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PDT Partners interview questions

2 practice questions in the style of PDT Partners's interviews, covering Coding & Algorithms, Machine Learning.

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PDT Partners interview questions by the numbers

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Katkat has 2 PDT Partners interview questions. The largest topics are Coding & Algorithms (50%) and Machine Learning (50%). By difficulty: 100% medium. The most common round is Technical Screen (100%).

Topics

Difficulty

  • Medium100% · 2

Interview rounds

  • Technical Screen100% · 2

Roles

  • Machine Learning Engineer100% · 2

Showing 1–2 of 2 results

  • List All Positive Divisors of an Integer in Ascending Order, Then Beat Square-Root TimeMedium

    Given a positive integer up to one trillion, return every positive divisor in ascending order, each listed once. The task tests divisor enumeration, correct handling of perfect squares and 64-bit values, and a follow-up asking whether the running time can grow more slowly than the square root of n.

    PDT PartnersMachine Learning EngineerCoding & AlgorithmsTechnical Screen
  • Project Deep Dive: Low-Latency LSTM Inference at Scale and the LSTM vs Transformer ChoiceMedium

    A project deep dive on a small LSTM model served for large-scale, latency-sensitive inference. The candidate must explain the deployment hardware, latency requirement and use case, how inference latency was reduced, why an LSTM was chosen over a Transformer, and whether that choice still holds today.

    PDT PartnersMachine Learning EngineerMachine LearningTechnical Screen

PDT Partners interview experiences

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  • Project Deep Dive, Then a Find-Divisors Follow-upPDT Partners · Machine Learning Engineer · Technical Screen · Aug 2026
    Withdrew

    I interviewed with Citadel Securities (see my previous post) and PDT back to back. I originally wanted to post both back to back too, but something came up and I got delayed. The PDT team is different from the Citadel one. The link they sent was for a research engineer role, but both the headhunter and HR said it would be an LLM team, and it was hybrid 3 days a week, so I was really excited. But…

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