Skip to content

Explore

Questions Companies Concepts Guides Sign in

How it works Questions Companies Concepts Guides Pricing Sample scorecard

Interview questions

Find a company or topic. Read the sources, then practice.

Coding study plans Companies Design mock

Loading the question library…

Practice system design interviews out loud with an AI interviewer, a shared whiteboard and a scorecard for your level.

How it works Questions Concepts Questions by company Comparisons Technologies Guides Cheat sheet Sample scorecard FAQ Use it as an app Sign in Pricing About and how we write Terms and guidelines Privacy Policy Contact

© 2026 SysRound. SysRound is an AI practice tool. The AI interviewer and the AI feedback can be wrong. Use it for your own practice, not to hire people.

Interview questions by company and topic | SysRound

Search questions

CompanyType a name, then choose a company from the suggestions.

Question type

Difficulty

TopicType a topic, then choose one from the suggestions.

95 questions

Showing 51–75

CodingMedium
Track Expiring GPU Credits
Companies: OpenAI
Data Structure Design · Heaps & Priority Queues
Last reported Mar 2026
Open workspace
CodingHard
Implement follow graph with snapshots
Companies: OpenAI
Data Structure Design
Last reported Mar 2026
Open workspace
CodingMedium
Implement Time-Aware GPU Credit Ledger
Companies: OpenAI
Data Structure Design · Heaps & Priority Queues
Last reported Feb 2026
Open workspace

Page 3 of 4

CodingMedium

Implement an in-memory DB with TTL backup/restore

Companies: Anthropic

Data Structure Design

Last reported Feb 2026

System designMedium

Design read-heavy org chart subordinate counts

Companies: Microsoft

Data Structure Design · System Design

Last reported Feb 2026

CodingHard

Design stack with O(1) minimum query

Companies: Anthropic

Data Structure Design · Stacks & Queues

Last reported Feb 2026

CodingMedium

Implement an IPv4 Range Iterator

Companies: OpenAI

Data Structure Design · Intervals & Scheduling

Last reported Jan 2026

CodingHard

Implement a Contiguous Memory Manager

Companies: OpenAI

Data Structure Design · Memory Management

Last reported Jan 2026

CodingMedium

Implement a memory allocator with malloc/free

Companies: OpenAI

Data Structure Design · Memory Management

Last reported Jan 2026

CodingHard

Implement an in-memory SQL-like table

Companies: OpenAI

Data Structure Design

Last reported Dec 2025

CodingHard

Implement credit ledger with out-of-order timestamps

Companies: OpenAI

Data Structure Design

Last reported Dec 2025

System designMedium

Design versioned in-memory key-value store

Companies: Meta

Data Structure Design · System Design

Last reported Nov 2025

Practical engineeringMedium

Design a social network with snapshots

Companies: OpenAI

Data Structure Design · Graphs

Last reported Nov 2025

CodingMedium

Implement IPv4 iterators and CIDR expansion

Companies: OpenAI

Bit Manipulation · Data Structure Design

Last reported Nov 2025

CodingMedium

Design a persistent key-value store

Companies: OpenAI

Data Structure Design

Last reported Sep 2025

CodingMedium

Design an in-memory banking service

Companies: Anthropic

Data Structure Design · Heaps & Priority Queues

Last reported Sep 2025

System designHard

Design an in-memory cloud storage system

Companies: Meta

Data Structure Design · System Design

Last reported Sep 2025

System designHard

Design credit balance with vector-clock expirations

Companies: OpenAI

Data Structure Design · Distributed Coordination

Last reported Sep 2025

CodingMedium

Design high-throughput hashing for kernels

Companies: Anthropic

Data Structure Design · Memory Management

Last reported Sep 2025

CodingMedium

Implement a recency-eviction bounded cache

Companies: Anthropic

Data Structure Design

Last reported Sep 2025

CodingMedium

Implement a Simulated Memory Allocator

Companies: OpenAI

Data Structure Design · Memory Management

Last reported Sep 2025

CodingMedium

Implement an expiring GPU-credit manager

Companies: OpenAI

Data Structure Design · Heaps & Priority Queues

Last reported Sep 2025

CodingMedium

Implement GPU credit ledger

Companies: OpenAI

Data Structure Design · Payments & Ledgers

Last reported Sep 2025

CodingMedium

Implement KV store and plan type conversions

Companies: OpenAI

Data Structure Design · Graphs

Last reported Sep 2025

CodingMedium

Implement Python LRU cache with varargs

Companies: Anthropic

Data Structure Design · Programming Languages

Last reported Sep 2025