53 practice questions for OpenAI QA Engineer interviews
OpenAI QA engineer interviews test automation frameworks, test strategy, CI integration, performance testing, and debugging complex multi-service systems.
Category: Tree coding problemYou are given a tree-structured network of machines where each node represents a machine. Machines can only communicate with their parent and...Input: String Output: Computed result
codingMediumVerified Question#2
2. Implement cd Command
Category: Algorithm coding problemImplement a simplified version of the Unix cd command. Given a current directory path and a relative destination path, return the final absolute...Input: Given input Output: Computed result
codingMediumVerified Question#3
3. Largest Subgrid
Category: Grid/matrix coding problemYou are given a 2D grid of non-negative integers and a maximum sum constraint. Find the largest size of a square sub-grid such that all...Input: 2D grid Output: Integer
codingHardVerified Question#4
4. Memory Allocator
Category: Linked list coding problem# Memory Allocator Design a memory allocator that manages a contiguous block of memory. Implement malloc and free operations with efficient...Input: Linked list Output: Computed result
codingHardVerified Question#5
5. Toy Language Type Inference
Category: String coding problemImplement a type system for a toy programming language that supports primitives, tuples, and generics. Your task is to represent types and infer...Input: List Output: Computed result
codingMediumVerified Question#6
6. Virus Spread
Category: Grid/matrix coding problemSimulate the spread of a virus through a grid. Each cell can be in one of three states: healthy, infected, or immune. *This is similar to a leetcode...Input: 2D grid Output: Integer
codingMediumVerified Question#7
7. Bot-Enabled Messaging System
Category: String coding problemYou are building a chat system that supports human users and automated bots. Messages are added to a channel log and may trigger bot responses. The...Input: List Output: Computed result
codingHardVerified Question#8
8. Connection Tracker
Category: Algorithm coding problemDesign a social network system that tracks follow relationships between users and preserves a full history through snapshots. The system allows...Input: List Output: Computed result
codingMediumVerified Question#9
9. GPU Credit Ledger
Category: String coding problemYou are designing a system to manage GPU credits. Each credit grant is valid during a specific time window. Events may arrive out of chronological...Input: String Output: Computed result
codingMediumVerified Question#10
10. GPU Credit Manager
Category: String coding problemYou are designing a system to manage GPU credits. Each credit grant is valid during a specific time window. Events may arrive out of chronological...Input: String Output: Computed result
codingHardVerified Question#11
11. In-Memory SQL Engine
Category: String coding problemDesign an in-memory SQL database that supports creating tables, inserting rows with automatic type inference, and querying with filtering and sorting.Input: List Output: Computed result
codingHardVerified Question#12
12. Persistent Key-Value Store
Category: Trie-based coding problemYou are designing a persistent key-value store that serializes its state to a binary storage medium. Native serialization (e.g., JSON, pickle,...Input: Array Output: Computed result
codingHardVerified Question#13
13. Shard Rebalancer
Category: String coding problemYou are implementing a shard management system for a distributed key-value store. Each shard is identified by a string and covers a contiguous range...Input: String Output: Computed result
codingHardVerified Question#14
14. IP Address Iterator
Category: String coding problemEvery device on the public internet is identified by an IPv4 address written in dotted-decimal notation as "A.B.C.D", where each octet is an...Input: String Output: Computed result
codingMediumVerified Question#15
15. Version Support Finder
Category: Binary search coding problemA software company maintains a sorted list of version strings in ascending chronological order. A critical feature was introduced in one version, and...Input: List Output: Computed result
codingMediumVerified Question#16
16. Monster Battle Simulator
Category: String coding problemSimulate a deterministic, turn-based battle between two ordered teams of monsters. Execute the fight step by step and produce a chronological battle...Input: List Output: Computed result
codingMediumVerified Question#17
17. Distributed Tree Messaging
Category: Tree coding problemYou are implementing a message-passing protocol for a distributed system organized as a rooted n-ary tree. Each node represents a machine and...Input: List Output: Printed output
codingHardconcurrency#1
1. [OA] Test Framework Optimization — Optimize the execution of automated tests across various OpenAI models
In many cases, OpenAI implements extensive automated testing to ensure model performance and reliability. However, executing all tests sequentially can increase deployment times significantly. Problem statement: You need to write a method that optimally executes a list of tests in parallel, utilizing available resources efficiently. The function should manage limits on concurrent executions based on a given resource cap. - def parallel_test_execution(tests: List[str], max_concurrent: int) -> List[str]: returns a list of test results in the order of their execution.Example 1: Input: tests = ['test1', 'test2', 'test3', 'test4'], max_concurrent = 2 Output: ['test1_result', 'test2_result', 'test3_result', 'test4_result'] Explanation: Tests are executed concurrently up to two at a time.Example 2: Input: tests = ['test1', 'test2', 'test3'], max_concurrent = 1 Output: ['test1_result', 'test2_result', 'test3_result'] Explanation: Only one test runs at a time.Constraints: - 1 <= len(tests) <= 100 - 1 <= max_concurrent <= len(tests)