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Walmart interview notes, page 3 of 14

Large Enterprises

Most of these Walmart write-ups come from Software Engineers (91), then Product Managers (21) and Data Scientists (13). The most reported rounds are the technical phone screen (47), the hiring manager screen (23), the product sense round (16) and the system design round (13).

139 interview notes · updated Oct 2026

Walmart·Software Engineer·Online Assessment (OA)

Apr 2026
Took a timed online coding assessment for a company I really need to land, and the results were rough. The environment is barebones with no autocomplete, which after nearly two decades of working in real IDEs feels almost deliberately cruel. Four days out from the actual test and I'm not feeling great about it.
  • Solve the MissingInteger problem: given an array of integers, find the smallest positive integer that does not appear in the array.

“Passed all the examples, which honestly lulled me into thinking I was fine.”

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Walmart·Product Manager·Onsite - Product Sense / Strategy

Apr 2026
PM interview at Walmart Labs with a public health resource allocation scenario. Pretty short on details from what I remember but the question itself was meaty enough to chew on for a while.
  • You're an analyst at a government health department. How would you distribute 5,000 vaccines across a population of 100,000 people?

“I jumped straight into segmenting by risk groups, which felt right, but I spent too long on the framework and not enough time actually defending my prioritization logic.”

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Walmart·Software Engineer·Technical Phone Screen

Apr 2026
Walmart Labs SWE interview, got a simulation-style array problem that looks deceptively simple but needs a real approach to avoid TLE on large inputs. No frills, just the one problem and then done.
  • You have an array of plants with pesticide levels. Each day, any plant whose pesticide level is strictly greater than the plant directly to its left gets removed simultaneously. How many days does this process take before no more plants die?

“My first instinct was to just simulate it day by day with a loop, which works fine for small inputs but blows up at n=1e5.”

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Walmart·Data Scientist·Technical Phone Screen

Apr 2026
Interviewed for a Data Scientist role and got hit with a classic array problem. Nothing fancy, but it still made me second-guess my approach mid-interview.
  • Given an integer array and a target value, find the indices of the two numbers that add up to the target.

“I knew this problem but still fumbled the explanation a bit.”

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Walmart·Software Engineer·Technical Phone Screen

Apr 2026
Coding screen for a software engineer role, one question about building an inverted index from a sentence map. Pretty straightforward on the surface but they wanted complexity analysis too, which I wasn't fully prepared to articulate cleanly.
  • Given a mapping from sentence index to sentence text, build an inverted index: a mapping from each word to the sorted list of sentence indices where that word appears. Matching should be case-insensitive, treat whitespace-separated tokens as words, and strip punctuation. Also discuss the time complexity.

“I got the basic logic down pretty fast.”

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Walmart·Product Manager·Onsite - Product Sense / Strategy

Apr 2026
PM interview at Walmart Labs with a product strategy question about resource allocation. Pretty short session from what I can tell, just the one case-style question but it packed a lot into it.
  • Walmart's dish soap is its best-selling product. Given that the company is also considering entering the laptop market, where would you put investment: scaling up dish soap production or building out a new laptop line?

“This one tripped me up more than I expected.”

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Walmart·Backend Engineer·Technical Phone Screen

Apr 2026
Backend engineer screen with a string manipulation problem. Pretty focused session, just the one coding question and some back-and-forth on the space complexity constraint.
  • Given two strings that may contain a special delete character, determine whether the two strings resolve to the same final string after applying all deletions. You must do this in O(1) auxiliary space.

“The naive approach is obvious: simulate a stack for each string and compare.”

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Walmart·Software Engineer·Technical Phone Screen

Apr 2026
Walmart Labs SWE interview, technical phone screen with a classic array merging problem. Pretty standard stuff but the in-place constraint is where they actually want to see if you know what you're doing.
  • You're given two sorted arrays, nums1 and nums2. nums1 has extra space at the end to fit all elements of nums2. Merge nums2 into nums1 in-place so the result is fully sorted. No extra array allowed.

“The naive approach is to just copy everything into a temp array and sort it, but they'll push back on that immediately because of the in-place constraint.”

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Walmart·Software Engineer·Technical Phone Screen

Apr 2026
Walmart Labs SWE interview with a greedy array problem. Pretty algorithmic, nothing too wild, but the follow-up about an O(n) optimization is where things got interesting.
  • Given an array of integers and a number m, remove exactly m elements such that the number of distinct values remaining is as small as possible. Return that minimum distinct count.

“I got the frequency map idea pretty fast.”

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Walmart·Product Manager·Onsite - Product Sense / Strategy

Apr 2026
Walmart Labs product interview, one question about designing an app for local congresspeople. Short and a bit open-ended, the kind of prompt that sounds simple but really isn't once you start thinking about who the users actually are.
  • Design an app for your local congresspeople.

“I fumbled the user definition for longer than I should have.”

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