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VO Apple Interview Experience｜From algorithms to depth of thought, how Apple tests your "underlying understanding".

If Google's interviews are algorithmic speed races, and Amazon's are Leadership principle examinations, then Apple I...

OA Akuna Capital OA Guide (US) | QR / SDE / MLE Question Breakdown & 2026 Online Assessment Trends

Akuna's 2026 OA has recently been sent out, especially for QR, SDE, and MLE, and almost every student has...

VO Roche Data Scientist Interview｜Clinical Data Analysis + ML System Design + Pharma Domain Problem Solving

This time let's talk about the complete experience of interviewing for Data Scientist at Roche. Overall, I think the interview atmosphere at Roche...

VO Visa 26NG OA Review｜70 minutes official time limit, 30 minutes easy to pass in one go (with question analysis)

This time I would like to share a student's Visa 2026 New Grad OA experience. The overall feeling is almost the same as TikTok's question bank...

VO Roche Data Scientist Interview Review｜From clinical data to modeling, a "real-world problem discussion".

I recently helped a schoolmate review her Roche Data Scientist interview. She was actually super nervous - she thought she was going to get all kinds of c...

OA Goldman Sachs OA Interview Review｜Log Buffer + Password Lock, two brain-teasing questions!

Goldman Sachs OA has always been a bit "off the beaten path". Unlike other financial firms that favor mathematical derivation or SQL case...

Two Sigma Quant Researcher OA + interview review｜Probabilistic Decision Making, Expectation Calculation and Geometric Probability Comprehensively Explained

VO Two Sigma Quant Researcher OA + interview review｜Probabilistic Decision Making, Expectation Calculation and Geometric Probability Comprehensively Explained

Two Sigma's Quant Researcher (QR) position has long been known as one of the "IQ Ceiling" positions...

VO Reddit System Design Interview in-depth disassembly: from the feed ranking to the voting system, to help you avoid the pit to get Offer

If you're preparing for an interview for a big systems design job, Reddit is definitely one of your "must-browse" companies. As a globally recognized social news aggregator, R...

VO Quora Interview Questions Technical Interview Detailed review: a "deep interrogation" about AB Test.

I recently passed a technical interview with a Data Scientist at Quora, and it really kind of refreshed my understanding of AB Testing....

OA Confluent's latest OA review｜Two questions of medium-high intensity, full monitoring + detailed explanation of boundary pits

Recently, I just finished Confluent's OA, and the overall feeling is slightly harder than expected, belonging to the kind that looks simple, but with a lot of details and boundaries that are easy to error...

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