Preparing for a job interview is not cramming questions the night before. It is three weeks of structured work, done in the right order, that turns a candidate who looks fine on paper into a candidate who stands out. Recruiters see the difference in 30 seconds — the clarity of your pitch, the precision of your examples, the relevance of your questions. All of it gets built before the session, not during.

This guide is the method used by Vocacia mentors — bankers, consultants, product managers, lawyers in current roles — when they prep their own mentees. It covers the research phase (3 weeks before), preparing your responses (2 weeks before), the mock-interview (1 week before), the day-of (timing, dress, presentation), during the interview (STAR, trick questions, salary), and the follow-up that turns a “we'll get back to you” into an offer. Plus 50 questions sorted by industry (banking, consulting, tech, marketing) with example response scripts.

TL;DR — the 60-second version

A standard job interview runs 30 to 60 minutes. You are evaluated on three axes: technical competence, motivation, and culture fit. Technical competence is prepared with industry- sorted question banks. Motivation is prepared by writing three precise reasons for the role and three for the company. Fit is prepared by reading the company's culture (LinkedIn employees, Glassdoor, recent press) and aligning your answers. The golden rule: prepare 12 standard answers and 8 questions to ask, written down, rehearsed out loud three times. No more.

3 weeks before: the research phase

Most candidates start prepping the day before. That is a strategic mistake. Three weeks out, you have time to do what others do not: understand the company beyond the “About Us” page.

The sources that actually matter. Your interviewer's LinkedIn (path, recent posts, projects mentioned). LinkedIn of 5 people on the team you would join. Glassdoor for employee reviews (the rating matters less than detailed comments). Press releases from the last 12 months. Earnings calls if the company is public. Podcasts or interviews with the CEO/founders from the last 6 months — you systematically find this year's strategic priorities there.

What you are looking for. A recent project the company shipped. A strategic shift (acquisition, fundraise, product launch, geographic expansion). A known difficulty (market loss, lawsuit, executive departure). The profile of a key employee you can mention. These elements show up later when you are asked “do you have any questions?” — the moment 90% of candidates fail.

The “research the industry” trap. If you are applying to investment banking, reading the Wall Street Journal for three weeks does not prepare you. Reading the annual reports of the last three deals the firm closed, yes. The difference: generality does not score, specific detail on their portfolio scores.

2 weeks before: prepare 12 standard answers

At this stage you have done your research. Now you write. Not think. Write, by hand or keyboard, your responses to 12 specific questions. The goal is not to memorize them — it is to structure your thinking and find the spots where you stumble.

The 12 questions to prepare (across industries)

These questions hit in 80% of interviews regardless of sector. For each, write a 60-90 second response, max.

  1. Tell me about yourself (the personal pitch, 90 seconds)
  2. Why this role? Three precise reasons, not generic
  3. Why our company? Reference to a recent project/article
  4. What are your strengths? Three, with concrete examples
  5. What are your weaknesses? A real one, not a disguised humble-brag
  6. Why are you leaving your current role? Without trashing the old one
  7. Describe a professional failure and what you took away from it
  8. Describe a project you are proud of with concrete numbers
  9. How do you handle conflict with a colleague?
  10. Where do you see yourself in 5 years? Aligned with the role, not adjacent
  11. What are your salary expectations? (see dedicated section below)
  12. Do you have any questions? Always yes, never about remote work first

How to introduce yourself in a job interview

“Tell me about yourself” is the worst-prepared question. Most candidates narrate their CV in 4 minutes. Mistake — the interviewer already has your CV. What they want is the story behind it.

The three-act structure (90 seconds max). Act 1: “Here is where I come from” — education + first career choice + why (15 seconds). Act 2: “Here is what I do now” — current role + one concrete project with measured impact (40 seconds). Act 3: “Here is why I want this role at your company” — explicit link between your trajectory and the opening (30 seconds).

Concrete example (junior finance). “I did my undergrad at LSE with a major in corporate finance — I wanted to understand how capital decisions get made. I did two internships: one in M&A at Lazard, where I worked on the sale of a mid-cap industrial, and one in private equity at Eurazeo, where I modeled three LBOs. Now I am looking to deepen the origination side — that is why your Industries department interests me specifically, especially after the X deal you closed in March.”

