Junior Web Developer Interview Questions
The questions junior web developer candidates actually get asked, what each one is really testing, and how to structure an answer that proves shipped, working code — not just coursework instead of just describing it.
1. How do you make a page work well on both a phone and a large monitor?
What they're really testing: Expect responsive layout, flexible units, media queries, testing in browsers and checking performance.
How to answer: Describe your approach and tools, such as mobile first CSS, flexible grids, media queries, responsive images, and testing in browser dev tools and real devices.
2. A form on your site is not submitting for some users. How do you investigate?
What they're really testing: Good answers reproduce, check console and network errors, test validation and browsers, and fix with a test.
How to answer: Walk through your debugging steps, such as reproducing the issue, checking the browser console and network tab, testing different browsers and devices, and validating form handling.
3. You are asked to store user passwords in your database. How do you do it?
What they're really testing: Look for hashing with a proven algorithm, salting, never storing plain text and using HTTPS.
How to answer: Name the method, such as salted hashing with bcrypt or Argon2, and explain why storing plain text passwords is unacceptable for security and user trust.
4. Your deadline is tomorrow and you find a bug in code you wrote last week. What do you do?
What they're really testing: Strong answers tell the team, assess impact, fix or flag it, and add a test.
How to answer: Show honesty and a clear plan by telling your lead about the bug, explaining the impact, and proposing a quick fix or workaround with testing.
5. What would you do in your first 30 days in this junior web developer role?
What they're really testing: Less about the specific plan, more about whether you understand what the role actually needs on day one versus a generic "I'd get to know the team" answer.
How to answer: Ground it in the must-haves for the role — mention how you'd get oriented on html/css/javascript and react or similar framework specifically, not just "learn the systems." Specificity signals you've actually thought about the job, not just the interview.
6. Why are you leaving your current role / why this junior web developer position specifically?
What they're really testing: They're screening for red flags (badmouthing a past employer, vague motivation) and for genuine fit with this specific opening, not just any job in the field.
How to answer: Keep it forward-looking and specific to what this role offers that your current situation doesn't — growth, scope, team, mission. Never criticize a past employer, even if the real reason is a bad manager; frame it around what you're moving toward.
What interviewers quietly mark down
Pasting code you cannot explain, or ignoring security basics such as validating input and protecting passwords.
Frequently asked questions
How many interview rounds should I expect for a junior web developer role?
Most junior web developer hiring processes run two to three rounds: an initial screen, a role-specific or panel interview, and sometimes a final conversation with the hiring manager. Senior or specialized versions of this role may add a skills assessment or case study.
Should I prepare questions to ask the interviewer?
Yes — always have two or three ready, specific to the team or the role rather than generic ones you could ask anywhere. Asking nothing reads as low interest; asking only about pay or perks reads as the wrong priorities this early.
What do interviewers quietly mark down in a junior web developer interview?
Pasting code you cannot explain, or ignoring security basics such as validating input and protecting passwords.