.
You don't need a hundred mock interviews. You need enough that the format stops surprising you — that clarifying, narrating, and testing under a timer feel automatic instead of effortful. For most people that's somewhere between five and fifteen focused sessions, each with a real debrief and three things to fix.
Grind problems to build the raw skill. Run mocks to make sure it shows up when someone's watching. Do both, and the real interview stops feeling like a performance and starts feeling like another Tuesday.
Ready to run one? Set up your coding interview assistant, invite a teammate, and practice your next round for real.