How often are these problems asked?
Frequency scores are based on crowdsourced interview reports. A higher score means the problem has been reported more often in recent Zoox interviews.
Very Likely
75-100%
Likely
50-74%
Sometimes
25-49%
Rare
0-24%
Problem database last updated: June 20, 2025
Z
Zoox Coding Interview Questions
9 problems · 2 Easy, 7 Medium, 0 Hard · Ranked #155 of 458
Difficulty breakdown
2 Easy
22% · avg 23%
7 Medium
78% · avg 59%
0 Hard
0% · avg 18%
Top topics
array
55.6%
string
33.3%
dynamic-programming
22.2%
math
22.2%1.8x
two-pointers
22.2%1.6x
sorting
22.2%1.5x
Interview profile
Based on 9 reported problems, Zoox interviews are easier than average - only 0% Hard compared to 18% across all companies. The majority (78%) of questions are Medium difficulty, which is typical for companies that want to see solid fundamentals without excessive trick questions.
Compared to the industry average, Zoox puts unusual emphasis on math (22.2% of problems, 1.8x the industry average), two-pointers (22.2% of problems, 1.6x the industry average), sorting (22.2% of problems, 1.5x the industry average). If you're short on time, these are the categories to double down on.
The most common topics are array (55.6%), string (33.3%), dynamic-programming (22.2%), math (22.2%). Problems below are sorted by frequency, the ones at the top are asked most often.
All 9 problems
| Problem | Difficulty | Frequency | Topics | |
|---|---|---|---|---|
Best Time to Buy and Sell Stock You are given an array prices where prices[i] is the price of a given stock on the ith day. | Easy | Very Likely | arraydynamic-programming | Solve |
Basic Calculator II Given a string s which represents an expression, evaluate this expression and return its value. | Medium | Likely | mathstringstack | Solve |
Minimum Number of Frogs Croaking You are given the string croakOfFrogs, which represents a combination of the string "croak" from different frogs, that is, multiple frogs can croak at the same... | Medium | Likely | stringcounting | Solve |
4Sum Given an array nums of n integers, return an array of all the unique quadruplets [nums[a], nums[b], nums[c], nums[d]] such that: | Medium | Likely | arraytwo-pointerssorting | Solve |
String Compression Given an array of characters chars, compress it using the following algorithm: | Medium | Likely | two-pointersstring | Solve |
Rotting Oranges You are given an m x n grid where each cell can have one of three values: | Medium | Likely | arraybreadth-first-searchmatrix | Solve |
Design Circular Queue Design your implementation of the circular queue. The circular queue is a linear data structure in which the operations are performed based on FIFO (First In Fi... | Medium | Likely | arraylinked-listdesign | Solve |
H-Index Given an array of integers citations where citations[i] is the number of citations a researcher received for their ith paper, return the researcher's h-index. | Medium | Likely | arraysortingcounting-sort | Solve |
Fibonacci Number The Fibonacci numbers, commonly denoted F(n) form a sequence, called the Fibonacci sequence, such that each number is the sum of the two preceding ones, startin... | Easy | Likely | mathdynamic-programmingrecursion | Solve |
Best Time to Buy and Sell Stock
SolveYou are given an array prices where prices[i] is the price of a given stock on the ith day.
EasyVery Likely
arraydynamic-programming
Basic Calculator II
SolveGiven a string s which represents an expression, evaluate this expression and return its value.
MediumLikely
mathstringstack
Minimum Number of Frogs Croaking
SolveYou are given the string croakOfFrogs, which represents a combination of the string "croak" from different frogs, that is, multiple frogs can croak at the same...
MediumLikely
stringcounting
4Sum
SolveGiven an array nums of n integers, return an array of all the unique quadruplets [nums[a], nums[b], nums[c], nums[d]] such that:
MediumLikely
arraytwo-pointerssorting
String Compression
SolveGiven an array of characters chars, compress it using the following algorithm:
MediumLikely
two-pointersstring
Rotting Oranges
SolveYou are given an m x n grid where each cell can have one of three values:
MediumLikely
arraybreadth-first-searchmatrix
Design Circular Queue
SolveDesign your implementation of the circular queue. The circular queue is a linear data structure in which the operations are performed based on FIFO (First In Fi...
MediumLikely
arraylinked-listdesign
H-Index
SolveGiven an array of integers citations where citations[i] is the number of citations a researcher received for their ith paper, return the researcher's h-index.
MediumLikely
arraysortingcounting-sort
Fibonacci Number
SolveThe Fibonacci numbers, commonly denoted F(n) form a sequence, called the Fibonacci sequence, such that each number is the sum of the two preceding ones, startin...
EasyLikely
mathdynamic-programmingrecursion
Preparing for your Zoox coding interview
Zoox interviews focus heavily on array, string, dynamic-programming problems. If you're short on time, these are the categories to prioritize. The problems on this page are sorted by frequency, so start from the top and work your way down.
Beyond solving problems, practice explaining your approach. Zoox interviewers care about your thought process - how you break down a problem, consider edge cases, and evaluate tradeoffs between solutions. A clean O(n) solution you can explain clearly beats an O(log n) solution you can't articulate.
Looking for more companies? Browse all 458 companies in our directory, or sharpen your fundamentals with our free data structure visualizers and AI-powered DSA tutor.
Frequently Asked Questions
What coding problems does Zoox ask in interviews?add
Zoox has been reported to ask 9 distinct coding problems. The most common topics are array, string, dynamic-programming. 2 are Easy difficulty, 7 are Medium, and 0 are Hard. Problems are sorted by frequency - the ones at the top are asked most often.
How hard are Zoox coding interviews?add
Based on 9 reported problems, Zoox interviews are easier than average - only 0% Hard compared to 18% across all companies. 78% of questions are Medium difficulty. Focus on the high-frequency Medium problems first, then work through the Hard ones.
How should I prepare for a Zoox coding interview?add
Start with the highest-frequency problems listed on this page. Focus on the core topics: array, string, dynamic-programming. Practice solving them under time pressure and explaining your approach out loud. Mock interviews with AI can simulate the real experience.
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