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Coding & Algorithms questions require understanding of core concepts and practice. PracHub provides solutions with explanations to help you master coding & algorithms interviews.

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This is a hard difficulty Coding & Algorithms question, commonly asked during Technical Screen rounds at DoorDash.

What role is this question designed for?

This question is commonly asked for Analytics Engineer candidates at DoorDash during technical interviews.

Find Maximum Window Sum

Last updated: Mar 29, 2026

Quick Overview

This question evaluates array manipulation, algorithmic efficiency, and familiarity with the sliding-window technique for computing metrics over fixed-length contiguous subarrays.

hard
DoorDash
Coding & Algorithms
Analytics Engineer

DoorDash

Oct 12, 2025, 12:00 AM

Analytics Engineer

Technical Screen

Coding & Algorithms

Given an integer array nums and an integer k, write code to find the maximum sum of any contiguous subarray of length exactly k. Assume 1 <= k <= len(nums), values may be negative, and the expected solution should run in O(n) time using a sliding-window approach.

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