10 Recent OpenAI Interview Practice Questions

Here are 10 OpenAI-tagged full-time interview practice records last seen between July 23 and August 7. I selected a mix of patterns instead of including every close variant.

1. Sparse Plant Infection Simulation

Hard | Phone screen / onsite | Simulation | Last seen Aug 7

https://www.fastprep.io/problems/openai-plant-infection-simulation

2. Versioned Snapshot Set

Medium | Phone screen | Design | Last seen Aug 7

https://www.fastprep.io/problems/openai-versioned-snapshot-set

3. Versioned Friend Recommendations

Hard | Phone screen | Graph | Last seen Aug 5

https://www.fastprep.io/problems/openai-versioned-friend-recommendations

4. 15-Minute Chat Session Tracker

Hard | Onsite | Hash table | Last seen Jul 31

https://www.fastprep.io/problems/openai-session-tracker-15-minute

5. Tensor-Parallel MLP Gradients

Hard | Onsite | Array | Last seen Jul 31

https://www.fastprep.io/problems/openai-tensor-parallel-mlp-gradients

6. GPU Credit Ledger

Hard | Phone screen / onsite | Design | Last seen Jul 29

https://www.fastprep.io/problems/openai-gpu-credit-ledger

7. Segmented Durable Key-Value Store

Medium | Phone screen | Design | Last seen Jul 28

https://www.fastprep.io/problems/openai-segmented-durable-key-value-store

8. Streaming Entropy, Part 1: Batch Entropy

Easy | Phone screen / onsite | Array | Last seen Jul 25

https://www.fastprep.io/problems/openai-streaming-entropy-part-1

9. Prefix Matrix Products and Autograd

Hard | Phone screen | Matrix | Last seen Jul 25

https://www.fastprep.io/problems/openai-prefix-matrix-products-autograd

10. Memory Allocator

Medium | Phone screen | Design | Last seen Jul 23

https://www.fastprep.io/problems/openai-memory-allocator

A practical way to use the list: do one stateful-design problem, one sparse-simulation problem, and one numerical array/matrix problem before attempting close variants.

These are our practice formulations linked to reported/catalogued sightings—not an official OpenAI question list and not a prediction of what any candidate will receive. The stage, difficulty, and last-seen fields come from the FastPrep catalog.

Disclosure: I work on FastPrep; the links above are our practice pages.

Which of these patterns is hardest to practice well from a prompt alone: stateful design, sparse simulation, or numerical arrays?