Optiver Software Engineer Coding & Algorithms Interview Questions
Practice 16 real Coding & Algorithms interview questions for Software Engineer roles at Optiver.
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Design a queue and analyze tradeoffs
Design a FIFO queue data structure that supports enqueue, dequeue, peek, and isEmpty. Compare implementations using a singly linked list, a dynamic ar...
Optimize flight and cargo bookings for profit
OptiCargo: make the booking algorithm profitable You are given two streams/lists: - Flights you may attempt to book. Each flight has: - flight_id ...
Implement price-based order matcher
Design and implement a price-based order matcher for unit-sized orders. You are given an array orders where each element is [type, price]: type = 1 de...
Design a circular queue data structure
Problem Design and implement a fixed-capacity circular queue that supports constant-time operations. A circular queue stores elements in an array of s...
Explain OS processes, threads, and memory
Explain core operating system concepts: processes vs threads, context switching, and scheduling (preemptive vs cooperative and common algorithms). Des...
Design a satellite propagation simulator
Implement a SatelliteNetwork class to simulate message propagation over an undirected satellite graph. Provide these methods: ( 1) satellite_connected...
Compare common data structures and uses
Compare common data structures and select appropriate ones for specific tasks. For arrays, linked lists, stacks, queues, hash tables, binary search tr...
Design a balloon stability tracker
Implement a class BalloonFestival to manage hot-air balloons and wind fields over time, and to report rewarded balloons at inspection times. Methods a...
Detect currency arbitrage with costs
You are given a K×K matrix R of currency exchange rates where R[i][j] is the amount of currency j obtainable for one unit of currency i, and R[i][i] =...
Decide and implement DP/heap and approximation
You have 90 minutes to complete three related coding tasks: a) Dynamic programming: Given an integer array nums (n ≤ 2e 5) and a threshold T, design a...
Identify OS component causing process starvation
A system with 2 CPU cores runs 5 identical processes continuously. Four processes get equal CPU time, but the fifth appears to get none. Which part of...
Solve three mini-game algorithm tasks
Solve three mini-game algorithm tasks: (a) Move-House Puzzle: Given initial and target arrangements of N labeled blocks ("houses") on a 2D grid with o...
Count nonnegative buy/sell sequences
You must perform exactly 2n unit trades starting with 0 shares and ending with 0 shares. Each trade is either a buy (+1 share) or a sell (−1 share), a...
Estimate expected comparisons in a BST
In a particular binary search tree, finding node A takes 1 comparison and finding node D takes 3 comparisons. What is the expected number of compariso...
Simulate satellite message propagation with timing
Design and implement the SatelliteNetwork to process a stream of N instructions: - SatelliteConnected(SatelliteId): add a satellite; invoke ErrDuplica...
Design a Balloon Festival Simulator
Implement a class BalloonFestival with the following API and rules. Goal Track hot air balloons (yours and competitors), evolving wind fields, and bal...