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Walmart Labs Coding Interview Questions

We track 143 coding questions asked at Walmart Labs, tagged with the algorithms and concepts they test. The most common: Array, String, Hash Table, Dynamic Programming, Two Pointers.

Browse all 143 Walmart Labs questions →

Concept mix

Each question's weight is split evenly across its concepts, so the shares sum to 100%.

Array — 20.8%String — 10.0%Hash Table — 7.3%Dynamic Programming — 6.9%Two Pointers — 5.2%Math — 4.2%Sorting — 3.2%Binary Search — 3.2%Stack — 3.1%Linked List — 3.1%Other (37) — 33.1%

How many questions involve each concept

Share of all 143 tracked Walmart Labs questions that touch each concept. Questions usually involve several, so these overlap.

Where Walmart Labs differs from the average company

Concept weight at Walmart Labs relative to the average across all companies we track. Green means Walmart Labs leans on it harder than most.

Walmart Labs specialties

Concepts that show up at Walmart Labs but are rarely asked elsewhere. They are easy to get blindsided by.

Difficulty mix

Level split of the 143 tracked Walmart Labs questions.

  • Junior13% (19)
  • Mid/Senior70% (100)
  • Staff17% (24)

Every concept in Walmart Labs interviews

ConceptQuestions% of questionsShare of mix
Array7955.2%20.8%
String3826.6%10.0%
Hash Table3323.1%7.3%
Dynamic Programming2416.8%6.9%
Two Pointers2114.7%5.2%
Sorting1812.6%3.2%
Math1510.5%4.2%
Binary Search128.4%3.2%
Breadth-First Search128.4%2.5%
Greedy128.4%2.6%
Heap (Priority Queue)128.4%2.0%
Matrix128.4%2.7%
Stack128.4%3.1%
Linked List107.0%3.1%
Depth-First Search96.3%1.5%
Backtracking85.6%2.6%
Divide and Conquer85.6%1.3%
Sliding Window85.6%1.8%
Prefix Sum74.9%1.6%
Simulation74.9%1.4%
Bit Manipulation64.2%1.5%
Counting64.2%1.0%
Tree64.2%1.1%
Binary Tree53.5%1.0%
Design53.5%1.0%
Recursion53.5%1.3%
Monotonic Stack42.8%0.8%
Queue42.8%0.6%
Bucket Sort32.1%0.3%
Graph Theory32.1%0.5%
Trie32.1%0.5%
Doubly-Linked List21.4%0.4%
Merge Sort21.4%0.3%
Quickselect21.4%0.2%
Topological Sort21.4%0.4%
Union-Find21.4%0.4%
Binary Indexed Tree10.7%0.1%
Combinatorics10.7%0.1%
Counting Sort10.7%0.2%
Data Stream10.7%0.1%
Database10.7%0.7%
Eulerian Circuit10.7%0.1%
Iterator10.7%0.1%
Memoization10.7%0.1%
Monotonic Queue10.7%0.1%
Ordered Set10.7%0.1%
Segment Tree10.7%0.1%

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