# Robinhood Interview Questions

Robinhood Markets, Inc. is an American financial services company headquartered in Menlo Park, California, that facilitates commission-free trades of stocks, exchange-traded funds and cryptocurrencies via a mobile app introduced in March 2015.

It has got a 3.6* rating on Glassdoor and is considered one of the best product-based companies. It is highly regarded for its work-life balance.

They provide good training as well which will be beneficial in future too. You can practice the below questions collected from Robinhood Interview Experience for the interview. We have collected past frequently asked questions from Robinhood Interview Experience for your reference.

## Robinhood Array Questions

Question 1. Number of Orders in the Backlog Leetcode Solution Problem Statement The Number of Orders in the Backlog LeetCode Solution – “Number of Orders in the Backlog” states that given the 2D integer array [price, amount, orderType] which denotes that amount orders have been placed of type order type. If the order type is : 0, denotes the current ...

Question 2. Check given array of size n can represent BST of n levels or not Problem Statement Given an array with n elements, check given array of size n can represent BST of n levels or not. That is to check whether the binary search tree constructed using these n elements can represent a BST of n levels. Examples arr[] = {10, 8, 6, 9, ...

Question 3. Pair of Positive Negative Values in an Array In pair of positive negative values in an array problem we have given an array A of distinct integers, print all the pairs having positive value and negative value of a number that exists in the array. We need to print pairs in order of their occurrences. A pair whose ...

Question 4. Valid Triangle Number Problem In the Valid Triangle Number problem, we have given an array of non-negative integers. Find the number of triplets that can form a triangle. If we consider the numbers in the array as side lengths of the triangle. Example Input [ 2, 2, 3, 4 ] Output 3 Explanation We ...

Question 5. Largest Subarray with Equal Number of 0’s and 1’s Problem Statement In the “Largest Subarray with Equal Number of 0’s and 1’s” problem, we have given an array a[] containing only 0 and 1. Find the largest subarray with an equal number of 0’s and 1’s and will print the start index and end index of the largest subarray. ...

## Robinhood Tree Questions

Question 6. Check given array of size n can represent BST of n levels or not Problem Statement Given an array with n elements, check given array of size n can represent BST of n levels or not. That is to check whether the binary search tree constructed using these n elements can represent a BST of n levels. Examples arr[] = {10, 8, 6, 9, ...

## Robinhood Stack Questions

Question 7. Reversing the First K elements of a Queue In reversing the first K elements of a queue problem we have given a queue and a number k, reverse the first k elements of a queue using standard operations of the queue. Examples Input: queue = 10 -> 15 -> 31 -> 17 -> 12 -> 19 -> 2 ...

## Robinhood Queue Questions

Question 8. Reversing the First K elements of a Queue In reversing the first K elements of a queue problem we have given a queue and a number k, reverse the first k elements of a queue using standard operations of the queue. Examples Input: queue = 10 -> 15 -> 31 -> 17 -> 12 -> 19 -> 2 ...

## Robinhood Other Questions

Question 9. Valid Triangle Number LeetCode Solution Problem Statement Valid Triangle Number LeetCode Solution – Given an integer array nums, return the number of triplets chosen from the array that can make triangles if we take them as side lengths of a triangle. Input: nums = [2,2,3,4] Output: 3 Explanation: Valid combinations are: 2,3,4 (using the first 2) ...

Question 10. Valid Triangle Number LeetCode Solution Problem Statement: Valid Triangle Number LeetCode Solution says – Given an integer array nums, return the number of triplets chosen from the array that can make triangles if we take them as side lengths of a triangle. Example 1: Input: nums = [2,2,3,4] Output: 3 Explanation: Valid combinations are: 2,3,4 (using ...

Question 11. Diagonal Traversal LeetCode Solution Problem Statement Diagonal Traversal LeetCode Solution – Given a 2D integer array nums, return all elements of nums in diagonal order as shown in the below images. Input: nums = [[1,2,3],[4,5,6],[7,8,9]] Output: [1,4,2,7,5,3,8,6,9] Explanation for Diagonal Traversal LeetCode Solution Key Idea The first row and the last column in this problem would serve ...

Question 12. Brightest Position on Street LeetCode Solution Problem Statement Brightest Position on Street LeetCode Solution – We are asked to assume a number line representing a street. This street contains lamp(s) on it. We are given a 2D integer array “lights”. Each lights[i] = [position_i, range_i] indicates that there is a street lamp on position_i which can ...

Question 13. Asteroid Collision LeetCode Solution Problem Statement Asteroid Collision LeetCode Solution – We are given an array asteroids of integers representing asteroids in a row. For each asteroid, the absolute value represents its size, and the sign represents its direction (positive meaning right, negative meaning left). Each asteroid moves at the same speed. Find out the state ...

Question 14. Diagonal Traverse LeetCode Solution Problem Statement Diagonal Traverse LeetCode Solution – Given an m x n matrix mat, return an array of all the elements of the array in a diagonal order. Input: mat = [[1,2,3],[4,5,6],[7,8,9]] Output: [1,2,4,7,5,3,6,8,9] Explanation Consider the indices of the diagonals of an NxM matrix. Let’s use a 4×4 matrix as an example: ...

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