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Robinhood Medium Interview Questions

11 medium-level practice questions for Robinhood technical interviews

coding Medium Verified Question #1

1. Find Maximum Trade Shares


Category: String coding problem
A stock exchange processes a stream of trade orders sequentially. Each order specifies a limit price, a quantity of shares, and a side (either...
Input: List
Output: Computed result
coding Medium Verified Question #2

2. Social Network Money Transfers


Category: Trie-based coding problem
You are building the backend for a peer-to-peer payment app embedded in a social network. The system processes a sequence of commands, one per line,...
Input: String
Output: Printed output
coding Medium Verified Question #3

3. Top 10 Words


Category: Trie-based coding problem
Given a string of text, find the ten most frequently occurring words. A word is defined as any maximal sequence of consecutive alphabetic characters...
Input: List
Output: Array
coding Medium Verified Question #4

4. Candlestick Data Generator


Category: Interval-based coding problem
A trading platform displays price data as candlestick charts. Each candlestick summarizes trading activity over a fixed time interval and contains...
Input: List
Output: Computed result
coding Medium Verified Question #5

5. Find Middle Course


Category: Algorithm coding problem
A university curriculum is structured as a sequence of prerequisite pairs. Each pair [prereq, course] means prereq must be taken before course.
Input: Integer(s)
Output: Computed result
coding Medium Verified Question #6

6. Employee Referral Program


Category: Tree coding problem
A company runs a referral program where employees can refer new hires. When employee A refers employee B, A receives credit not only for B but also...
Input: List
Output: Computed result
coding Medium Verified Question #7

7. Fractional Order


Category: Algorithm coding problem
A brokerage supports fractional share trading. All share quantities are represented in hundredths (e.g., 150 means 1.50 shares). The system maintains...
Input: List
Output: Computed result
coding Medium Verified Question #8

8. Margin Call


Category: Trie-based coding problem
A brokerage account starts with $1000 in cash and no stock positions. You are given a list of trades, where each trade is represented as `[timestamp,...
Input: List
Output: Computed result
coding Medium Verified Question #9

9. Load Factor Calculation


Category: Graph coding problem
A microservice architecture is modeled as a directed acyclic graph (DAG). Each service may depend on other services. Traffic enters the system...
Input: Graph (nodes and edges)
Output: Array
coding Medium Verified Question #10

10. Maximize Future Portfolio Value


Category: Algorithm coding problem
You have a budget of m dollars to invest in securities. Each security is described by [symbol, currentPrice, futurePrice, maxShares]. Fractional...
Input: Integer(s)
Output: Integer
coding Medium Verified Question #11

11. [Web Eng] Event Logger


Category: Interval-based coding problem
You are building a client-side event logging system for a web application. The page contains several colored elements that users can click. Your task...
Input: Array
Output: Computed result

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