How to Manage Your Time During a 90-Minute Machine Coding Round

How to Manage Your Time During a 90-Minute Machine Coding Round

Time management is the hardest part of a machine coding interview. You cannot build perfectly in the time, so how you budget matters. Here is how.

First 10 Minutes: Read and Plan

Read the problem carefully. Identify the must-have features, the nice-to-have features, and the features you will skip if time runs out. Sketch a rough component structure.

Next 15 Minutes: Setup and Skeleton

Set up the project, install dependencies, create a basic structure, and get a placeholder rendering. A working skeleton early gives you something to build on.

Next 40 Minutes: Build the Must-Haves

Build the must-have features first, focusing on a working result. Do not perfect styling or edge cases until the must-haves work end to end.

Next 15 Minutes: Polish and Edge Cases

With must-haves working, polish the UI and handle edge cases like empty states and errors. A working but slightly rough app beats a perfect half-built one.

Last 10 Minutes: Test and Fix

Test the full flow end to end. Fix the bugs you find. A working submission with one missing feature beats a broken submission with all features attempted.

Prioritize Ruthlessly

The biggest mistake is trying to build everything. Interviewers would rather see a working subset than a broken superset. Build the core, then add nice-to-haves if time allows.

The Takeaway

Budget your time: read and plan, set up a skeleton, build the must-haves, polish edge cases, then test and fix. Prioritize ruthlessly, because a working subset beats a broken superset.