10 Common Interview Mistakes (And How to Fix Them Before Your Next Interview)
By Rehearsa Team · 2026-08-16
Most interviews are not lost on a single impossible question. They are lost on a handful of small, repeatable mistakes — answers that ramble, stories with no result, body language that reads as low confidence, questions at the end that sound like nobody prepared.
We reviewed thousands of interview practice sessions on Rehearsa and pulled out the ten mistakes that cost candidates the most points. Each one below comes with the fix, so you can work through this list before your next interview.
1. Rambling instead of answering
The most common mistake by far. A question that should take 90 seconds turns into a four-minute monologue with three tangents, and the interviewer loses the thread long before you land the point.
Rambling is rarely a knowledge problem. It is a structure problem: without a plan for where the answer ends, you keep talking until something feels like a conclusion.
Fix: Decide your last sentence before you start. For behavioural questions, use the STAR method so every answer has a built-in exit. Aim for 60–120 seconds and stop — silence after a clean answer is confident, not awkward.
2. Giving answers with no evidence
"I'm a strong communicator." "I work well under pressure." "I'm very organised." These are claims, not evidence, and interviewers discount them instantly because every candidate says them.
Fix: Replace every adjective with a story. Instead of "I'm good under pressure," describe the incident, what you decided, and what happened. One specific example is worth ten self-descriptions. The STAR examples library shows what that looks like across 25+ answers.
3. Missing the result
Candidates describe the situation and the work in detail, then finish with "…and it went well." The interviewer has no way to score the outcome, so the answer reads as average even when the work was strong.
Fix: End every story with a number, a comparison, or a concrete consequence — time saved, error rate reduced, revenue moved, customer retained, process adopted by the team. If you have no metric, use a before-and-after.
4. Not researching the company
Generic answers signal generic interest. If your reasons for wanting the job would apply to any employer in the sector, the interviewer will assume you are applying everywhere.
Fix: Spend 30 focused minutes before the interview on the company's product, recent announcements, and the exact wording of the job description. Bring two specifics into your answers: something they do that you can speak about credibly, and how your experience connects to a responsibility listed in the ad.
5. Talking badly about a previous employer
Criticising a former manager, team, or company is one of the fastest ways to raise a flag. Even when your complaint is fair, the interviewer only hears how you might talk about them later.
Fix: Frame every departure or difficulty around what you learned and what you are moving toward. Neutral facts, no blame: "The role narrowed after a restructure, and I want to be closer to product decisions again."
6. Weak body language
Slouching, no eye contact, a flat voice, or hands fidgeting off-camera all reduce perceived confidence — often more than the content of your answers. In remote interviews this is amplified: the camera crops everything except your face and shoulders.
Fix: Sit upright with shoulders back, look into the camera lens (not your own video), and keep your hands visible and still. Practise on video and watch it back — presence is measurable, and it improves fast once you can see it.
7. Answering the question you wish they had asked
Under pressure, candidates reach for their favourite story regardless of fit. Asked about conflict, they tell a leadership story. Asked about failure, they tell a story where nothing actually went wrong.
Fix: Before speaking, silently name the competency being tested — conflict, failure, ambiguity, influence, prioritisation, resilience. Choose the story that demonstrates that, even if it is not your most impressive achievement. The common STAR mistakes guide covers this trap in more detail.
8. Failing to admit a real failure
"My biggest weakness is that I care too much" is a non-answer, and interviewers hear it several times a week. It signals either low self-awareness or an unwillingness to be honest.
Fix: Pick a genuine, non-disqualifying weakness or failure, own it in one sentence, then spend the rest of the answer on what you changed. The correction is what gets scored, not the mistake.
9. Having no questions at the end
"No, I think you covered everything" ends the conversation on a flat note and suggests low engagement.
Fix: Prepare four questions and ask two or three. Good ones: what does success look like in the first 90 days, what is the biggest challenge facing the team right now, how does this role interact with other functions, what would make you look back in a year and say this hire went well.
10. Not practising out loud
Reading your notes silently is not preparation. The gap between knowing a story and delivering it clearly under pressure only closes with repetition — out loud, on camera, in real time.
Fix: Run at least three full practice sessions before an important interview, recording each one. Watch for pace, filler words, eye contact, and whether each answer actually landed a result. Rehearsa scores all of these automatically so you can see exactly where the points are leaking.
A pre-interview checklist
Work through this the day before:
| Area | Check |
|---|---|
| Structure | Every behavioural answer follows STAR and ends with a result |
| Evidence | No claim without a specific example behind it |
| Research | Two company-specific points ready to use |
| Framing | Neutral, forward-looking reason for leaving your last role |
| Presence | Upright posture, camera-level eye contact, hands visible |
| Questions | Four prepared, two to three asked |
| Practice | At least three recorded sessions reviewed |
Want the structure part handled for you? Grab the free STAR Method Template Worksheet and fill in three stories before your next interview.
The pattern behind all ten
Nearly every mistake on this list comes from the same root: preparing content but not delivery. Candidates who fix these mistakes are not smarter or more experienced — they have simply heard themselves answer before, and adjusted.
Pick the two mistakes you recognise most, record yourself answering three questions each, and watch the recordings back. That single hour is usually worth more than another week of reading. When you are ready, start a free practice interview and see your scores for structure, relevance and presence in minutes.