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Interview questions by company and topic | SysRound

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155 questions

Showing 26–50

Practical engineeringMedium
Make a Web Crawler Concurrent with Thread-Safe Visited State
Companies: Anthropic
Concurrency · Graphs
Last reported Oct 2026
Open workspace
Practical engineeringHard
Implement malloc and free over Fixed Memory, Then Make Both Logarithmic
Companies: OpenAI
Data Structure Design · Memory Management
Last reported Oct 2026
Open workspace
Practical engineeringDifficulty not specified
Delivery Dashboard System
Design a delivery tracking system for a food delivery company that manages driver payment rates and records delivery costs based on time spent. Implement an…
Companies: Rippling

Page 2 of 7

Last reported Oct 2026

Practical engineeringDifficulty not specified

Fix Async Eligibility Update Bug in an Appointment System

Given a fullstack codebase, resolve a bug where an async process updates an appointment guest's eligibility criteria but fails to reflect the side effects on…

Companies: Headway

Last reported Oct 2026

Practical engineeringDifficulty not specified

Friend Recommendation System

Design and implement a friend recommendation system that suggests up to 5 potential friends for each user, excluding the user themselves and existing friends. Consider…

Companies: Meta

Last reported Oct 2026

Practical engineeringMedium

Implement a fault-tolerant work queue that never loses tasks when workers fail

Companies: OpenAI

Concurrency · Data Structure Design

Last reported Oct 2026

Practical engineeringDifficulty not specified

Debug a Deeply Embedded Bug in a Python Library

Given a Python library with failing tests, identify and fix a deeply embedded bug by tracing through API call execution paths. You will run the…

Companies: Stripe

Last reported Sep 2026

Practical engineeringMedium

Implement a GPU credit ledger with expiring grants and out-of-order operations

Companies: OpenAI

Data Structure Design · Heaps & Priority Queues

Last reported Sep 2026

Practical engineeringMedium

Spreadsheet engine with setCell/getCell, cell references, and cycle detection

Companies: OpenAI

Data Structure Design · Graphs

Last reported Sep 2026

Practical engineeringDifficulty not specified

Debug DAG Execution Order Code

Given Python code that determines the correct execution order of nodes in a Directed Acyclic Graph (DAG) representing a step function, identify and fix the…

Companies: Amazon

Last reported Sep 2026

Practical engineeringMedium

GPU Credit Ledger: Spend Earliest-Expiring Credits First, Stop on Overdraft

Companies: OpenAI

Data Structure Design · Heaps & Priority Queues

Last reported Sep 2026

Practical engineeringHard

Count Events in a Trailing 15-Minute Window with a Fixed-Size Ring Buffer

Companies: OpenAI

Data Structure Design

Last reported Sep 2026

Practical engineeringDifficulty not specified

E-Commerce API Code Review

Review the back-end API responsible for processing purchase orders. Evaluate the code for correctness, scalability, and adherence to best practices.

Companies: Asurion

Last reported Sep 2026

Practical engineeringHard

Fault-Tolerant Work Queue with Leases, Fencing Tokens and DAG Task Dependencies

Companies: OpenAI

Distributed Coordination · Job Scheduling & Workflows

Last reported Sep 2026

Practical engineeringHard

Find a Hidden Number When Each Comparison Answer Arrives One Call Late

Companies: OpenAI

Binary Search

Last reported Sep 2026

Practical engineeringHard

Follow Graph with Cheap Snapshots and Top-K Follow Recommendations

Companies: OpenAI

Data Structure Design · Graphs

Last reported Sep 2026

Practical engineeringHard

GPU Credit Ledger with Expiring Grants, Out-of-Order Operations and Fast Balances

Companies: OpenAI

Data Structure Design · Heaps & Priority Queues

Last reported Sep 2026

Practical engineeringHard

In-Memory Key-Value Store with Crash Recovery from a Log and Concurrent Access

Companies: OpenAI

Concurrency · Key-Value Stores

Last reported Sep 2026

Practical engineeringHard

Plant Infection Grid Simulation: Days to Stabilize, Immune Plants, Expiring Immunity

Companies: OpenAI

Graphs · Grids & Matrices

Last reported Sep 2026

Practical engineeringHard

Text Editor in Four Stages: Buffer, Undo/Redo, Trie Autocomplete, Collaborative OT

Companies: OpenAI

Data Structure Design · Real-Time Systems

Last reported Sep 2026

Practical engineeringHard

Toy Language Types: Render Types and Signatures, Infer Generic Return Types

Companies: OpenAI

Low-Level Design (OOP) · Parsing & Interpreters

Last reported Sep 2026

Practical engineeringMedium

At-Least-Once Job Queue with Timeouts, Retries, a Dead-Letter Queue and Dependencies

Companies: OpenAI

Data Structure Design · Job Scheduling & Workflows

Last reported Sep 2026

Practical engineeringMedium

Batch Image Resize and Rotate with Pillow: Exact Dimensions, Parallelism, Bad Files

Companies: Anthropic

Concurrency · Fault Tolerance & Failover

Last reported Sep 2026

Practical engineeringMedium

Find Duplicate Files by Content in a Directory Tree and Explain CPU vs I/O Costs

Companies: Anthropic

Operating Systems

Last reported Sep 2026

Practical engineeringMedium

Fix a Buggy LRU Cache, Then Make It Durable with a Write-Ahead Log

Companies: Anthropic

Data Structure Design · Debugging

Last reported Sep 2026