Capital One Data Scientist Statistics & Math Interview Questions
Practice the exact questions companies are asking right now.
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"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."
How do you compute expected return for two projects?
Case: Choose between two TV projects under uncertainty You are evaluating two projects: - Project A: "Analyst" (an existing TV show you can continue i...
Compute Optimal Die Re-roll Strategy
A fair six-sided die pays its face value in dollars. You may roll up to three times total. - After the first or second roll, you may either keep the o...
Compute required output to recover 10% investment
Power Plant Profit Target and Capacity Feasibility Context You are evaluating a fossil-fuel power plant. The plant can sell all electricity it generat...
Calculate profit and break-even across pricing models
Unit Economics and Break-even Analysis for a Cloud-Storage Startup You are analyzing a cloud-storage startup that currently charges unit-based pricing...
Compute credit-card portfolio profit and breakeven
A bank is evaluating a new credit card. Segments: A: 30,000 customers, capture rate 20%, avg annual spend per captured customer = $100,000. B: any pop...
Set membership fee under investment constraints
Streaming membership pricing vs. content investment Context You are designing a monthly membership for a streaming service. Producing original shows i...
Compute expansion profits and expected value
Theme Park Expansion Profit Analysis Context You are evaluating the financial impact of capacity expansion for a theme park. Current operations and pr...
Compute unit economics and insurance break-even
Subscription unit economics and insurance math. Assume no discounting and ignore taxes unless stated. Part A (15-month term): A subscription service c...
Differentiate x^x and analyze domain
Compute the derivative of f(x) = x^x for x > 0 using logarithmic differentiation. State precisely the domain where the derivative is real-valued. Eval...
How to Analyze and Reduce Airline Flight Delays
Scenario Statistics role-play: investigating airline flight delays Task Design and execute a statistical analysis to understand and reduce airline fli...
Compute and interpret 95% confidence intervals
Answer all parts. Show formulas and intermediate values. A) An A/B test measures conversion: Variant A has 410 conversions out of 5000 visitors; Varia...
Differentiate fixed and variable costs with examples
Unit Economics: Fixed vs. Variable Costs in a Subscription Streaming Business Task - Define fixed cost vs. variable cost for a subscription streaming ...
Compute energy needed for 10% ROI
A proposed plant must deliver at least a 10% annual ROI on an initial investment of $400M. Annual economics (assume all numbers are annual unless note...
Evaluate payback and sensitivity for solar vs ethanol pilots
Renewable Pilot Evaluation — Payback and Sensitivity Context Two 1-year-operated pilot plants are being considered to add renewable capacity. Assume s...
Maintain profit margin with new product line
Year 2 volume needed to maintain Year 1 profit margin after adding Vegan line Context - m denotes million dollars. - In Year 2, you add a Vegan burger...
Calculate first-year profit margin
Profit Margin Calculation (Year 1) Context: A single product is sold in Year 1. m denotes million. Given: - Fixed costs: $375m - Units sold (Regular):...
Compute gala vs online break-even donors
A nonprofit must choose one of two fundraising options. Option A (Gala): capacity 100 attendees; fixed cost $20,000; variable cost $100 per attendee. ...
Compute monthly break-even subscribers
Break-even Analysis for a Subscription Streaming Service Context A streaming startup incurs monthly fixed costs and per-subscriber variable costs and ...
Compute break-even and simulate diaper inventory
You operate a cloth-diaper service with these weekly parameters: 350 babies served; charge $20 per baby; deliver 80 clean diapers per baby; average us...
Diagnose and fix a flight-delay modeling setup
Flight Delay Modeling: Binary Target, Features, and Diagnostics You are modeling the probability that a flight arrives with a delay greater than 15 mi...