This kind of response scores because it is structured, numerical, and points at the company. No filler.

How to answer “what are your weaknesses?”

The worst answer: “I'm a perfectionist” or “I work too hard.” Everyone says that. The recruiter hears it ten times a day. It has become a negative signal.

The good answer. A real weakness + a compensation mechanism. Example: “I struggle to say no when I'm asked to take on projects adjacent to mine. Early on it cost me weeks of overload. Now I have a system: every Monday I list my priorities for the month, and when something new comes up, I say ‘yes if X drops off my list.’ It forces the trade-off conversation.”

What works in this structure: the weakness is credible, the mechanism shows professional maturity, and the last sentence shows you can make trade-offs — universally valued competence.

1 week before: the mock-interview with a mentor

This is the step 80% of candidates skip and that makes the difference on the day. Reading your answers in your head does nothing. Saying them out loud, under pressure, to someone who interrupts you and pushes back, yes.

Why a mentor in the role, not a friend. A friend will praise you. A mentor working in the sector will tell you the truth: your pitch is too long, your weakness response sounds rehearsed, your “why us” reason is interchangeable across 5 companies. That honesty costs 60 minutes and saves weeks of failed applications.

Vocacia is built around this need: our mentors are bankers, consultants, product managers and lawyers actively working at target firms — not professional coaches who have not seen an interview since 2018. They know what works this year, not five years ago.

How to structure a 60-minute mock-interview. 10 minutes of context (you explain the role, the firm, your application stack). 30 minutes of simulated interview — the mentor asks the real questions, you answer without pause. 20 minutes of debrief — feedback question by question, with specific improvement points. That last block creates most of the value.

Book a mock-interview session with a mentor in your target sector — hourly sessions, no commitment, transparent pricing per mentor.

How long does a job interview last?

The duration depends on the round and the sector. To calibrate your prep, here are the real ballpark figures.

The day-of: timing, dress, presentation

How to dress for a job interview in 2026

General rule: dress one notch above the normal outfit of the role. If the team wears t-shirts, wear a shirt. If they wear shirts, wear a jacket. This rule avoids 95% of the “looks out of place” trap.

Banking, consulting, law, senior finance: dark suit (navy or charcoal), white or pale-blue shirt, sober tie for men, structured suit or dress for women. Black leather shoes. No fashion statements.

Tech, startup, digital marketing: shirt without jacket, or thin sweater over a shirt. Chinos or clean dark jeans. Clean sneakers OK in most startups, matte leather otherwise. Avoid t-shirts even if the team wears them.

Creative industries (fashion, design, communications): personality OK, but polished. A stylish touch beats an over-classic outfit that signals you do not read the culture.

Video interview: same rules for the top half. Check your background 45 minutes before — clean, no laundry drying, natural light from the front. Avoid virtual backgrounds, they signal lack of effort.

Day-of timing

Arrive 10 minutes early. Not 30 — looks desperate. Not 5 — no time to handle a hiccup. Not late — disqualifying in 70% of cases.

For video: connect 5 minutes before, check sound and camera, close Slack/notifications/tabs. Put your phone in airplane mode — a call during the interview destroys the impression. Keep two things at hand: a glass of water, a piece of paper with 5 key words (never a full script — it shows when you are reading).

Body language that builds trust

Three markers recruiters read unconsciously in the first 60 seconds. Eye contact — around 60% of the time eye-to-eye, the rest on the forehead or nose area (on video, look at the camera, not the screen). Open posture — shoulders back, hands visible, never crossed on the chest. Speech rhythm — slightly slowed compared to your normal pace, especially on the first sentences (stress speeds you up; slowness signals control).

How a job interview unfolds: the minute-by-minute breakdown

Here is the near-universal structure of a 45-minute interview. Knowing this script lets you keep a mental map of time passing and pace your answers.

