Robinhood Interview Questions

Note: ensure you read the disclaimer on the previous page reading the accuracy and sourcing of these problems.

Validate a BST

Given a binary search tree like the one below, can you write a function that will return true if it is valid? 5 3 9 1 4 Recall that a BST is valid only given the following conditions: The left child subtree of a node contains only nodes with v...

Difficulty: 4/10

Targets and Vicinities

You're playing a game with a friend called **Target and Vicinity**. *Target and Vicinity* consists of one person thinking up a number in their head, and the other guessing that number. Sounds simple enough the caveat is that we also want to credit close guesses. To estimate the proximity of the ...

Difficulty: 6/10

How Out of Order

*This was submitted by user Hackleman.* Determine how "out of order" a list is by writing a function that returns the number of inversions in that list. Two elements of a list L , L i and L j , form an inversion if L i j . For example, the list 5, 4, 3, 2, 1 has 10 inversi...

Difficulty: 5/10

Add Linked List Numbers

We're provided the following two linked lists: 1 2 3 4 and 2 5 8 Each one represents a number in reversed order, so 1 2 3 4 represents 4321 and 2 5 8 represents 852 *note: for an extra challenge, consider if they weren't reversed* . The lists are guarante...

Difficulty: 7/10

Merge K (Multiple) Sorted Lists

You're given an array of multiple sorted linked lists. Can you write a method that returns it transformed into a single sorted linked list? Each linked list can be represented as a series of nodes with the following definition: js function Node val this.value val this.next...

Difficulty: 8/10

Find Duplicate Words

A very common interview challenge is to determine how often words appear in a given string or set of strings. Here's a version of this: return a list of duplicate words in a sentence. For example, given 'The dog is the best' , returns "the" . Likewise, given 'Happy thanksgiving, I am s...

Difficulty: 4/10

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

Data Visualization

Introduction In this lesson, we will introduce two new giant libraries: matplotlib and plotly . There are tons of visualization libraries in python, but matplotlib is the lowest level and most of the other libraries e.g. seaborn , ggplot , bokeh , etc. are built only on matplotlib. ...

Difficulty: 5/10

Functions and Scope

Introduction to Functions In JavaScript, functions are the building blocks of code. They allow us to encapsulate reusable blocks of code that perform a specific task. Functions are an essential part of JavaScript programming and play a vital role in simplifying our code and making it more organ...

Difficulty: 5/10

Testing and Continuous Integration

Introduction to Testing Testing is an essential part of software development. It is the process of evaluating the functionality and correctness of code. Just like in sports, where practice and training ensure the readiness of athletes for game day, testing is the practice that ensures the readi...

Difficulty: 5/10

Introduction to C++

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Difficulty: 5/10

Searching Algorithms

Introduction to Searching Algorithms In the world of problem solving, searching algorithms play a crucial role. They allow us to efficiently find specific elements in a collection of data. Imagine you are searching for a particular item in a large dataset searching algorithms help you find tha...

Difficulty: 5/10

Interview Reports

I rejected my software engineering internship offer from one of the Big Five companies (Facebook, Amazon, Apple, Microsoft, Google). Many of my friends were shocked when I told them that I accepted…

Why I Chose Robinhood Over the Big Five | by Yash Moondhra | The Startup | ...

Yash Moondhra

I rejected my software engineering internship offer from one of the Big Five companies (Facebook, Amazon, Apple, Microsoft, Google). Many of my friends were shocked when I told them that I accepted…

Working at Robinhood: Employee Reviews | Indeed.com...

Reviews from Robinhood employees about Robinhood culture, salaries, benefits, work-life balance, management, job security, and more.

Robinhood Interview Questions | Glassdoor...

Robinhood interview details: 336 interview questions and 280 interview reviews posted anonymously by Robinhood interview candidates.

People at Robinhood Say

This information was sourced from reviews originally posted on Glassdoor.

Amazing culture. People here are all excited to be here and are very much mission driven. I look forward to coming into work everyday, which apparently is an unusual feeling to have as a new grad.

The work you do matters. Instead of grunt work, you try to solve some of the hardest problems in the industry. Even if you're an intern.

Large amounts of project responsibilities have allowed me to grow at a faster rate relative to engineers at other companies.

I love working at Robinhood because my peers are some of the best in the industry across engineering, product, and legal. The people who work here are very excited about the mission, and their outlook about the future is bright.