Square full stack engineer interviews cover both frontend and backend topics including API design, database modelling, React or Vue components, and end-to-end system design.
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coding
Medium
Verified Question
#1
1. Connect Four
Category: Grid/matrix coding problem# Question Design a
ConnectFour class that implements the Connect Four board game. The board is a 6-row by 7-column grid. Two players take turns...Input: 2D gridOutput: Printed output
coding
Medium
Verified Question
#2
2. Page Navigator
Category: Sliding window coding problem# Question Design a
PageNavigator class that simulates a paginated view with a sliding window. Given a total number of pages and a window size, the...Input: ListOutput: Computed result
coding
Medium
Verified Question
#3
3. Grid Exits
Category: Grid/matrix coding problem# Question You are given a 2D grid containing open cells (
".") and walls ("#"). An exit is any open cell on the border of the grid that is...Input: 2D gridOutput: Integer
coding
Medium
Verified Question
#4
4. Item Price Manager
Category: Algorithm coding problem# Question Design an
ItemPriceManager class that tracks the price history of an item over time and supports querying the price at any date and the...Input: Given inputOutput: Computed result
coding
Easy
Verified Question
#5
5. Pig Latin Translator
Category: Algorithm coding problem# Question Translate a sentence into Pig Latin using the following rules: Rules: 1. If a word begins with a vowel (
a, e, i, o, u),...Input: Given inputOutput: Computed result
coding
Medium
Verified Question
#6
6. Frequency Merge Tree
Category: Tree coding problem# Question Given a string, build a Frequency Merge Tree as follows: 1. Count the frequency of each character in the string. 2. Create a leaf node...Input: String
Output: Computed result
coding
Easy
Verified Question
#7
7. Obstacle Grid Blocks
Category: Grid/matrix coding problem# Question You are given two integers
R and C representing the number of rows and columns in a grid (0-indexed). You are also given a list...Input: 2D gridOutput: Computed result
coding
Medium
Verified Question
#8
8. Soccer Tournament Tracker
Category: String coding problem# QuestionInput: Array of strings
Output: Array
coding
Easy
Verified Question
#9
9. Candy Bag Matcher
Category: String coding problem# QuestionInput: Array of strings
Output: Array
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