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 ScientistChoose best/worst actions under OA pressure
Behavioral Scenario: Time-Boxed OA With Hidden Test Failure Context You are a data scientist candidate 70 minutes into a 90-minute online assessment (...
Behavioral & Leadership
4
0
85 people solved
Oct 13, 2025
Medium
Data ScientistImplement streaming SRM detector with late events
Implement a streaming detector for sample ratio mismatch (SRM) across many concurrent experiments. Input is two topic-partitioned streams: assignments...
Coding & Algorithms
3
0
68 people solved
Oct 13, 2025
Hard
Data ScientistCommunicate and de-risk a non-experimental launch
Decision-to-Launch Plan After a Synthetic Control Result Context You are a data scientist who used a Synthetic Control method to estimate the causal i...
Behavioral & Leadership
6
0
92 people solved
Oct 13, 2025
Hard
Data ScientistPrevent data registration outage and reduce loss
Preventing Silent Failures in the Premium Registration Pipeline Context A premium registration pipeline silently failed for three months, causing thou...
Behavioral & Leadership
5
0
60 people solved
Oct 13, 2025
Medium
Data ScientistTest regional response-rate differences rigorously
Goal Assess whether provider response rates differ by region after adjusting for job category mix and time. Data You have job-level observations with ...
Statistics & Math
11
0
83 people solved
Oct 13, 2025
Hard
Data ScientistDesign robust A/B test with interference and seasonality
Experiment Design: Redesigned Onboarding with Network Effects and Weekly Seasonality Background You are launching a redesigned onboarding flow for a c...
Analytics & Experimentation
11
0
103 people solved
Oct 13, 2025
Hard
Data ScientistInfluence policy with BI deliverables
BI/Fraud Stakeholder Case: Drive an Account Takeover (ATO) Policy Change in 90 Days You join the Chicago Fraud team as a Decision Scientist. The hirin...
Behavioral & Leadership
5
0
84 people solved
Oct 13, 2025
Easy
Software EngineerDesign a Multimodal Training Data Pipeline
Design a backend system for collecting, filtering, and storing training data sent by many clients. Clients upload records that may include large media...
ML System Design
3
0
36 people solved
Apr 2, 2026
Medium
Data Scientist LockedImplement Buffer Parsers and Generic Map Class
This question evaluates proficiency in low-level C++ buffer parsing, memory and pointer management, safe binary deserialization, and template-based ge...
Coding & Algorithms
2
0
45 people solved
Apr 2, 2026
Easy
Data Scientist LockedTest whether US uploads more videos
This question evaluates a data scientist's competency in observational analytics, metric definition, confounder identification and control, and statis...
Analytics & Experimentation
11
0
88 people solved
Feb 21, 2026
Medium
Software EngineerImplement a Level-Aware Expiring Inventory Store
Implement an inventory store with levels, weights, timestamps, and expiration. store adds an item. retrieve(timestamp) returns and removes the highest...
Coding & Algorithms
2
0
20 people solved
Feb 3, 2026
Medium
Software EngineerSenior+Design Food Ratings and Driver Payouts
Design the backend for a food-delivery product (think DoorDash-style marketplace). The system has two distinct surfaces that you must address together...
System Design
62
0
432 people solved
Feb 3, 2026
Medium
Data ScientistExplain Encapsulation, Inheritance, and Polymorphism in C++
Explain Encapsulation, Inheritance, and Polymorphism in C++ Explain encapsulation, inheritance, and polymorphism in C++ by designing a small hierarchy...
Software Engineering Fundamentals
1
0
11 people solved
Dec 14, 2025
Medium
Software EngineerCompute probability two arrivals meet within 15 minutes
Probability puzzle Two people plan to meet, but they arrive independently at a random time within the next 1 hour. - Person A’s arrival time is unifor...
Software Engineering Fundamentals
9
0
99 people solved
Dec 14, 2025
Medium
Software EngineerDesign a chatbot (system design)
Question Design an AI chatbot system with a front-end focus, under the following hard constraints: 1. User messages and conversation history are store...
ML System Design
18
0
282 people solved
Aug 4, 2025
Medium
Software EngineerImplement CIDR firewall matcher
Implement CIDR firewall matcher Firewall Rule Matcher for IPv4 CIDR Rules Context and Assumptions You are to design and implement a firewall rule matc...
System Design
57
0
314 people solved
Aug 4, 2025
Hard
Software Engineer LockedImplement a Time-Aware Task Manager
This question evaluates the ability to design and implement in-memory data structures and algorithms for time-aware state management, including per-us...
Coding & Algorithms
6
0
34 people solved
May 17, 2026
Medium
Software EngineerMaximize Chef Assignment Profit
You are given three integer arrays: - chefSkill[i]: the skill level of the i-th chef. - dishDifficulty[j]: the difficulty level required to cook the j...
Coding & Algorithms
2
0
21 people solved
Apr 23, 2026
Hard
Data Scientist LockedMeasure free-month promotion impact
This question evaluates causal inference and experimentation skills, including randomized design and estimand framing, metric and ROI attribution, han...
Analytics & Experimentation
16
0
143 people solved
Jan 15, 2026
Medium
Data ScientistInternDescribe past project experience clearly
You are interviewing for a Data Scientist Intern role in an asynchronous video interview format. Prepare concise, structured responses to the followin...
Behavioral & Leadership
5
0
52 people solved
Apr 1, 2026