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 KLA interviews.
Very Likely
75-100%
Likely
50-74%
Sometimes
25-49%
Rare
0-24%
Problem database last updated: June 20, 2025
K
KLA Coding Interview Questions
8 problems · 2 Easy, 3 Medium, 3 Hard · Ranked #172 of 458
Difficulty breakdown
2 Easy
25% · avg 23%
3 Medium
38% · avg 59%
3 Hard
38% · avg 18%
Top topics
math
37.5%3x
hash-table
37.5%1.7x
design
37.5%6.5x
array
25%
two-pointers
25%1.8x
linked-list
25%3.5x
Interview profile
Based on 8 reported problems, KLA interviews are significantly harder than average - 38% Hard vs 18% across all companies.
Compared to the industry average, KLA puts unusual emphasis on doubly-linked-list (25% of problems, 13.1x the industry average), design (37.5% of problems, 6.5x the industry average), linked-list (25% of problems, 3.5x the industry average). If you're short on time, these are the categories to double down on.
The most common topics are math (37.5%), hash-table (37.5%), design (37.5%), array (25%). Problems below are sorted by frequency, the ones at the top are asked most often.
All 8 problems
| Problem | Difficulty | Frequency | Topics | |
|---|---|---|---|---|
Maximum Product of First and Last Elements of a Subsequence You are given an integer array nums and an integer m. | Medium | Very Likely | arraytwo-pointers | Solve |
Reaching Points Given four integers sx, sy, tx, and ty, return true if it is possible to convert the point (sx, sy) to the point (tx, ty) through some operations, or false othe... | Hard | Very Likely | math | Solve |
LRU Cache Design a data structure that follows the constraints of a Least Recently Used (LRU) cache. | Medium | Very Likely | hash-tablelinked-listdesign | Solve |
LFU Cache Design and implement a data structure for a Least Frequently Used (LFU) cache. | Hard | Likely | hash-tablelinked-listdesign | Solve |
Two Sum Given an array of integers nums and an integer target, return the indices of the two numbers that add up to target. | Easy | Likely | arrayhash-map | Solve |
Maximum Swap You are given an integer num. You can swap two digits at most once to get the maximum valued number. | Medium | Likely | mathgreedy | Solve |
Roman to Integer Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M. | Easy | Likely | hash-tablemathstring | Solve |
Find Median from Data Stream The median is the middle value in an ordered integer list. If the size of the list is even, there is no middle value, and the median is the mean of the two midd... | Hard | Likely | two-pointersdesignsorting | Solve |
Maximum Product of First and Last Elements of a Subsequence
SolveYou are given an integer array nums and an integer m.
MediumVery Likely
arraytwo-pointers
Reaching Points
SolveGiven four integers sx, sy, tx, and ty, return true if it is possible to convert the point (sx, sy) to the point (tx, ty) through some operations, or false othe...
HardVery Likely
math
LRU Cache
SolveDesign a data structure that follows the constraints of a Least Recently Used (LRU) cache.
MediumVery Likely
hash-tablelinked-listdesign
LFU Cache
SolveDesign and implement a data structure for a Least Frequently Used (LFU) cache.
HardLikely
hash-tablelinked-listdesign
Two Sum
SolveGiven an array of integers nums and an integer target, return the indices of the two numbers that add up to target.
EasyLikely
arrayhash-map
Maximum Swap
SolveYou are given an integer num. You can swap two digits at most once to get the maximum valued number.
MediumLikely
mathgreedy
Roman to Integer
SolveRoman numerals are represented by seven different symbols: I, V, X, L, C, D and M.
EasyLikely
hash-tablemathstring
Find Median from Data Stream
SolveThe median is the middle value in an ordered integer list. If the size of the list is even, there is no middle value, and the median is the mean of the two midd...
HardLikely
two-pointersdesignsorting
Preparing for your KLA coding interview
KLA interviews focus heavily on math, hash-table, design 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. KLA 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 KLA ask in interviews?add
KLA has been reported to ask 8 distinct coding problems. The most common topics are math, hash-table, design. 2 are Easy difficulty, 3 are Medium, and 3 are Hard. Problems are sorted by frequency - the ones at the top are asked most often.
How hard are KLA coding interviews?add
Based on 8 reported problems, KLA interviews are significantly harder than average - 38% Hard vs 18% across all companies. 38% 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 KLA coding interview?add
Start with the highest-frequency problems listed on this page. Focus on the core topics: math, hash-table, design. 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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