A mock onsite interview is a full rehearsal of a real onsite loop: several timed rounds back to back, each with a different interviewer focus, short breaks in between, and a score for every round. With an AI mock interview tool you can run one on your own, in a single day or spread over a week, and finish with a clear list of what to fix before the real thing.
Single practice questions train your answers. A mock onsite trains the day: switching from coding to behavioral questions with ten minutes in between, keeping your energy up after lunch, and resetting after a round that went badly. This guide shows how to set one up with AI, gives a one-day schedule we wrote, and explains how to score and review it. For the real onsite, start with our guide on how to prepare for an onsite interview.
What is a mock onsite interview, and why run one?
An onsite is usually four to six interviews in one day, in person or on video. Our guide on how long an onsite interview is covers typical lengths and breaks. Candidates who prepare well round by round can still struggle on the day for reasons a single mock never tests:
- Stamina. Your fourth round gets less of you than your first unless you have practiced a long day.
- Context switching. Moving from a coding problem to a story about a conflict with a coworker takes practice.
- Recovery. One weak round can drag down the next if you have never practiced resetting.
- Timing. Finishing a 45-minute round on time, with minutes left for your questions, is a skill in itself.
A mock onsite makes all four visible, and AI makes it possible without asking four friends to give up an afternoon.
How to set up a mock onsite with AI
This setup uses CoPilot Interview's Mock Interview in the desktop app (Windows 10+ or macOS 12+). The same structure works with any AI practice tool that asks questions aloud and gives feedback.
- Get the real schedule. Ask your recruiter which rounds your onsite includes and in what order. Mirror that order in your mock.
- Load your résumé and the job description. Mock Interview builds its questions from both, so the rounds match the role you are interviewing for.
- Configure one session per round. For each round, set the level, the number of questions (3, 5 or 8), the mix (behavioral, technical, system design or coding), your coding language, and an optional focus.
- Give each round an interviewer focus. Mock Interview uses one AI interviewer, so different "interviewers" come from how you configure each round. Use the optional focus to steer it: ownership and conflict for a hiring-manager round, scalability for a system design round, a specific data structure for a coding round.
- Time everything. Use a timer for each round and each break, and stick to it even when a round runs badly.
- Answer out loud, as you would on the day. Mock Interview reads each question aloud and listens to your spoken answer. Coding questions never auto-submit, so you can think in silence before you answer.
Prefer nothing to install? The browser mock interview has 113 real questions across 9 tracks, including behavioral, system design, coding, data science and ML, frontend, DevOps, SQL, product and security, so you can assign a track to each round.
Plan your minutes. The free plan gives you 15 minutes a day with sessions up to 15 minutes, which suits one short round per day across a week. To run a full loop in a single day, you need longer sessions; Standard ($14.99/mo on sale, regular $19.99) has 60-minute sessions and up to 100 minutes a day. See pricing for every plan.
A one-day mock onsite schedule we wrote
This example is for a mid-level software engineer. AI session time is kept under 100 minutes; the rest of each round is spent on self-timed work, such as writing code or sketching a design, and on review. Swap the rounds to match your real onsite; for a PM, replace the coding rounds with product sense and execution, and for a data scientist, with SQL and statistics.
| Time | Round | AI setup | What you are practicing |
|---|---|---|---|
| 9:00 | Warm-up | No AI; reread your story list and notes | Starting the day calm and organized |
| 9:15 | Round 1: Coding | 3 coding questions, your language, focus on arrays and hash maps; about 25 minutes | Clarifying, thinking out loud, testing your code |
| 9:45 | Break | None | A 10-minute reset: water, walk, next round's notes |
| 9:55 | Round 2: System design | 3 system design questions, focus on scaling and trade-offs; about 25 minutes | Structuring a design and explaining trade-offs |
| 10:30 | Self-review | Read the scores and model answers for rounds 1 and 2 | Writing down one fix per round |
| 11:00 | Lunch | None; rehearse "Why this team?" out loud once | Resting and practicing informal conversation |
| 12:00 | Round 3: Behavioral | 5 behavioral questions, focus on conflict and failure; about 20 minutes | STAR stories under post-lunch fatigue |
| 12:30 | Break | None | A 10-minute reset |
| 12:40 | Round 4: Hiring manager | 5 behavioral questions, focus on ownership, motivation and goals; about 20 minutes | Connecting your experience to this team's needs |
| 1:10 | Debrief | Read the report cards | Scoring the whole day and choosing what to practice next |
On the free plan, run the same four rounds on four days, one 15-minute round per day with 3 questions each, and keep the order. Lunch on a real onsite is part of the day too; our guide to lunch interview etiquette covers it.
