Interview Prep — From Intro to Asking Questions

After the Resume, the Real Test

If your resume is a 60-second document, the interview is a 30-minute decision: "Do I want to work with this person?" Interviewers aren't looking for polished theatrical answers — they're looking for prepared thinking and a grounded attitude. This guide covers the core preparation that works for both new graduates and experienced hires.

Self-Introduction — Prep Two Versions

Self-introduction is almost always the first question, and most candidates either go too short ("Hi, I'm Min-su, applying for the engineer role") or too long (a five-minute autobiography). Both leave the interviewer unsure where to start the next question.

Prepare two versions:

30 seconds: name → job keyword → one strongest skill → one-line motivation
1 minute: add 1–2 concrete experiences with numbers

Example (30s): "Hi, I'm Min-su Kim, a backend engineer with five years in fintech payments. I've operated APIs handling 10,000 daily transactions, and I'm strong at designing for stability. I applied because your team's payment infrastructure expansion is the kind of problem I want to keep working on."

The interviewer uses these 30 seconds to choose the next question. Nail this and you've effectively won half the interview.

Seven Common Questions

The same questions show up in nearly every interview. Have a default answer for each:

Tell me about yourself — use the structure above
Why this company? — link a problem they're solving to one of your past experiences
Your strengths/weaknesses — strength tied to the role; weakness with one line on what you're doing about it
Most challenging project — use STAR (below) within one minute
A conflict you handled — recognize disagreement, drive toward agreement
Where do you see yourself in five years? — frame yourself as someone they'll want to keep growing
Any questions for us? — always prepare 1–2 (see below)

Practice answers out loud, not just in your head. Spoken answers come out shorter and rougher than written ones.

STAR — A Default Frame for Experience Questions

For "tell me about a time when..." questions, STAR is reliable:

Situation — context
Task — what was your role
Action — what you specifically did
Result — what happened, what you learned

One or two sentences per step, the whole story under a minute. End with numbers when possible (revenue +X%, response time −Y seconds). Numeric answers stick in interviewer memory in a way that adjective-heavy answers don't.

Questions for the Interviewer

Saying "no, I don't have any" at the end is one of the most common interview mistakes. The interviewer reads it as low engagement.

Strong questions:

What does success in this role look like at the 3- and 6-month mark?
What's the hardest technical or business problem the team is working on right now?
A year from now, what would the best version of someone in this role have accomplished?
Which company value matters most to you personally as a manager?

Avoid asking about salary, vacation, or benefits in the interview itself — those usually come up at offer stage with HR.

Day-of Checklist

Arrive 15 minutes early (not earlier — it's awkward)
Dress one notch above the company's daily code
Carry a notepad and pen for quick notes
Phone on silent (vibrate off) and in your bag
Confirm the interviewer's name before greeting
Sit slightly forward, not slumped against the chair

For Video Interviews

First-round interviews are often video now. Extra prep:

Camera position: at eye level. Use a laptop stand if needed.
Lighting: front or side, so your face is visible without shadows.
Background: plain wall is safest. Virtual backgrounds look strange in low resolution.
Connection test: check camera, mic, and internet 30 minutes before.
Eye contact: look at the camera, not the screen. The camera is the interviewer's eye while you're answering.

Final Thought

Interviews involve some luck, but preparation reduces the variance of the outcome more than anything else. Write out your self-introduction and seven default answers, practice them aloud three times, and the same person walks into the room as a different candidate. The interviewer isn't looking for the right answer — they're looking for someone who came prepared.