Problem database last updated: June 20, 2025
6 problems · 0 Easy, 3 Medium, 3 Hard · Ranked #219 of 458
0 Easy
0% · avg 23%
3 Medium
50% · avg 59%
3 Hard
50% · avg 18%
Based on 6 reported problems, InMobi interviews are significantly harder than average - 50% Hard vs 18% across all companies.
Compared to the industry average, InMobi puts unusual emphasis on stack (33.3% of problems, 3.9x the industry average), binary-search (33.3% of problems, 3.8x the industry average), two-pointers (33.3% of problems, 2.5x the industry average). If you're short on time, these are the categories to double down on.
The most common topics are binary-search (33.3%), array (33.3%), two-pointers (33.3%), dynamic-programming (33.3%). Problems below are sorted by frequency, the ones at the top are asked most often.
| Problem | Difficulty | Frequency | Topics | |
|---|---|---|---|---|
Reach a Number You are standing at position 0 on an infinite number line. There is a destination at position target. | Medium | Very Likely | mathbinary-search | Solve |
Trapping Rain Water Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it can trap after raining. | Hard | Likely | arraytwo-pointersdynamic-programming | Solve |
Longest Valid Parentheses Given a string containing just the characters '(' and ')', return the length of the longest valid (well-formed) parentheses substring. | Hard | Likely | stringdynamic-programmingstack | Solve |
Redundant Connection In this problem, a tree is an undirected graph that is connected and has no cycles. | Medium | Likely | depth-first-searchbreadth-first-searchunion-find | Solve |
Partition Labels You are given a string s. We want to partition the string into as many parts as possible so that each letter appears in at most one part. For example, the strin... | Medium | Likely | hash-tabletwo-pointersstring | Solve |
Maximum Number of Robots Within Budget You have n robots. You are given two 0-indexed integer arrays, chargeTimes and runningCosts, both of length n. The ith robot costs chargeTimes[i] units to charg... | Hard | Likely | arraybinary-searchqueue | Solve |
Reach a Number
SolveYou are standing at position 0 on an infinite number line. There is a destination at position target.
Trapping Rain Water
SolveGiven n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it can trap after raining.
Longest Valid Parentheses
SolveGiven a string containing just the characters '(' and ')', return the length of the longest valid (well-formed) parentheses substring.
Redundant Connection
SolveIn this problem, a tree is an undirected graph that is connected and has no cycles.
Partition Labels
SolveYou are given a string s. We want to partition the string into as many parts as possible so that each letter appears in at most one part. For example, the strin...
Maximum Number of Robots Within Budget
SolveYou have n robots. You are given two 0-indexed integer arrays, chargeTimes and runningCosts, both of length n. The ith robot costs chargeTimes[i] units to charg...
Frequency scores are based on crowdsourced interview reports. A higher score means the problem has been reported more often in recent InMobi interviews.
Very Likely
75-100%
Likely
50-74%
Sometimes
25-49%
Rare
0-24%
InMobi interviews focus heavily on binary-search, array, two-pointers 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. InMobi 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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InMobi has been reported to ask 6 distinct coding problems. The most common topics are binary-search, array, two-pointers. 0 are Easy difficulty, 3 are Medium, and 3 are Hard. Problems are sorted by frequency - the ones at the top are asked most often.
Based on 6 reported problems, InMobi interviews are significantly harder than average - 50% Hard vs 18% across all companies. 50% 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: binary-search, array, two-pointers. 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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