How to Talk Through Coding Interviews

The most common mistake candidates make during a technical interview is reading the prompt, saying "Okay, I think I know how to do this," and then silently typing for 20 minutes.

Even if you produce perfectly working code, you have failed the interview. Interviewers are not just evaluating your code; they are evaluating what it would be like to work with you on a team. If you can't communicate your technical decisions, you are a liability.

To pass modern technical screens, you need to adopt a strict communication protocol:

1. Clarify: Repeat the question back in your own words. Ask about constraints (e.g., "Can the array contain negative numbers?").
2. Brute Force: Verbally describe the naive O(N^2) solution. This proves you have a baseline understanding and buys you time to think of an optimal approach.
3. Optimize: Discuss how you might use a Hash Map or Two Pointers to bring the time complexity down to O(N). Ask the interviewer: "Does this approach sound good to you?" before you start typing.
4. Narrate as You Type: "Now I'm creating the hash map to store the frequencies..." Keep a steady stream of consciousness.

You cannot practice this by staring at LeetCode. You have to physically open your mouth and speak.

CodeSparring's AI simulator is specifically built to grade your communication. It uses voice-recognition to ensure you are narrating your steps and penalizes you if you spend too much time coding in silence.