You get the calendar invite, and instead of a Zoom link there's a second link to something called a pad. No repo, no setup instructions, just a blank shared editor that opens in your browser. If you've only ever practised in your own editor with your own extensions, that blank pad is a genuinely different experience — and most of the surprise is avoidable. This guide covers what a shared-editor coding interview is, how the environment differs from your local setup, and how to prepare so the tooling stops being a variable.
What a shared-editor coding interview actually is
A live coding interview in a shared editor means you and the interviewer are looking at the same document at the same time. You open a link, pick a language, and start writing. They see every character as you type it, including the line you write and immediately delete. Most sessions run alongside a video or phone call, and most last between 30 and 60 minutes with introductions and questions at either end, which leaves rather less coding time than the calendar block suggests.
The point of the format is not to see whether you can produce perfect code under a timer. It's to watch you think: how you clarify an ambiguous problem, what you reach for first, whether you notice your own bugs, and how you respond when something doesn't work. That's a different target from a take-home, and it should change how you prepare.
The common platforms, in general terms
Several products occupy this space and you may meet any of them:
- CoderPad — probably the best known shared-pad tool, widely used for live technical screens and onsite coding rounds.
- CodeSignal — used both for live interviews and for standalone timed assessments you take on your own.
- HackerRank CodePair — the live, interviewer-present counterpart to HackerRank's assessment products.
- Karat — a service where a trained external interviewer runs a structured technical screen on the company's behalf.
They differ in detail, but the candidate-side shape is the same: a browser editor, a language selector, usually a run button, and someone watching. Prepare for the shape and you're prepared for all of them. Do not assume a specific feature exists because a colleague had it — configuration varies by employer, and it varies between rounds at the same employer.
How the pad differs from your local IDE
This is where most candidates lose time they didn't budget for.
| What you're used to | What the pad may give you |
|---|---|
| Aggressive autocomplete and AI completion | Basic or unfamiliar suggestions, sometimes none |
| Step debugger with breakpoints | Usually print statements only |
| Project-wide search and jump-to-definition | A single file |
| Your keybindings, snippets and extensions | Defaults you didn't choose |
| Any library you care to install | Whatever the environment ships with, if anything |
| Nobody watching you type | Real-time keystrokes visible to the interviewer |
The last row is the one people underestimate. Knowing that someone is reading your half-finished line as you write it changes how you type. The fix isn't to type more carefully — it's to get used to it, so that by interview day it's simply how coding feels.
Setting up before the call
Treat the environment as something you test, not something you discover.
- Open the pad link early. If it's live before the session, load it ten minutes ahead and confirm your browser, network and audio all behave. If it isn't, at least confirm which browser you'll use.
- Decide your language in advance. Pick the one you're fastest in, not the one you think sounds most impressive. Confirm it's on the list.
- Give the editor real screen space. Full-screen the browser and shrink the video tile. Scrolling to find your own function wastes minutes.
- Bump the font up a size. Fewer typos, less squinting, no cost.
- Clear the desk and the desktop. Notifications, chat apps and background tabs are all distractions you don't need mid-problem.
- Have paper. A quick sketch of an example input beats scrolling back and forth in a single-file editor.
Practising in the right conditions
If your practice happens in a fully-loaded IDE and your interview happens in a plain browser editor, you've practised the wrong task. A few sessions in a bare editor — no plugins, no completion, one file, a visible timer — closes most of that gap. Write out the boilerplate by hand: the function signature, the main block, the print statements. In a pad you type all of that yourself, and the muscle memory is worth having.
Record yourself solving one problem out loud and watch it back. It is uncomfortable and it is the single fastest way to find your own filler habits, the moments you go silent, and the point where you started coding before you had a plan. For the underlying problem-solving reps, our FAANG interview prep guide covers the pattern work that a pad session will draw on.
How to talk while you type
Narration is a skill, and the failure mode runs both ways: constant chatter that never lands on a plan, or long silence that leaves the interviewer guessing. Aim for structured bursts.
- Clarify first. Restate the problem in your own words. Ask about input size, types, duplicates, empty inputs, and whether the input is sorted. Two minutes here saves ten later.
- State the plan before you type it. Name the approach, the data structure, and the expected time and space complexity. Get a nod before you commit.
- Then implement in quiet stretches. Short silences while you write a block are fine and normal.
