A behavioral mock interview with AI works when you answer out loud and the interviewer digs into what you personally did. On Devana, an AI interviewer named Josh asks behavioral questions by voice, follows up on vague answers, and scores each answer out of 100: 40% on delivery and 60% on its STAR content. Free accounts get 3 interviews a month, up to 20 minutes each.
What a behavioral round is really testing
Behavioral questions look like small talk with a format. They are not. Each one checks a trait the company hires for: ownership, judgment under ambiguity, how you handle conflict, whether you learn from mistakes. The interviewer is listening for evidence, and the evidence is what you did, not what your team did.
That is why STAR (situation, task, action, result) helps, and also why it is not enough on its own. Most engineers spend most of an answer on the situation and too little on the action, which is the only part that shows how they work. Behavioural interview questions for engineers goes into that ratio, and how to answer "tell me about yourself" covers the opening question that sets up the rest.
How Devana runs a behavioral round
- An engineering manager, not a quiz. Josh plays a senior engineering manager. He asks one question at a time and waits for your full answer.
- Follow-ups on every answer. One or two probing questions, such as "What was your specific role?", "What was the outcome?" or "What would you do differently?". A vague answer gets "Can you be more specific about what you did, not what the team did?"
- Company question sets. The bank has 302 behavioral questions across 46 company sets, such as Amazon questions built on its Leadership Principles.
- Questions from your own career. A resume-based behavioral round asks about situations from your real roles and projects.
- Length. Up to 30 minutes on the Sprint Pass and Pro, and up to 20 minutes on the Free plan.
How behavioral answers are scored
Each answer is scored out of 100 on nine metrics, five for delivery and four for content:
| Metric | Half | Points | What earns them |
|---|---|---|---|
| Verbal clarity | Delivery (40%) | 20 | Clear, concise speech without rambling or filler |
| Active listening | Delivery (40%) | 20 | Answering the question asked, and the follow-ups |
| Composure | Delivery (40%) | 20 | Staying poised and confident under pressure |
| Pacing | Delivery (40%) | 20 | A natural pace: pauses, but no long dead air |
| Structure | Delivery (40%) | 20 | A logical order that is easy to follow |
| Situation and task | STAR content (60%) | 25 | Concise context, stakes and constraints |
| Action and ownership | STAR content (60%) | 35 | What you personally did: "I", not "we" |
| Result and impact | STAR content (60%) | 25 | Measurable outcomes |
| Learnings | STAR content (60%) | 15 | What you learned, or would do differently |
From the grader's rubric. Each half adds up to 100; the answer's score is 40% of delivery plus 60% of content.
Action and ownership carries the most points on purpose: it is the part interviewers are assessing. The report lists what raised and lowered each answer's score, so you can see whether your "I" crept back into "we".
A practice routine: six stories, three sessions
You do not need a hundred prepared answers. You need about six stories you can tell from different angles:
- a hard technical problem you solved
- a conflict with a colleague or another team
- a failure or mistake, and what changed after it
- a time you led without formal authority
- a decision you made with incomplete information
- the project you are proudest of
Then use your sessions in order:
- Tell the stories. Do not aim for polish. Read the lowerers afterwards: most people find their situation runs long and their result is vague.
- Compress them. Bring each story to about two minutes, with the action as the longest part and a number in the result.
- Aim at the company. Use its company question set, and map each story to the values it hires for. The Amazon guide shows how that works with the Leadership Principles.
The hardest question in most sets is your biggest failure; how to frame your past failures deals with it.
Mistakes that cost the most points
- "We" all the way through. It hides the one thing being assessed.
- No result, or a result without a number. "It went well" is not an outcome.
- A long run-up. Two minutes of background before anything happens loses the interviewer and the points for structure.
- Answering the prepared question. When the follow-up asks something else, answer that. Active listening is scored.
- No lesson. A failure story without what changed afterwards reads as a story about bad luck.
Other ways to practise behavioral answers
As of October 2026, from each provider's own site: Yoodli runs AI roleplays for interviews and public speaking, with a free Starter plan of up to 5 roleplays in total and Pro at $8 a month billed annually. Huru is free for job seekers, with unlimited mock interviews for any role. Google's Interview Warmup, once the default free option, no longer loads; here are the Google Interview Warmup alternatives. And a peer mock on Aced, where Pramp now lives, puts a person on the other side, 5 times a month on its free plan.
Frequently asked questions
Can an AI interviewer judge a behavioral answer?
It can judge the things that most often sink one: an answer with no clear situation, an action told as "we" with nothing you did yourself, no result, or no lesson. It also asks the follow-up a real interviewer would. It cannot tell you whether a story fits one hiring manager's taste, which no practice tool can.
How long is a behavioral mock interview on Devana?
Up to 30 minutes on the Sprint Pass and Pro, and up to 20 minutes on the Free plan. That is long enough for several questions with follow-ups.
Does Devana have company-specific behavioral questions?
Yes. The question bank has 302 behavioral questions across 46 company question sets, such as Amazon questions built on its Leadership Principles. Company question sets are on the Free plan.
How is a behavioral answer scored?
Out of 100. Forty percent is delivery: verbal clarity, active listening, composure, pacing and structure, 20 points each. Sixty percent is the STAR content: situation and task 25, action and ownership 35, result and impact 25, and learnings 15.
Should I memorise my behavioral answers?
No. Memorise the stories, not the words. Know six or so stories well enough to tell each in about two minutes from any angle, and practise them out loud until the structure is automatic. A recited answer falls apart at the first follow-up question.