Dashboard Questions Topics Companies Sheets

ION Interview Questions

53 coding problems asked in ION interviews. Prepare for your technical interview with real questions.

Problems

Easy

Medium

Hard

Difficulty

Title	Solve	Difficulty	Companies	Topics
5. Longest Palindromic Substring	Solve	Medium	Accenture+50	Dynamic Programming String+1
17. Letter Combinations of a Phone Number	Solve	Medium	Airtel+34	Backtracking Hash Table+1
33. Search in Rotated Sorted Array	Solve	Medium	Accenture+91	Array Binary Search
34. Find First and Last Position of Element in Sorted Array	Solve	Medium	Adobe+18	Array Binary Search
36. Valid Sudoku	Solve	Medium	Amazon+9	Array Hash Table+1
42. Trapping Rain Water	Solve	Hard	Adobe+21	Array Dynamic Programming+3
46. Permutations	Solve	Medium	Accenture+39	Array Backtracking
49. Group Anagrams	Solve	Medium	Adobe+23	Array Hash Table+2
62. Unique Paths	Solve	Medium	Accoloite+41	Combinatorics Dynamic Programming+1
63. Unique Paths II	Solve	Medium	Amazon+19	Array Dynamic Programming+1
74. Search a 2D Matrix	Solve	Medium	Accenture+23	Array Binary Search+1
92. Reverse Linked List II	Solve	Medium	1218 Global+122	Linked List
111. Minimum Depth of Binary Tree	Solve	Easy	Acko+15	Binary Tree Breadth-First Search+2
121. Best Time to Buy and Sell Stock	Solve	Easy	Adobe+30	Array Dynamic Programming
135. Candy	Solve	Hard	Adobe+21	Array Greedy
141. Linked List Cycle	Solve	Easy	42gearMobilitySystems+131	Hash Table Linked List+1
200. Number of Islands	Solve	Medium	Adobe+40	Array Breadth-First Search+3
218. The Skyline Problem	Solve	Hard	Cruise Automation+3	Array Binary Indexed Tree+5
225. Implement Stack using Queues	Solve	Easy	Accenture+54	Design Queue+1
229. Majority Element II	Solve	Medium	Accolite+21	Array Counting+2
239. Sliding Window Maximum	Solve	Hard	Accion Labs India+66	Array Heap (Priority Queue)+3
267. Palindrome Permutation II	Solve	Medium	Cruise Automation+1	Backtracking Hash Table+1
274. H-Index	Solve	Medium	Alation+4	Array Counting Sort+1
287. Find the Duplicate Number	Solve	Medium	Adobe+30	Array Binary Search+2
300. Longest Increasing Subsequence	Solve	Medium	Accenture+78	Array Binary Search+1
392. Is Subsequence	Solve	Easy	Accolite+15	Dynamic Programming String+1
394. Decode String	Solve	Medium	Adobe+16	Recursion Stack+1
435. Non-overlapping Intervals	Solve	Medium	Amazon+7	Array Dynamic Programming+2
478. Generate Random Point in a Circle	Solve	Medium	Leap Motion	Geometry Math+2
518. Coin Change II	Solve	Medium	Accenture+68	Array Dynamic Programming
557. Reverse Words in a String III	Solve	Easy	Accolite+27	String Two Pointers
629. K Inverse Pairs Array	Solve	Hard	Bytedance+1	Dynamic Programming
712. Minimum ASCII Delete Sum for Two Strings	Solve	Medium	Activision+2	Dynamic Programming String
735. Asteroid Collision	Solve	Medium	Amazon+15	Array Simulation+1
844. Backspace String Compare	Solve	Easy	Amazon+12	Simulation Stack+2
880. Decoded String at Index	Solve	Medium	Adobe+4	Stack String
1094. Car Pooling	Solve	Medium	Amazon+7	Array Heap (Priority Queue)+3
1258. Synonymous Sentences	Solve	Medium	Amazon+1	Array Backtracking+3
1330. Reverse Subarray To Maximize Array Value	Solve	Hard	Bloomberg+1	Array Greedy+1
1352. Product of the Last K Numbers	Solve	Medium	Amazon+3	Array Data Stream+3
1361. Validate Binary Tree Nodes	Solve	Medium	Amazon+15	Binary Tree Breadth-First Search+4
1441. Build an Array With Stack Operations	Solve	Medium	24/7 Innovation Labs+4	Array Simulation+1
1617. Count Subtrees With Max Distance Between Cities	Solve	Hard	Codenation	Bit Manipulation Bitmask+3
1654. Minimum Jumps to Reach Home	Solve	Medium	Karat+3	Array Breadth-First Search+1
1682. Longest Palindromic Subsequence II	Solve	Medium	Codenation	Dynamic Programming String
1739. Building Boxes	Solve	Hard	Codenation	Binary Search Greedy+1
1960. Maximum Product of the Length of Two Palindromic Substrings	Solve	Hard	Codenation	Hash Function Rolling Hash+1
2003. Smallest Missing Genetic Value in Each Subtree	Solve	Hard	Codenation	Depth-First Search Dynamic Programming+2
2310. Sum of Numbers With Units Digit K	Solve	Medium	Codenation	Dynamic Programming Enumeration+2
2811. Check if it is Possible to Split Array	Solve	Medium	MoneyLion	Array Dynamic Programming+1