Coinbase Interview Questions

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Find Shortest Palindrome Possible

We have a string str like the following: js const str "bubble" Find a way to convert it to a palindrome by inserting characters in front of it. Recall that a palindrome is defined as "a word, phrase, or sequence that reads the same backward as forward". What's the shortes...

Difficulty: 5/10

Find in Shifted Sorted Matrix

Understanding the Matrix Shift Problem Suppose you have a matrix where each row and column is sorted in ascending order. Your task is to apply two specific types of shifts, described below, and locate a given element x in the transformed matrix. Shift Types **Left Circular Shift l :** ...

Difficulty: 8/10

Matrix Operations

Here's a fun one: let's say we have a 2D array matrix that is a size of m rows and n columns. It is initially prefilled with 0 s and looks like the following: js 0, 0, 0, 0 , 0, 0, 0, 0 , 0, 0, 0, 0 We are then given a list of increment operations to be performed on ...

Difficulty: 7/10

Implement the Trie Data Structure

Suppose you're asked during an interview to design an autocompletion system. On the client side, you have an input box. When users start typing things into the input, it should parse what's been typed and make suggestions based on that. For example, if the user has typed "cat", we may fetch "c...

Difficulty: 7/10

Dutch National Flag Problem

This problem is named the "Dutch national flag problem" because the flag of the Netherlands is comprised of the colors red, white, and blue in separate parts. Although we won't be using colors, the premise of the challenge is to develop a sorting algorithm that performs some form of separations of th...

Difficulty: 8/10

Implement a Stack With Minimum

Recall that a stack is an abstract data type modeling a collection of elements. Its primary operations are push which adds an element to the top of the stack and pop which removes the most newest element . Traditionally, a stack can easily be implemented in many dynamic languages using an a...

Difficulty: 6/10

How Deep Does It Go? Maximum Depth of Binary tree

Write a method to determine how deep a binary tree lessons an intro to binary trees and search trees goes. The tree's depth can be described as the number of nodes you encounter as you traverse from the root node to a leaf . The root node is the topmost node, and a leaf is a node wi...

Difficulty: 6/10

Implement a Graph

Since a graph lessons simple reference to graphs is one of the more difficult data structures to conceptualize in a programmatic 2D manner, let's go ahead and implement it! We'll go with an adjacency list version. Note that there's also the adjacency matrix method which we will cover later....

Difficulty: 4/10

Count the Planes

Assume that we are building software to determine how many planes are in the sky. The data that we have on planes currently in the air comes in the form of a grid, modeled by a matrix array. See below: '.', '.', '.', 'P' , '.', '.', '.', 'P' , 'P', 'P', '.', 'P' , '.', '.', '.',...

Difficulty: 5/10

Arrays

Introduction to Arrays Arrays are a fundamental data structure for storing and manipulating data efficiently. They play a crucial role in various domains, including robotics and computer vision. Arrays allow us to organize similar data in a coherent and systematic manner, making it easier to a...

Difficulty: 5/10

High Level Design

Introduction to High Level Design High level design is an architectural approach to designing software systems that focus on the overall structure and organization of the system. It involves defining the major components of the system, their relationships, and the interfaces between them. In h...

Difficulty: 5/10

QA and Testing Interview Questions Cheat Sheet

Introduction: The Underrated Importance of Software Testing Why Testing Matters in Interviews Software Testing is a crucial phase in the development cycle that often doesn't get the attention it deserves, especially when preparing for interviews. However, this area is fertile ground for qu...

Difficulty: 5/10

Interview Reports

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26 Coinbase Interview Questions (with Answers)...

Practice 26 Coinbase Interview Questions with professional interview answer examples with advice on how to answer each question. With an additional 51 professionally written interview answer examples.

Hiring Hacks: An Inside Look Into Coinbase's Recruiting Approach...

It’s no secret that today’s recruiters are faced with the daunting challenges of competing with other companies to hire not only the best engineers, but ones t…

People at Coinbase Say

This information was sourced from reviews originally posted on Glassdoor.

Coinbase doesn't have time to slow down. We just did our direct listing and everyone is back to work since we have a very big mission to execute towards: economic freedom for the entire world.

Coinbase does so many things to make sure you enjoy your job. Amazing benefits. The crypto industry is really exciting and hard work pays off. Lots of smart people who are good to work with and the company outlook is generally positive.

Very good compensation, great colleagues, clear career development tracks for both ICs and EMs. Lots of opportunites to give feedback to leadership and it gets addressed most of the time.