During the interview: the STAR method + mistakes to avoid

The STAR method for behavioral questions

“Describe a situation where you handled a conflict with a colleague.” “Tell me about a project that did not go as planned.” These questions hit in every interview. The STAR method structures your answers in 90 seconds max.

The STAR trap. 80% of candidates stay in the “Situation” too long and reach Action in 30 seconds. Invert: compress context, expand action. Action is where your competence reveals itself.

7 mistakes that disqualify in interviews

  1. Trash an old employer or colleague. Even if justified. Recruiters hear “this person will be hard to integrate.” Reframe everything neutrally.
  2. Have no questions at the end. Disqualifying signal. Prepare 8 questions, 3 of which you keep in reserve in case some are answered during the interview.
  3. Ask about remote work in the first 10 minutes. Disengagement signal. Ask later, framed as “how does the team collaborate between in-office and remote?”
  4. Lie about competences. If you get tested technically, it shows in 30 seconds. Prefer “I do not have deep experience on X but here is how I would approach it.”
  5. Speak too fast or interrupt. Visible stress. Breathe. Leave 2 seconds after each question before answering.
  6. Use “we” when talking about achievements. The interview evaluates YOU, not your team. Say “I” or “my contribution was.”
  7. Bring up salary before they do. Bad social-reading signal. Wait for them to bring it up first (see salary section below).

What to say in a job interview: the right phrasings

“Why do you want to join our company?”

The worst answer: “Because you are a leading company with a strong culture.” Generic, interchangeable, negative signal.

The good answer has three ingredients: (1) a reference to a recent event/project you read about, (2) an explicit link with your trajectory, (3) an implicit question you want to explore in the role.

Example: “Three things, specifically. First, I saw in March that you launched X — this is exactly the type of problem I like working on, at the intersection of A and B. Second, I spoke with Y from your team and they explained how you approach Z, which matches my way of working. And third, I want to understand how you structure decisions on W because that is the question I find most interesting in this industry.”

“What are your salary expectations?”

This trap question aims to anchor the negotiation. Too low, you leave money on the table. Too high, you fall outside the range.

Strategy 1: turn the question around (recommended for juniors). “I would like to understand the range you have in mind for this role, based on the experience required. I am confident that if we are aligned on the role, we will find an agreement on compensation.” 70% of recruiters will share their range.

Strategy 2: give an anchored range (recommended for 3+ years experience). “Based on the market and my current responsibilities, I am targeting X to Y. I am flexible if the overall package (variable, equity, growth path) is attractive.” Give the market range + 10-15%, never more.

Reliable range sources. Glassdoor (with experience filter), Levels.fyi (especially for tech), LinkedIn Salary, and — the best — a mentor in role who tells you the actual internal range at the company.

“Do you have any questions?” — the closing that changes everything

80% of candidates respond with 1-2 lukewarm questions (“what is the work-life balance?”, “how does training work?”). The best respond with 3 questions that show they have done their homework and already think like an employee. Here is the recommended structure.

These three questions, in this order, signal: (1) you think in terms of outcomes, (2) you understand strategy, (3) you are interested in the people, not just the title.

After the interview: the follow-up that converts

90% of candidates send a “thank you for your time” within 24 hours. Better than nothing. The best candidates send a follow-up that adds value — that is what makes the difference when the recruiter is hesitating between two similar profiles.

Structure of the winning follow-up (sent 24h after).

  1. One thank-you sentence personalized (a specific detail from the conversation).
  2. A reference to a topic discussed that struck you and that you have thought about since. Example: “You mentioned the challenge of X — I thought of an angle Y we did not have time to explore.”
  3. A value-add asset: an article you cite, a number, a similar case in another industry. Without showing off. 2-3 sentences max.
  4. A closing sentence that reaffirms your interest and opens the door to next steps.

This follow-up takes 20 minutes to write and tips 1 in 5 decisions. If you want to push further, add a LinkedIn connection 48h after the email.

Prep by sector: the specifics

Investment banking interview

The IB interview hits on three axes: technical (DCF, LBO, comps, accounting), fit (why banking, why this bank, why this team), and brainteaser (quick logic questions). Technical is 50% of the score. Prepare the 30 classic technical questions with 60-second scripts each. See our 7-day IB superday prep guide for the detail.