- Resurface at the seams. When you finish a block, change approach, or spot a bug, say so out loud.
The interviewer is writing notes about your reasoning, not just your final code. Reasoning they didn't hear can't be written down.
Testing your code in a pad
Write the test before you need it. Add a small main block with two or three concrete inputs, including at least one edge case — an empty input, a single element, or a duplicate. Run it once early with a stub, so you know the run button works and you've seen the output format. Then run after each meaningful chunk rather than saving one enormous run for the last three minutes.
If the environment doesn't execute code, do it manually: pick a tiny input and walk your function line by line, saying what each variable holds. It's slower, but it catches the same off-by-one errors and it demonstrates exactly the care interviewers are looking for.
When you get stuck
Everyone gets stuck; the difference is what happens next. Say it plainly and say where: "I'm stuck on how to keep the window valid when the character leaves — here's what I've ruled out." That gives the interviewer a place to hint, and most of them want to. Then get the brute-force version on the screen. Working slow code plus a clearly named optimisation is nearly always scored above a blank editor and a long silence. If you've genuinely run out of ideas, say what you'd go and look up — that's an honest answer, and honest answers land better than guessing.
Pre-interview checklist
- Read the invitation for the platform name, duration, allowed languages, and any stated rules on external tools or resources.
- Ask your recruiter anything the invitation doesn't answer — including what you're permitted to have open.
- Test browser, camera, microphone and network on the machine you'll actually use.
- Do two practice problems in a bare editor within the last 48 hours.
- Pick your language and have your standard boilerplate memorised.
- Close everything you don't need; silence notifications.
- Paper, pen, water, and a clock you can see without moving your head.
- Prepare two questions to ask at the end.
A note on tools and rules
Employers differ on what assistive tooling is acceptable during a live technical interview, and some state their position explicitly in the invitation. Read it, follow it, and ask if it's ambiguous. Where our own product fits is before the call: using an AI assistant to rehearse out-loud explanations, drill patterns, and practise narrating a solution under time pressure builds the exact habits a pad session tests. That preparation is yours to keep whatever the rules of the room turn out to be.
Practise the out-loud part, not just the code
Rehearse explaining your approach under time pressure with the free-forever plan — no trial timer, no credit card. Then follow whatever rules your employer sets for the live session.
Start Free →FAQ
What is a CoderPad interview?
A CoderPad interview is a live coding interview held in a shared online editor. You and the interviewer open the same link and both see the same document, so your typing appears on their screen as you type it. Most pads let you pick a language, write code, and run it against input you provide. The session usually runs alongside a video or phone call, and lasts somewhere between 30 and 60 minutes. Exactly which features are turned on varies by employer, so check your invitation or ask your recruiter what the session will include.
How is a shared-editor pad different from my local IDE?
The pad is a browser editor, so the tooling you lean on locally may be missing or reduced. Expect weaker or unfamiliar autocomplete, no project-wide search, no plugins or custom keybindings, limited or no step debugger, and a smaller visible window of code. Some pads offer a package or library environment and some do not. The other difference is social: the interviewer watches your keystrokes in real time, including your typos and deletions. Practising in a plain editor for a few sessions removes most of the surprise.
Should I talk while I code in a live coding interview?
Yes, but in structured bursts rather than a constant monologue. Say your plan out loud before you type it, then go quiet for short stretches of implementation, then narrate again when you finish a block or change direction. Announce the approach, the data structure you chose and why, and the complexity you expect. If you go silent for several minutes, the interviewer cannot tell whether you are thinking productively or stuck, and silence is usually scored worse than a rough idea spoken clearly.
How do I test my code in a coding pad?
Write the test before you need it. Add a small main block or a few print statements with two or three concrete inputs, including one edge case such as an empty input or a single element. Run early with a stub so you know the run button works and you see the output format. Then run again after each meaningful chunk rather than saving one giant run for the end. If the environment does not run code, walk through your function line by line with a small input out loud instead.
What should I do if I get stuck during a CoderPad interview?
Say that you are stuck, and say precisely where. Restate the sub-problem you cannot solve, describe what you have already ruled out, and offer the brute-force version so you have working code on the screen. Interviewers are allowed to hint and most want to, but they can only help if they know which step is blocking you. Writing a slower correct solution and naming the optimisation you would make next is almost always scored better than an empty editor and five minutes of silence.