Interview Questions
Practice the exact questions companies are asking right now.
Questions
10.0k
Companies
520
Updated
08.21.2026
10.0k Questions 520 Companies08.21.2026
PLTCHK
"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"
_The_TaNk_
"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"
ChrisSenior SWE, LinkedIn
"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."
sleepy33
"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."
JakeSenior ML Engineer, Lyft
"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."
nuggetlord
"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."
CarlosFull Stack, Shopify
"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."
boba.tea.vibes
"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."
AndySWE-II, Google
"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."
couchpotato99
"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."
ShrutiData Engineer, Salesforce
"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."
midnightramen
"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."
BiancaFrontend Eng, Figma
"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."
tambrahm007
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
toa
"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."
Showing 20 results
Role
Medium
Data ScientistNavigate conflicting signals and ambiguous expectations
Behavioral & Leadership Onsite: Changing Expectations, Stakeholder Pushback, Preparation Strategy, and Learning Plan Context You are interviewing for ...
Behavioral & Leadership
16
0
169 people solved
Oct 13, 2025
Medium
Data ScientistDetail NLP preprocessing and n‑gram choices
Describe your text preprocessing pipeline given the source modality: typed text, scanned/handwritten OCR, or speech-to-text. Specify language handling...
Machine Learning
9
0
78 people solved
Oct 13, 2025
Hard
Data ScientistDiagnose 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...
Statistics & Math
13
0
108 people solved
Oct 13, 2025
Hard
Data ScientistDiagnose a sudden metric spike or drop
Investigate a 3-Day Jump in Checkout Conversion Rate (CCR) Context On 2025-06-12, the daily Checkout Conversion Rate (CCR) increased from 3.2% to 4.5%...
Analytics & Experimentation
9
0
129 people solved
Oct 13, 2025
Medium
Data ScientistExplain life-story choices and pre-read insights
HR Screen Pre‑read and Life Story Exercise (Data Scientist) Context You receive a 6‑page HR pre‑read 24 hours before a 60‑minute "Life Story" intervie...
Behavioral & Leadership
7
0
99 people solved
Oct 13, 2025
Easy
Data ScientistInfer and justify non-trivial sequence patterns
Pattern Recognition: Next Terms and Missing Value Identify the rule governing each sequence or row and compute the missing value(s). Justify each answ...
Coding & Algorithms
15
1
130 people solved
Oct 13, 2025
Medium
Data Scientist LockedTune classifier and compute key metrics
This question evaluates practical proficiency in classifier evaluation, threshold tuning, precision/recall trade-offs, cost-sensitive decision rules, ...
Machine Learning
9
0
81 people solved
Oct 13, 2025
Medium
Data ScientistChoose threshold under costs and uncertainty
Incentive Targeting: Threshold Selection, Uncertainty, Calibration, and Drift Context: You deploy a model that sends an incentive to predicted positiv...
Statistics & Math
2
0
30 people solved
Oct 13, 2025
Hard
Data ScientistDesign rigorous A/B test and causal analysis
Experiment Design and Causal Inference: Multi-part Problem Context: You are designing a high-traffic web A/B test on a binary conversion metric. Answe...
Statistics & Math
16
0
150 people solved
Oct 13, 2025
Hard
Data ScientistLead XFN decision under tight timeline
Scenario: 72-Hour VP-Level Recommendation on Expanding a New Quoting Workflow You have 72 hours to deliver a VP-level deck recommending whether to exp...
Behavioral & Leadership
11
0
97 people solved
Oct 13, 2025
Hard
Data Scientist LockedAnalyze A/B test with rigorous diagnostics
This question evaluates a data scientist's competency in experimental design and rigorous A/B test analysis, including covariate balance checks, prima...
Analytics & Experimentation
11
0
180 people solved
Oct 13, 2025
Medium
Data ScientistCompute sample size and analyze A/B results
A/B Test: Sample Size, Sequential Correction, and Post-Experiment Analysis Context You are planning a two-arm A/B test with a binary (Bernoulli) conve...
Statistics & Math
9
0
89 people solved
Oct 13, 2025
Medium
Data ScientistFind duplicates in a list efficiently
Given a Python list that can contain integers (possibly negative) and may be very large, write code and explain approaches to find all values that app...
Coding & Algorithms
19
0
186 people solved
Oct 13, 2025
Hard
Data ScientistDesign an experiment for order batching
Experiment Design: Two-Order Batching Policy During Peak Hours Context DoorDash plans to test a dispatch policy that allows a dasher to pick up two ne...
Analytics & Experimentation
12
0
170 people solved
Oct 13, 2025
Medium
Data ScientistCompute Markov steady state and expectations
Compute Markov steady state and expectations Probability and Game Theory: Three Sub-questions Context: The exact transition matrix P (for Q1) and the ...
Statistics & Math
8
0
81 people solved
Jul 28, 2025
Hard
Data ScientistInternEvaluate and safely deploy a CVR model online
You have built a new CVR (conversion rate) prediction model for an RTB bidding system at a DSP. Offline metrics improved (e.g., lower log loss and hig...
Analytics & Experimentation
4
0
49 people solved
Dec 10, 2025
Medium
Frontend EngineerNew Grad LockedBuild a React dashboard with filters
This question evaluates frontend engineering skills in React, including component decomposition, controlled inputs and state management, semantic HTML...
Software Engineering Fundamentals
1
0
37 people solved
Jan 10, 2026
Medium
Machine Learning Engineer LockedExplain core ML fundamentals and tradeoffs
This question evaluates core machine learning fundamentals including bias–variance tradeoffs, overfitting, class imbalance handling, loss function sel...
Machine Learning
8
0
89 people solved
Jan 10, 2026
Hard
Software EngineerFilter People by Optional Criteria
Filter People by Optional Criteria Implement filter_people(people, min_age, max_age, occupations, min_salary, max_salary). Each item in people is a di...
Coding & Algorithms
0
0
12 people solved
Apr 30, 2026
Medium
Software EngineerLinux Host and Filesystem Fundamentals
Linux Host and Filesystem Fundamentals Clarifying Questions to Ask - Which Linux distribution and shell should be assumed? - Are privileged commands a...
Software Engineering Fundamentals
1
0
17 people solved
Apr 30, 2026