Problem database last updated: June 20, 2025
16 problems · 6 Easy, 9 Medium, 1 Hard · Ranked #106 of 458
6 Easy
38% · avg 23%
9 Medium
56% · avg 59%
1 Hard
6% · avg 18%
Based on 16 reported problems, Accolite interviews are easier than average - only 6% Hard compared to 18% across all companies. The majority (56%) of questions are Medium difficulty, which is typical for companies that want to see solid fundamentals without excessive trick questions.
Compared to the industry average, Accolite puts unusual emphasis on sliding-window (12.5% of problems, 2.7x the industry average), two-pointers (31.3% of problems, 2.3x the industry average), stack (18.8% of problems, 2.2x the industry average). If you're short on time, these are the categories to double down on.
The most common topics are array (50%), string (43.8%), dynamic-programming (31.3%), two-pointers (31.3%). Problems below are sorted by frequency, the ones at the top are asked most often.
| Problem | Difficulty | Frequency | Topics | |
|---|---|---|---|---|
Replace the Substring for Balanced String You are given a string s of length n containing only four kinds of characters: 'Q', 'W', 'E', and 'R'. | Medium | Very Likely | stringsliding-window | Solve |
Climbing Stairs You are climbing a staircase. It takes n steps to reach the top. | Easy | Likely | mathdynamic-programmingmemoization | 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 |
Longest Palindromic Substring Given a string s, return the longest palindromic substring in s. | Medium | Likely | two-pointersstringdynamic-programming | Solve |
Valid Parentheses Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. | Easy | Likely | stringstack | Solve |
Binary Tree Right Side View Given the root of a binary tree, imagine yourself standing on the right side of it, return the values of the nodes you can see ordered from top to bottom. | Medium | Likely | treedepth-first-searchbreadth-first-search | Solve |
Longest Substring Without Repeating Characters Given a string s, find the length of the longest substring without duplicate characters. | Medium | Likely | hash-tablestringsliding-window | Solve |
Search in Rotated Sorted Array There is an integer array nums sorted in ascending order (with distinct values). | Medium | Likely | arraybinary-search | Solve |
Remove Duplicates from Sorted Array II Given an integer array nums sorted in non-decreasing order, remove some duplicates in-place such that each unique element appears at most twice. The relative or... | Medium | Likely | arraytwo-pointers | Solve |
Asteroid Collision We are given an array asteroids of integers representing asteroids in a row. The indices of the asteroid in the array represent their relative position in space... | Medium | Likely | arraystacksimulation | Solve |
Best Time to Buy and Sell Stock You are given an array prices where prices[i] is the price of a given stock on the ith day. | Easy | Likely | arraydynamic-programming | Solve |
Longest Common Prefix Write a function to find the longest common prefix string amongst an array of strings. | Easy | Likely | arraystringtrie | Solve |
Reverse Vowels of a String Given a string s, reverse only all the vowels in the string and return it. | Easy | Likely | two-pointersstring | Solve |
Container With Most Water You are given an integer array height of length n. There are n vertical lines drawn such that the two endpoints of the ith line are (i, 0) and (i, height[i]). | Medium | Likely | arraytwo-pointersgreedy | 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 Common Subsequence Given two strings text1 and text2, return the length of their longest common subsequence. If there is no common subsequence, return 0. | Medium | Likely | stringdynamic-programming | Solve |
Replace the Substring for Balanced String
SolveYou are given a string s of length n containing only four kinds of characters: 'Q', 'W', 'E', and 'R'.
Climbing Stairs
SolveYou are climbing a staircase. It takes n steps to reach the top.
Two Sum
SolveGiven an array of integers nums and an integer target, return the indices of the two numbers that add up to target.
Longest Palindromic Substring
SolveGiven a string s, return the longest palindromic substring in s.
Valid Parentheses
SolveGiven a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.
Binary Tree Right Side View
SolveGiven the root of a binary tree, imagine yourself standing on the right side of it, return the values of the nodes you can see ordered from top to bottom.
Longest Substring Without Repeating Characters
SolveGiven a string s, find the length of the longest substring without duplicate characters.
Search in Rotated Sorted Array
SolveThere is an integer array nums sorted in ascending order (with distinct values).
Remove Duplicates from Sorted Array II
SolveGiven an integer array nums sorted in non-decreasing order, remove some duplicates in-place such that each unique element appears at most twice. The relative or...
Asteroid Collision
SolveWe are given an array asteroids of integers representing asteroids in a row. The indices of the asteroid in the array represent their relative position in space...
Best Time to Buy and Sell Stock
SolveYou are given an array prices where prices[i] is the price of a given stock on the ith day.
Longest Common Prefix
SolveWrite a function to find the longest common prefix string amongst an array of strings.
Reverse Vowels of a String
SolveGiven a string s, reverse only all the vowels in the string and return it.
Container With Most Water
SolveYou are given an integer array height of length n. There are n vertical lines drawn such that the two endpoints of the ith line are (i, 0) and (i, height[i]).
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 Common Subsequence
SolveGiven two strings text1 and text2, return the length of their longest common subsequence. If there is no common subsequence, return 0.
Frequency scores are based on crowdsourced interview reports. A higher score means the problem has been reported more often in recent Accolite interviews.
Very Likely
75-100%
Likely
50-74%
Sometimes
25-49%
Rare
0-24%
Accolite interviews focus heavily on array, string, dynamic-programming 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. Accolite 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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Accolite has been reported to ask 16 distinct coding problems. The most common topics are array, string, dynamic-programming. 6 are Easy difficulty, 9 are Medium, and 1 are Hard. Problems are sorted by frequency - the ones at the top are asked most often.
Based on 16 reported problems, Accolite interviews are easier than average - only 6% Hard compared to 18% across all companies. 56% 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: array, string, dynamic-programming. 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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