Interview questions

How Would You Test Whether Momentum Is a Real Alpha Signal in Stocks?

Companies: Two Sigma

Hypothesis Testing · Portfolio Construction & Alpha Research

How Would You Verify a Smiling-Face Detection Feature in Google Photos?

Companies: Google

Model Evaluation · Testing & Quality

Hybrid AI Rollout: Adding a Model Beside Rule Engines and Human Reviewers

Companies: Stitch

AI Product Management

Identify a classic bagging algorithm

Companies: C3 Ai

Identify and Fix Predictive Model Performance Gaps

Companies: Google

Feature Engineering · Supervised Learning

Identify Fake Accounts Using Machine Learning Techniques

Companies: Meta

Identify Features for Fake News Detection on Facebook

Companies: Meta

Identify Risks and Improve Imputation Class Implementations

Companies: Capital One

Identify top exposures and mitigate

Companies: Wells Fargo

Identify Unsupervised Techniques for Detecting Fraudulent Transactions

Companies: PayPal

Identify What Does Not Fix Vanishing Gradients

Companies: C3 Ai

Neural Networks & Training

Implement 1NN Embeddings and Forward Pass

Companies: Meta

Embeddings & Vector Search · ML Coding

Implement a Decision Tree Classifier and a Bagging Ensemble from Scratch

Companies: Pinterest

ML Coding · Supervised Learning

Implement a k-Nearest Neighbors Classifier from Scratch

Companies: Pinterest

ML Coding · Supervised Learning

Implement a Text-Embedding Recommender Training Pipeline

Companies: LinkedIn

Implement a Transformer Decoder from Scratch Without Starter Code

Companies: ByteDance

ML Coding · Transformers & Attention

Implement and Benchmark Speculative Decoding

Companies: SpaceX

Implement and Tune KNN Classifier

Companies: Qube Research & Technologies

Implement AUC-ROC, softmax, and logistic regression

Companies: TikTok

Implement Batch Gradient Descent for Linear Regression

Companies: Amazon

ML Coding · Regression & Statistical Modeling

Implement Beam Search With Length Normalization

Companies: Sealth

ML Coding