CodeSignal OAs software engineer interviews cover algorithms, data structures, system design, and coding problems drawn from real interview rounds.
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coding
Easy
Verified Question
#1
1. [CodeSignal] Coin Table Game
Category: String coding problem
Question A player is playing a game in which coins are placed on and removed from a table. The game consists of multiple rounds. At the beginning...
Input: StringOutput: Computed result
coding
Easy
Verified Question
#2
2. [CodeSignal] Count Non-Dominant Elements
Category: Array coding problem
Question Given an array of integers numbers, count all elements that are not equal to numbers[0] or numbers[1] (if those indices exist in the...
Output: Computed result
coding
Easy
Verified Question
#3
3. [CodeSignal] Sort Words By Vowel Consonant Difference
Category: Array coding problem
Question You are given a string text consisting of unique lowercase English words separated by spaces. For each word, compute the absolute...
Output:** Computed result
coding
Easy
Verified Question
#4
4. [CodeSignal] Filtered Palindrome Check
Category: Array coding problemGiven two character arrays
skipChars and inputChars, determine whether inputChars forms a palindrome after removing all characters that appear...Input: ArrayOutput: Printed output
coding
Easy
Verified Question
#5
5. [CodeSignal] Adjacent Character Removal
Category: Algorithm coding problemYou have a word of length
L made up only of lowercase English letters. A character at position i is called a conflict if it equals the...Input: Number(s)Output: Integer
coding
Easy
Verified Question
#6
6. [CodeSignal] Movie Group Ranker
Category: Array coding problemYou are building a movie recommendation system. Given a source movie a user liked, you receive: - An array
scores where scores[i] is the...Input: ArrayOutput: Integer
coding
Easy
Verified Question
#7
7. [CodeSignal] One-Hot Encoder
Category: Matrix coding problemGiven an integer array
arr, return its one-hot encoded matrix as a 2D array. In a one-hot encoding: - Each row represents one element from arr. -...Input: Matrix (2D array)Output: Computed result
coding
Easy
Verified Question
#8
8. [CodeSignal] Stable Server Segments
Category: Array coding problem
[CodeSignal] Stable Server Segments
Input: ArrayOutput: Computed result
coding
Easy
Verified Question
#9
9. [CodeSignal] Cyclic Consonant Shift
Category: String coding problemYou are given a string s consisting of lowercase English letters. Transform each character using the following rules: - If the character is a vowel...Input: String
Output: Computed result
coding
Easy
Verified Question
#10
10. [CodeSignal] Vowel Enclosed Reversal
Category: Array coding problemYou are given an array of strings text. For each word that starts and ends with a vowel (case-insensitive: a, e, i, o, u), reverse the substring...Input: Array of strings
Output: Computed result
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