Coding and Debugging Assessments

Comprehensive Technical Evaluation

Assess candidates with coding and debugging challenges across 7 languages and 22 frameworks.

Coding Assessment · Backend Engineer

Problem: JavaScript

Two Sum

Given an array of integers nums and a target, return the indices of the two numbers that add up to the target.

Example

nums = [2, 7, 11, 15]

target = 9

→ [0, 1]

O(n) expected

solution.js

function twoSum(nums, target) {
    const seen = new Map();
    for (let i = 0; i < nums.length; i++) {
        const need = target - nums[i];
        if (seen.has(need))
            return [seen.get(need), i];
        seen.set(nums[i], i);
    }
}

Test results