Problem database last updated: June 20, 2025
11 problems · 2 Easy, 8 Medium, 1 Hard · Ranked #131 of 458
2 Easy
18% · avg 23%
8 Medium
73% · avg 59%
1 Hard
9% · avg 18%
Based on 11 reported problems, ConsultAdd interviews are in line with industry averages - 9% Hard vs 18% overall. The majority (73%) 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, ConsultAdd puts unusual emphasis on greedy (27.3% of problems, 3.2x the industry average), sorting (36.4% of problems, 2.5x the industry average), matrix (18.2% of problems, 2.1x the industry average). If you're short on time, these are the categories to double down on.
The most common topics are array (63.6%), string (45.5%), sorting (36.4%), greedy (27.3%). Problems below are sorted by frequency, the ones at the top are asked most often.
| Problem | Difficulty | Frequency | Topics | |
|---|---|---|---|---|
Zigzag Conversion The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better... | Medium | Very Likely | string | Solve |
Rotate Image You are given an n x n 2D matrix representing an image, rotate the image by 90 degrees (clockwise). | Medium | Very Likely | arraymathmatrix | Solve |
Candy There are n children standing in a line. Each child is assigned a rating value given in the integer array ratings. | Hard | Very Likely | arraygreedy | Solve |
Coin Change You are given an integer array coins representing coins of different denominations and an integer amount representing a total amount of money. | Medium | Very Likely | arraydynamic-programmingbreadth-first-search | Solve |
Jump Game II You are given a 0-indexed array of integers nums of length n. You are initially positioned at index 0. | Medium | Very Likely | arraydynamic-programminggreedy | Solve |
Count and Say The count-and-say sequence is a sequence of digit strings defined by the recursive formula: | Medium | Very Likely | string | Solve |
Minimum Deletions to Make Character Frequencies Unique A string s is called good if there are no two different characters in s that have the same frequency. | Medium | Very Likely | hash-tablestringgreedy | Solve |
Transpose Matrix Given a 2D integer array matrix, return the transpose of matrix. | Easy | Very Likely | arraymatrixsimulation | Solve |
Merge Intervals Given an array of intervals where intervals[i] = [starti, endi], merge all overlapping intervals, and return an array of the non-overlapping intervals that cove... | Medium | Very Likely | arraysorting | Solve |
Valid Anagram Given two strings s and t, return true if t is an anagram of s, and false otherwise. | Easy | Very Likely | hash-tablestringsorting | Solve |
Group Anagrams Given an array of strings strs, group the anagrams together. You can return the answer in any order. | Medium | Very Likely | arrayhash-tablestring | Solve |
Zigzag Conversion
SolveThe string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better...
Rotate Image
SolveYou are given an n x n 2D matrix representing an image, rotate the image by 90 degrees (clockwise).
Candy
SolveThere are n children standing in a line. Each child is assigned a rating value given in the integer array ratings.
Coin Change
SolveYou are given an integer array coins representing coins of different denominations and an integer amount representing a total amount of money.
Jump Game II
SolveYou are given a 0-indexed array of integers nums of length n. You are initially positioned at index 0.
Count and Say
SolveThe count-and-say sequence is a sequence of digit strings defined by the recursive formula:
Minimum Deletions to Make Character Frequencies Unique
SolveA string s is called good if there are no two different characters in s that have the same frequency.
Transpose Matrix
SolveGiven a 2D integer array matrix, return the transpose of matrix.
Merge Intervals
SolveGiven an array of intervals where intervals[i] = [starti, endi], merge all overlapping intervals, and return an array of the non-overlapping intervals that cove...
Valid Anagram
SolveGiven two strings s and t, return true if t is an anagram of s, and false otherwise.
Group Anagrams
SolveGiven an array of strings strs, group the anagrams together. You can return the answer in any order.
Frequency scores are based on crowdsourced interview reports. A higher score means the problem has been reported more often in recent ConsultAdd interviews.
Very Likely
75-100%
Likely
50-74%
Sometimes
25-49%
Rare
0-24%
ConsultAdd interviews focus heavily on array, string, sorting 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. ConsultAdd 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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ConsultAdd has been reported to ask 11 distinct coding problems. The most common topics are array, string, sorting. 2 are Easy difficulty, 8 are Medium, and 1 are Hard. Problems are sorted by frequency - the ones at the top are asked most often.
Based on 11 reported problems, ConsultAdd interviews are in line with industry averages - 9% Hard vs 18% overall. 73% 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, sorting. 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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