Section 1Understand Problem
Section 01
Understand the problem
Restate the problem precisely. Interviewers reward candidates who pause, define the contract, and name the guarantees before coding.
Problem statement
Given two non-negative integers `num1` and `num2` represented as strings, return the product of `num1` and `num2`, also represented as a string. **Note:** You must not use any built-in BigInteger library or convert the inputs to integer directly.
Example
num1 = "2", num2 = "3" → "6"
Constraints
1 ≤ num1.length, num2.length ≤ 200 · num1 and num2 consist of digits only · Both num1 and num2 do not contain any leading zero, except the number 0 itself
Audio recording unsupported on this browser.
WPM—Fillers0Pace—Thinking0%
Explain the problem in your own words
0 words0 chars
AI Review
Write your thinking above first.
Once you've drafted a response, click Submit for AI review and a senior engineer will critique your reasoning.
Ready to submit Section 1?
The reviewer will check whether you stated inputs, output, guarantees, and any assumption you flagged.
Write at least a couple of sentences explaining the problem before submitting.