Problem database last updated: June 20, 2025
9 problems · 2 Easy, 6 Medium, 1 Hard · Ranked #164 of 458
2 Easy
22% · avg 23%
6 Medium
67% · avg 59%
1 Hard
11% · avg 18%
Based on 9 reported problems, NetApp interviews are in line with industry averages - 11% Hard vs 18% overall. The majority (67%) 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, NetApp puts unusual emphasis on linked-list (33.3% of problems, 4.6x the industry average), math (22.2% of problems, 1.8x the industry average), hash-table (33.3% 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 hash-table (33.3%), linked-list (33.3%), array (33.3%), string (33.3%). Problems below are sorted by frequency, the ones at the top are asked most often.
| Problem | Difficulty | Frequency | Topics | |
|---|---|---|---|---|
LRU Cache Design a data structure that follows the constraints of a Least Recently Used (LRU) cache. | Medium | Very Likely | hash-tablelinked-listdesign | Solve |
Move Zeroes Given an integer array nums, move all 0's to the end of it while maintaining the relative order of the non-zero elements. | Easy | Very Likely | arraytwo-pointers | Solve |
Find First and Last Position of Element in Sorted Array Given an array of integers nums sorted in non-decreasing order, find the starting and ending position of a given target value. | Medium | Very Likely | arraybinary-search | Solve |
Basic Calculator II Given a string s which represents an expression, evaluate this expression and return its value. | Medium | Very Likely | mathstringstack | Solve |
Merge k Sorted Lists You are given an array of k linked-lists lists, each linked-list is sorted in ascending order. | Hard | Very Likely | linked-listdivide-and-conquerheap-priority-queue | Solve |
Path Sum III Given the root of a binary tree and an integer targetSum, return the number of paths where the sum of the values along the path equals targetSum. | Medium | Very Likely | treedepth-first-searchbinary-tree | Solve |
Reconstruct Original Digits from English Given a string s containing an out-of-order English representation of digits 0-9, return the digits in ascending order. | Medium | Very Likely | hash-tablemathstring | Solve |
Reverse Linked List Given the head of a singly linked list, reverse the list, and return the reversed list. | Easy | Very Likely | linked-listrecursion | Solve |
Group Anagrams Given an array of strings strs, group the anagrams together. You can return the answer in any order. | Medium | Very Likely | arrayhash-tablestring | Solve |
LRU Cache
SolveDesign a data structure that follows the constraints of a Least Recently Used (LRU) cache.
Move Zeroes
SolveGiven an integer array nums, move all 0's to the end of it while maintaining the relative order of the non-zero elements.
Find First and Last Position of Element in Sorted Array
SolveGiven an array of integers nums sorted in non-decreasing order, find the starting and ending position of a given target value.
Basic Calculator II
SolveGiven a string s which represents an expression, evaluate this expression and return its value.
Merge k Sorted Lists
SolveYou are given an array of k linked-lists lists, each linked-list is sorted in ascending order.
Path Sum III
SolveGiven the root of a binary tree and an integer targetSum, return the number of paths where the sum of the values along the path equals targetSum.
Reconstruct Original Digits from English
SolveGiven a string s containing an out-of-order English representation of digits 0-9, return the digits in ascending order.
Reverse Linked List
SolveGiven the head of a singly linked list, reverse the list, and return the reversed list.
Group Anagrams
SolveGiven an array of strings strs, group the anagrams together. You can return the answer in any order.
Frequency scores are based on crowdsourced interview reports. A higher score means the problem has been reported more often in recent NetApp interviews.
Very Likely
75-100%
Likely
50-74%
Sometimes
25-49%
Rare
0-24%
NetApp interviews focus heavily on hash-table, linked-list, array 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. NetApp 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.
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NetApp has been reported to ask 9 distinct coding problems. The most common topics are hash-table, linked-list, array. 2 are Easy difficulty, 6 are Medium, and 1 are Hard. Problems are sorted by frequency - the ones at the top are asked most often.
Based on 9 reported problems, NetApp interviews are in line with industry averages - 11% Hard vs 18% overall. 67% of questions are Medium difficulty. Focus on the high-frequency Medium problems first, then work through the Hard ones.
Start with the highest-frequency problems listed on this page. Focus on the core topics: hash-table, linked-list, array. 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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