Time Management in Coding Interviews — The 45-Minute Breakdown

The 45-Minute Blueprint

Most coding rounds are 45 minutes for one or two problems.

Single Problem (Hard) — 45 min

0:00 — 0:05  Clarify (5 min)
  Ask: input range, duplicates, sorted?, return type
  Never skip this — wrong assumptions kill solutions

0:05 — 0:12  Brute force (7 min)
  State it, estimate complexity
  "Naive: O(n²) — let me see if we can do better"

0:12 — 0:22  Optimal approach (10 min)
  Work 1-2 small examples by hand
  Identify the insight, state it clearly

0:22 — 0:38  Code (16 min)
  Write clean, readable code
  Use helper functions for complex sections

0:38 — 0:45  Test + edge cases (7 min)
  Trace through example input
  Test: empty, single, all same, min/max values

Two Problems (Med + Med) — 45 min

Problem 1: 20 min
  0:00 — 0:03  Clarify
  0:03 — 0:08  Approach
  0:08 — 0:18  Code
  0:18 — 0:20  Quick test

Problem 2: 22 min
  0:20 — 0:23  Clarify
  0:23 — 0:28  Approach
  0:28 — 0:40  Code
  0:40 — 0:42  Quick test

Buffer: 3 min for final review / follow-up

Common Time Traps

Trap 1: Over-clarifying Spending 10+ min on questions. Fix: ask maximum 3 targeted questions.

Trap 2: Perfecting the brute force Writing full working code for O(n²) before even thinking about optimal. Fix: state brute force in words, move to optimal.

Trap 3: Getting stuck on a bug Spending 10+ min on one bug. Fix: leave a comment # TODO: fix off-by-one here and move on — show the overall logic.

Trap 4: Narrating and losing focus Talking so much you forget what you were coding. Fix: short sentences while coding: "building prefix... checking condition... returning result."

Trap 5: Forgetting to test Submitting without tracing through. Fix: always save 5 min for testing. It's part of your score.

The 5-Minute Warning Protocol

When you have 5 minutes left and aren't done:

Stop coding new logic
Add comments for incomplete sections
Trace through what you have
State: "This handles the main case; I'd add X for the edge case given more time"

An incomplete solution with clear intent scores better than a broken one.

Recovery from Getting Stuck

> 5 min stuck: Narrate your thinking
  "I'm trying to figure out how to track the window..."

> 10 min stuck: Try smaller inputs
  "Let me try with n=3 and see the pattern..."

> 15 min stuck: State brute force and ask for direction
  "I have an O(n²) solution. Would it help to think about X?"

> 20 min stuck: Code the brute force
  Full points for brute force > partial points for nothing