Live Coding Under Pressure: 7 Habits of Strong Candidates

Most candidates fail live coding not because they can't code, but because they go silent, skip edge cases, and panic when the first attempt isn't perfect.

1) Restate the problem (out loud)

You buy time and you reduce misunderstandings:

• Inputs/outputs
• Constraints
• Examples

2) Ask about edge cases early

• Empty input
• Duplicates
• Very large values
• Unicode vs ASCII, timezones, etc. (when relevant)

3) Pick an approach and state complexity

Say:

• “This is O(n log n) because of sorting”
• “This is O(n) time, O(1) space”

4) Write readable code first, optimize second

Interviewers judge maintainability too:

• good names
• small helpers
• avoid clever one-liners

5) Test with 2–3 cases before you run it

Do a mini dry-run. Catch mistakes early.

6) When stuck: narrow the problem

• print variables
• reduce input size
• isolate the failing branch

7) Finish with a quick recap

• what you built
• complexity
• potential improvements

A simple template you can reuse

1) Clarify + examples
2) Outline approach
3) Complexity
4) Implement
5) Dry-run tests
6) Edge cases
7) Improvements