Machine Coding Round: Time Management Tips

Machine Coding Round: Time Management Tips

90 minutes is tight. Here is how to manage time effectively in the machine coding round.

The 90-Minute Plan

Phase 1: Read and Plan (0-10 min)

1. Read the problem statement twice.
2. List the required features.
3. List the edge cases.
4. Sketch the HTML structure.
5. Plan the state variables.
6. Plan the event handlers.

Do not start coding until you have a plan. 10 minutes of planning saves 20 minutes of rework.

Phase 2: Build Core (10-60 min)

Build the minimum viable feature first. Get it working end-to-end.

For an autocomplete search bar:

1. Input field that shows suggestions.
2. Filter suggestions based on input.
3. Display the filtered list.

Do not add debounce, keyboard navigation, or highlighting yet. Get the core working first.

Phase 3: Edge Cases and Features (60-80 min)

Now add:

• Debounce.
• Keyboard navigation (up/down/enter).
• Highlight matching text.
• Empty state ("no results").
• Click outside to close.

Handle edge cases:

• Empty input.
• No results.
• Very long input.
• Special characters.

Phase 4: Test and Polish (80-90 min)

• Test with the examples from the problem.
• Test edge cases.
• Fix bugs.
• Add basic CSS (padding, borders, hover states).
• Clean up code (rename variables, remove console.log).

Common Time Management Mistakes

1. Starting to code immediately: no plan leads to rework.
2. Spending too long on one feature: build core first, move on.
3. Perfecting CSS early: get it working first, polish later.
4. Not testing: bugs cost more at the end.
5. Running out of time with no working solution: a working core is better than an unfinished perfect solution.

The Takeaway

Manage time: 10 min plan, 50 min core, 20 min edge cases, 10 min test. Build the minimum viable feature first. Do not perfect CSS early. Test at the end. A working core is better than an unfinished perfect solution.