Upstart Interview Questions
Practice 69 real Upstart interview questions for 2026 — Upstart interview questions drawn from actual interviews with detailed solutions for focused interview preparation. This collection leans heavy on coding and algorithm problems while also covering Statistics & Math, Machine Learning, Analytics & Experimentation, and Behavioral & Leadership so you can practice the exact question mix candidates see. Software Engineer and Data Scientist roles are both represented, with Software Engineer listed first for readers prioritizing coding prep. For Data Scientists expect a strong emphasis on probability and estimation puzzles (one‑child household probability, classic probability mini‑problems), causal inference and experiment-design questions (measuring impact, estimating effects without randomized tests), algorithmic simulations and implementations (decay simulations, trailing‑zero counts, random‑walk correlations), and applied modeling topics like regularization and OLS. For Software Engineers expect OA-style coding, string and decoding puzzles, small algorithmic challenges, and capacity/revenue modeling. Best prep is practice-driven: time yourself on medium-to-hard coding problems, rehearse statistics and causal reasoning with pen-and-paper derivations, implement simulations end-to-end, and prepare concise behavioral STAR stories tied to product and impact.
"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"
"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"
"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."
"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."
"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."
"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."
"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."
"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."
"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."
"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."
"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."
"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."
"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."
Find the Minimum Absolute Difference
Find the Minimum Absolute Difference Implement minimum_absolute_difference(values). Given at least two integers, return the smallest absolute differen...
Sum Multiples of Three, Five, or Seven
Sum Multiples of Three, Five, or Seven Implement sum_multiples(limit). Return the sum of all distinct positive integers strictly less than limit that ...
Count Words in Lexicographic Order
Count Words in Lexicographic Order Implement word_counts(words) for a list of lowercase words. Return a list of (word, count) pairs sorted in ascendin...
Add Dramatic Punctuation to Text
Add Dramatic Punctuation to Text Implement add_drama(text). Preserve all whitespace exactly. For each maximal non-whitespace token, first replace ever...
Solve Five OA Coding Tasks
This is an online-assessment screen consisting of five independent coding tasks. Each task is self-contained — there is no shared state between them —...
Correct length-biased sampling from family-size survey
In a town, you visit a school and ask 100 kids: “How many children are in your family?” You observe: - 50 kids say their family has 1 child - 20 kids ...
Scale Ingredient Quantities
Scale Ingredient Quantities Each ingredient is a string in the exact format "<quantity> <unit> <name>". Multiply every quantity by servings and return...
Compute decay, OLS, and classic probability results
You are asked several probability/statistics questions. 1) Radioactive decay (half-life) A radioactive atom has a half-life of 1 day. Assume each atom...
Implement four string-processing functions
This question evaluates string-processing and list-manipulation skills, including character membership testing and sequence filtering, reflecting comp...
Combine noisy thermometers; compute random-walk correlations
Problem 1: Estimating a true temperature from noisy thermometers Assume the true (fixed) temperature is an unknown constant \(\theta\). 1a) One thermo...
Rewrite Sentence-Ending Punctuation
Rewrite Sentence-Ending Punctuation Transform a string in two conceptual steps: 1. Add one extra exclamation mark to every maximal run of existing ! c...
Analyze HT vs HH stopping-time probabilities
Coin-Flip Stopping Game: HT vs HH You repeatedly flip a coin until either the pattern HT appears (Player A wins) or the pattern HH appears (Player B w...
Solve core probability/statistics mini-problems
Answer the following probability/statistics interview questions. Assume all randomness is independent unless stated otherwise. 1) Radioactive decay (h...
Find Maximum Eastbound City Visits and Parse CSV
The first problem evaluates algorithmic reasoning about ordering constraints and subsequence selection, testing skills in sequence algorithms, multidi...
Solve drunk-passenger probability and simulate outcome
Lost Boarding Pass Puzzle: Last Passenger's Seat Context: Technical screen for a Data Scientist (Statistics & Math). Setup - There are n passengers la...
Estimate impact without experiments and pick variant
Part A — Measuring impact when you cannot run an experiment You are a Staff Data Scientist working on a product change (feature/policy/model update). ...
Solve Reported OA Coding Problems
The post describes several algorithm questions from an online assessment. The concrete problems that can be reconstructed are: 1. Remove Blocks in a G...
Calculate Expected Streaks in Coin Toss Sequence
Calculate Expected Streaks in Coin Toss Sequence Expected Number of Streaks in Coin Tosses Scenario You toss a coin repeatedly. A "streak" (a run) beg...
Implement decay simulation and trailing-zero counting
Implement the following in Python: 1) Radioactive decay simulation: Half-life is 1 day. Write a simulation function that takes: - input: integer m ...
Derive logistic regression objective and gradients
Context: Binary Logistic Regression You are given a binary classification dataset {(x_i, y_i)}_{i=1}^m with labels y_i ∈ {0, 1}. The model uses the si...