15 practice questions for Robinhood SRE interviews
Robinhood SRE interviews focus on reliability engineering, incident management, capacity planning, monitoring, and balancing system stability with feature velocity.
1. Most Frequent Robinhood System Design Questions
Category: Priority queue system design problem# System Design Questions - Robinhood Robinhood has a fairly fixed System Design Bank and usually asks one of these 2 questionsInput: Given input Output: Computed result
codingMediumVerified Question#2
2. Find Maximum Trade Shares
Category: String coding problemA 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
codingHardVerified Question#3
3. Maximum Multiplier Path
Category: Graph coding problemYou are given a directed graph with n nodes labeled 0 through n - 1. Each directed edge connects node u to node v and carries an integer...Input: Graph (nodes and edges) Output: Integer
codingMediumVerified Question#4
4. Social Network Money Transfers
Category: Trie-based coding problemYou 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
codingMediumVerified Question#5
5. Top 10 Words
Category: Trie-based coding problemGiven 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
codingHardVerified Question#6
6. Stock Trades Matching
Category: Graph coding problemA brokerage reconciliation system compares two lists of trade confirmations: one from the in-house system (house) and one from the street-side...Input: Graph (nodes and edges) Output: Computed result
codingEasyVerified Question#7
7. Offset Commit
Category: Algorithm coding problemA message broker tracks which stream offsets have been fully processed. Offsets arrive out of order, and the broker maintains a "committed offset"...Input: List Output: Array
codingMediumVerified Question#8
8. Candlestick Data Generator
Category: Interval-based coding problemA 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
codingMediumVerified Question#9
9. Find Middle Course
Category: Algorithm coding problemA 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
codingMediumVerified Question#10
10. Employee Referral Program
Category: Tree coding problemA 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
codingMediumVerified Question#11
11. Fractional Order
Category: Algorithm coding problemA 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
codingMediumVerified Question#12
12. Margin Call
Category: Trie-based coding problemA 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
codingMediumVerified Question#13
13. Load Factor Calculation
Category: Graph coding problemA 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
codingMediumVerified Question#14
14. Maximize Future Portfolio Value
Category: Algorithm coding problemYou 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
codingMediumVerified Question#15
15. [Web Eng] Event Logger
Category: Interval-based coding problemYou 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