Walmart Data Scientist interview questions

“I went with a professional story but it felt a bit sanitized in hindsight.” The rest of the author's notes on Data Scientist interview at Walmart, Hiring Manager Screen round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“The median part is what got me.” The rest of the author's notes on Data Scientist interview at Walmart, Online Assessment (OA) round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“I knew the general answer but fumbled the vocabulary under pressure.” The rest of the author's notes on Data Scientist interview at Walmart, Technical Phone Screen round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“I walked through the mechanics fine, splitting data into k folds, training on k-1, testing on the held-out one, rotating through.” The rest of the author's notes on Data Scientist interview at Walmart, Technical Phone Screen round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“I talked through a few modeling options and landed on using lagged features from prior periods.” The rest of the author's notes on Data Scientist interview at Walmart, Technical Phone Screen round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“I knew the textbook definition but stumbled when they pushed for concrete business scenarios.” The rest of the author's notes on Data Scientist interview at Walmart, Technical Phone Screen round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“This was the whole interview, not just one question.” The rest of the author's notes on Data Scientist interview at Walmart, Onsite - System Design / Architecture round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“The structure trips you up for a second because it's not a normal dict-of-lists you can just throw at pd.DataFrame().” The rest of the author's notes on Data Scientist interview at Walmart, Technical Phone Screen round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“I knew the surface-level answer but fumbled when they pushed on the interaction between temperature and top-p.” The rest of the author's notes on Data Scientist interview at Walmart, Technical Phone Screen round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.

“Two passes: count frequencies first, then scan again for the first count-of-one character.” The rest of the author's notes on Data Scientist interview at Walmart, Technical Phone Screen round, covers how they worked through the question, what the panel pushed back on, and what they would do differently.