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 LINE interviews.
Very Likely
75-100%
Likely
50-74%
Sometimes
25-49%
Rare
0-24%
Problem database last updated: June 20, 2025
L
LINE Coding Interview Questions
4 problems · 0 Easy, 0 Medium, 4 Hard · Ranked #292 of 458
Difficulty breakdown
0 Easy
0% · avg 23%
0 Medium
0% · avg 59%
4 Hard
100% · avg 18%
Top topics
array
100%1.7x
dynamic-programming
50%2.5x
queue
25%17.4x
sliding-window
25%5.3x
heap-priority-queue
25%4.1x
monotonic-queue
25%36.1x
Interview profile
Based on 4 reported problems, LINE interviews are significantly harder than average - 100% Hard vs 18% across all companies.
Compared to the industry average, LINE puts unusual emphasis on dynamic-programming (50% of problems, 2.5x the industry average), array (100% of problems, 1.7x the industry average). If you're short on time, these are the categories to double down on.
The most common topics are array (100%), dynamic-programming (50%), queue (25%), sliding-window (25%). Problems below are sorted by frequency, the ones at the top are asked most often.
All 4 problems
| Problem | Difficulty | Frequency | Topics | |
|---|---|---|---|---|
Sliding Window Maximum You are given an array of integers nums, there is a sliding window of size k which is moving from the very left of the array to the very right. You can only see... | Hard | Very Likely | arrayqueuesliding-window | Solve |
Sudoku Solver Write a program to solve a Sudoku puzzle by filling the empty cells. | Hard | Very Likely | arrayhash-tablebacktracking | Solve |
Frog Jump A frog is crossing a river. The river is divided into some number of units, and at each unit, there may or may not exist a stone. The frog can jump on a stone,... | Hard | Very Likely | arraydynamic-programming | Solve |
Minimum Cost to Cut a Stick Given a wooden stick of length n units. The stick is labelled from 0 to n. For example, a stick of length 6 is labelled as follows: | Hard | Very Likely | arraydynamic-programmingsorting | Solve |
Sliding Window Maximum
SolveYou are given an array of integers nums, there is a sliding window of size k which is moving from the very left of the array to the very right. You can only see...
HardVery Likely
arrayqueuesliding-window
Sudoku Solver
SolveWrite a program to solve a Sudoku puzzle by filling the empty cells.
HardVery Likely
arrayhash-tablebacktracking
Frog Jump
SolveA frog is crossing a river. The river is divided into some number of units, and at each unit, there may or may not exist a stone. The frog can jump on a stone,...
HardVery Likely
arraydynamic-programming
Minimum Cost to Cut a Stick
SolveGiven a wooden stick of length n units. The stick is labelled from 0 to n. For example, a stick of length 6 is labelled as follows:
HardVery Likely
arraydynamic-programmingsorting
Preparing for your LINE coding interview
LINE interviews focus heavily on array, dynamic-programming, queue 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. LINE 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 LINE ask in interviews?add
LINE has been reported to ask 4 distinct coding problems. The most common topics are array, dynamic-programming, queue. 0 are Easy difficulty, 0 are Medium, and 4 are Hard. Problems are sorted by frequency - the ones at the top are asked most often.
How hard are LINE coding interviews?add
Based on 4 reported problems, LINE interviews are significantly harder than average - 100% Hard vs 18% across all companies. 0% 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 LINE coding interview?add
Start with the highest-frequency problems listed on this page. Focus on the core topics: array, dynamic-programming, queue. Practice solving them under time pressure and explaining your approach out loud. Mock interviews with AI can simulate the real experience.
Other companies to explore
Ready to ace your LINE interview?
Simulate a real LINE coding interview with an AI interviewer. Get a scorecard with specific feedback on your problem-solving, code quality, and communication.
Simulate a LINE interview with AIarrow_forward