Consulting interview (MBB and Big 4)

The consulting interview runs 80% on the case interview — a business case study solved out loud in 30-45 minutes. Fit is 20% and lands at the start of the session. The case is prepared with frameworks (profitability, market entry, M&A, market sizing) and 30+ cases solved blind. The secret: the quality of your structuring in the first 60 seconds weighs more than the correctness of the final answer.

Tech interview (PM, engineer, designer)

Tech interview = specific competences + system design + behavioral. For PMs: product sense (“design X”), execution (“how to launch X”), analytical (“how many users…”). For engineers: leetcode + system design + behavioral on Amazon Leadership Principles or equivalent. The prep: Pramp, Interviewing.io, and a mock-interview with a PM/engineer in role.

Consulting or finance: a word on the choice

If you are torn between the two, read our investment banking vs consulting comparison first — real numbers on the axes that matter (hours, comp, exits, personal fit). Picking the right sector upfront saves you from botching interviews in the wrong one.

FAQ — common questions

How long does it take to prepare an interview properly?

For a junior or internship role: 10 to 15 hours spread across 2-3 weeks. For a senior or very technical role (banking, consulting, FAANG): 30 to 60 hours over 4-6 weeks. The mistake is doing everything the night before — saturated working memory on the day makes you stumble even on prepared answers.

Should you know the interviewer's name beforehand?

Yes, systematically. If you were not given it, ask HR by email — it is not pushy. Read their LinkedIn: their path, recent posts, points in common with you (school, former employer, interest area). A natural mention at the start of the interview (“I saw you did your MBA at X — a former colleague of mine studied there”) immediately creates a connection point.

How to handle silence in an interview?

Silence after a hard question is OK — better than a rushed answer. You can say “good question, let me think for 10 seconds” and actually take those 10 seconds. Recruiters value structured reflection more than speed. Silence is disqualifying only when it stretches past 30 seconds or comes with panic signals.

What do you do if you completely botch an answer?

Acknowledge it. “I'm not happy with my answer, let me reframe.” This sentence shows maturity and self-awareness — qualities highly sought after. Restart with a structured response. Many candidates land offers despite 1-2 botched answers because of their ability to recover.

How many follow-ups if there is no response?

One follow-up after 7 days if you were told “answer within 5 days.” A second after 14 days if still nothing. Beyond that, consider the offer lost but keep the contact for future opportunities. A short email: “Hi X, just wanted to check where things stand. I remain very interested in the role — let me know if you need any additional input from my side.”

Should you take notes during the interview?

Not in person — it breaks contact. On video, OK for 1-2 keywords but discreetly. If the interview is an assessment center or case study, structured notes are expected. Ask at the start: “is it OK if I take a few notes so I do not miss anything?”

What if you get an illegal question?

Illegal questions in most jurisdictions: precise age, family situation, pregnancy plans, ethnic origin, religion, political views, health status. Two options: (1) answer briefly and move on (“I'm 28” suffices), (2) reframe politely (“I'm not sure how that affects my ability to do the job”). The second is more assertive but can tense the room. Read context.

Can AI prepare my interview?

For technical questions (DCF, leetcode, case frameworks), yes — ChatGPT or Claude are excellent drill partners. For behavioral questions and coaching your personal pitch, no — AI does not capture tone, rhythm, eye contact, and cannot test your ability to improvise under pressure. The human mock-interview remains essential.

Recap and next step

Preparing a job interview properly is three weeks of structured work: deep company research, writing 12 standard answers, mock-interview with a mentor in role, and serene execution on the day. Candidates who do these four steps land offers at 2-3x the rate of those who cram the night before.

The mock-interview with a mentor is the step that creates the most value in 60 minutes — and the one most candidates skip. If you are 1-2 weeks away from an important interview, it is the highest-ROI investment in your entire process.

Book 60 minutes with a mentor in role in your target sector — banking, consulting, tech, marketing, legal. Hourly sessions, no commitment, transparent pricing per mentor. And if you want to first explore how to choose the right mentor, read our 7-question guide before booking.