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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...

OA JPMorgan OA Interview｜Dynamic Planning + Prefix and Question Summary

JPMorgan's OA has been the focus of many preparations for FinTech posts (FinTech / Quant / Data / SDE...

VO Statsig interview process experience sharing｜Interpretation of telephone interview and four rounds of VO real questions

Statsig is a small startup in Bellevue, but many of the founding team are ex-Meta...

OA Meta Online Assessment Four Questions Full Explanation and Passing Ideas (30 minutes full AC)

This time, Meta's OA is a remote format with four questions, and the platform interface is clean and smooth. Throughout the process, the style of the questions favored basic logic and data structures, no...

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