How do you score each round of a mock onsite?
Mock Interview scores each spoken answer out of 10, with what worked, what to fix and a model answer, and ends each session with a report card. Turn those into a one-line verdict per round, the way a real interviewer would. Our guide on how onsite interviews are scored explains the rating scales companies commonly use.
For each round, record:
- Average score across the round's answers.
- One strength you want to keep.
- One fix, written as an action: "State the time complexity before coding," not "be better at complexity."
- Your verdict: strong yes, lean yes, lean no or no, judged as if you were the interviewer.
Then look across the day. A drop in scores after lunch points to stamina; a low score in one round type points to a skill gap; a low score in the round after a weak one points to recovery. Each needs a different kind of practice. Our guide on how to track your interview practice progress shows how to log this over several weeks.
How to review your mock onsite
The review is where most of the improvement comes from. Give it at least 30 minutes.
- Compare your answer with the model answer. Don't memorize the model answer. Note what it included that yours didn't, such as a result with a number or a trade-off you skipped. AI answers can be wrong, so check anything technical and keep your own words.
- Listen to yourself. If you record the session on your phone, play back two answers: one strong and one weak. Listen for filler words, long setups and answers that run past two or three minutes. Our guide on how to record yourself for interview practice covers the setup.
- Rewrite one answer per round. Pick the lowest-scoring answer, rewrite the outline, and say it out loud twice.
- Re-run the weakest round the next day. Same configuration, new questions. If the score moves, the fix worked.
Simulate the hard parts on purpose
- Put your hardest round after lunch. If system design is your weakest area, practice it when you are least fresh.
- Practice a bad round. Pick a question type you dislike for one round, then practice the reset routine from our guide on what to do if you bombed one round of an onsite interview before the next.
- Match the format. For a virtual onsite, sit at the same desk with the same camera, lighting and headphones you will use on the day. For an in-person onsite, stand for the design round as you would at a whiteboard.
- Keep the breaks short. Real onsites rarely give you long gaps, so don't take 30-minute breaks in the mock.
Limits of a mock onsite with AI
AI practice is useful, but be clear about what it is not:
- One AI interviewer, not a panel. You won't get several voices or a human's follow-up instincts.
- No human feedback. There is no human coach reviewing your answers; for one round, consider a friend or colleague. Our comparison of an AI mock interview vs practicing with a friend covers when each helps most.
- Desktop app for the full flow. Mock Interview runs in the Windows and macOS app; the browser mock interview needs nothing installed.
- Daily limits on the free plan. 15 minutes a day is enough for one round per day, not a full loop.
Practice it
If you are new to AI practice, read what an AI interview assistant is first, then build up with our seven-day plan for practicing with an AI interview assistant before attempting a full mock onsite. Preparing for Amazon? Our Amazon mock interview guide adapts this approach to Leadership Principle questions. To start, download CoPilot Interview, a desktop AI interview assistant with a scored Mock Interview mode: rehearse out loud from your résumé and the job description, get each answer scored out of 10 with what to fix, free for 15 minutes a day with no account. Follow each employer's rules, and use AI to prepare beforehand.
Run your first mock round today
Start with one 15-minute round in CoPilot Interview's free AI mock interview. Answer out loud, get a score out of 10 with what worked and what to tighten, and build up to a full mock onsite. No account or credit card needed.
Try a free AI mock interviewFAQ
What is a mock onsite interview?
It is a rehearsal of a full onsite loop: several timed rounds back to back, each with a different focus, short breaks in between, and a score for every round. It trains stamina, context switching and recovery as well as your answers.
Can AI run a full mock onsite interview?
AI can run each round: it asks questions built from your resume and the job description, listens to your spoken answers and scores them. You set up the sequence of rounds, the timing and the breaks yourself.
How long should a mock onsite interview be?
Match your real onsite as closely as you can. The one-day schedule in this guide runs about four and a half hours with breaks, using under 100 minutes of AI session time. On the free plan, run one 15-minute round per day instead.
How many mock onsites should I do before the real one?
One or two full mock onsites in the final week is a reasonable target, after several days of practicing individual rounds. Use the scores from each to decide what to practice in between.
Is a mock onsite with AI as good as one with a person?
It is different. AI is available any time, scores every answer and gives a model answer, but it is one AI interviewer with no human feedback. Many people use AI for most rounds and a friend or colleague for one.
Can I do a mock onsite for free?
Yes, spread over several days. The free plan includes 15 minutes a day and all four modes, including Mock Interview, with no account. Running a full loop in one day needs longer sessions on a paid plan.