jio coding interview
questions, leaked.
7 problems reported across recent jio interviews. Top patterns: array, depth first search, breadth first search. The list below is what most reported candidates actually saw, plus the honest play if you can't grind all of it.
Jio's assessment leans hard on arrays and graph traversal. You're looking at 5 array problems across 7 total, split 1 easy, 2 medium, 4 hard. Two Sum is the warmup. The real work: Divide an Array Into Subarrays With Minimum Cost II (heap + sliding window), Making A Large Island (DFS/BFS + union-find), and Trapping Rain Water (two pointers + stack). If you blank on any hard problem mid-assessment, StealthCoder solves it invisibly in seconds. But you should drill arrays and graph patterns first. The harder problems mix multiple topics, so pattern recognition matters more than raw speed.
Top problems at jio
| # | Problem | Diff | Frequency | Pass % | Patterns |
|---|---|---|---|---|---|
| 01 | Divide an Array Into Subarrays With Minimum Cost II | HARD | 100.0 | 30% | Array · Hash Table · Sliding Window |
| 02 | Find the Grid of Region Average | MEDIUM | 100.0 | 42% | Array · Matrix |
| 03 | Maximize the Number of Target Nodes After Connecting Trees I | MEDIUM | 100.0 | 70% | Tree · Depth-First Search · Breadth-First Search |
| 04 | Maximize the Number of Target Nodes After Connecting Trees II | HARD | 100.0 | 73% | Tree · Depth-First Search · Breadth-First Search |
| 05 | Two Sum | EASY | 62.6 | 56% | Array · Hash Table |
| 06 | Making A Large Island | HARD | 62.6 | 55% | Array · Depth-First Search · Breadth-First Search |
| 07 | Trapping Rain Water | HARD | 62.6 | 65% | Array · Two Pointers · Dynamic Programming |
Frequencies derived from public community-tagged interview reports. Click a row to view on LeetCode.
You have a week, maybe less. You can't out-grind the list above. StealthCoder runs invisibly during the actual jio OA. The proctor cannot see it. Screen share cannot detect it. Built by an engineer who got tired of watching his cohort grind for six months and still get filtered at the OA stage.
Get StealthCoder- array5 · 71%
- depth first search3 · 43%
- breadth first search3 · 43%
- hash table2 · 29%
- matrix2 · 29%
- tree2 · 29%
- sliding window1 · 14%
- heap priority queue1 · 14%
- union find1 · 14%
- two pointers1 · 14%
Array problems dominate the distribution, appearing in 5 of 7 reported questions. Depth-first search and breadth-first search each show up 3 times, always paired with trees or matrix traversal. Hash tables appear twice, often alongside array-based problems like Two Sum. The difficulty curve is steep: 4 of 7 are hard, suggesting Jio filters aggressively on problem-solving depth, not just correctness. Most hard problems require combining two or three patterns (array + heap, array + DFS/BFS, array + two pointers + stack). If you've drilled isolated topics but haven't combined them under time pressure, that's where StealthCoder becomes your safety net on the live assessment. Study the six top problems in order. Skip isolation. Practice them chained.
Companies with similar patterns
If you prepped for jio, these companies recycle ~60% of the same topics.
You've seen the list.
Now make sure you pass jio.
Memorizing every problem above in a week is a fantasy. StealthCoder is the hedge: an AI overlay that's invisible during screen share. It reads the problem on screen and surfaces a working solution in under 2 seconds. Built by an engineer who got tired of watching his cohort grind for six months and still get filtered at the OA stage. Works on HackerRank, CodeSignal, CoderPad, and Karat.
jio interview FAQ
Should I focus on array problems first for Jio?+
Yes. Arrays appear in 5 of 7 reported problems. Start with Two Sum (easy baseline), then Divide an Array Into Subarrays With Minimum Cost II and Trapping Rain Water (both hard, both combine arrays with other patterns). Build speed on array fundamentals before mixing in graph traversal.
How important is graph traversal (DFS/BFS) for this assessment?+
Critical. DFS and BFS each appear 3 times, always with trees or matrices. Maximize the Number of Target Nodes problems and Making A Large Island both test your ability to traverse and count efficiently. You can't skip this. Practice both algorithms on trees and grids until switching between them is automatic.
Is union-find necessary to study for Jio?+
It appears once, in Making A Large Island, but that problem also works with DFS/BFS. If you're short on time, master DFS/BFS first. Union-find is a bonus pattern that speeds up certain grid problems. It's not a blocker.
What's the hardest problem I should prepare for?+
Trapping Rain Water and Making A Large Island are the toughest reported. Trapping Rain Water chains array, two pointers, stack, and dynamic programming. Making A Large Island chains array, DFS, BFS, union-find, and matrix logic. Both require you to see the pattern, code it, and debug under pressure. Drill these two last, after you're solid on simpler array and graph problems.
How many hard problems should I solve before the assessment?+
You have 4 hard problems reported out of 7. Solve all 4 top problems once clean, then solve them again under timed conditions. The real test is pattern recognition combined with speed. Two or three reps per problem at full speed beats one slow, careful run-through.