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 Scientist LockedInvestigate Falling Brand-Ad Spend
This question evaluates competency in data analysis, anomaly detection, causal inference, and diagnostic reasoning related to advertising performance,...
Analytics & Experimentation
2
0
55 people solved
Mar 12, 2026
Medium
Data Scientist LockedWrite SQL for CTR and Revenue
This question evaluates proficiency in SQL-based data manipulation and analytics, focusing on joins across event and reference tables, time-of-day buc...
Data Manipulation (SQL/Python)
13
1
92 people solved
Mar 12, 2026
Medium
Software EngineerImplement a calendar with non-overlapping bookings
Problem Design a calendar booking system that stores half-open time intervals [start, end) (inclusive of start, exclusive of end). Implement a class w...
Coding & Algorithms
13
1
91 people solved
Nov 25, 2025
Medium
Software EngineerMaximize Earnings by Converting Days Off into Workdays
Maximize Earnings by Converting Days Off into Workdays An employee is planning a work schedule for n consecutive days. For day i you are given whether...
Coding & Algorithms
1
0
10 people solved
Mar 11, 2026
Medium
Software Engineer LockedImplement Sliding-Window Rate Limiter
This question evaluates understanding of time-based sliding-window rate limiting, per-user quota enforcement, efficient in-memory data structures for ...
Coding & Algorithms
4
0
29 people solved
Mar 11, 2026
Medium
Data ScientistDescribe a high-impact product project
In a conversation with a Head of Product, you are asked to discuss one project in depth. Describe a product or marketplace project where you had meani...
Behavioral & Leadership
6
0
75 people solved
Mar 11, 2026
Easy
Software EngineerCheck connectivity between two subway stations
You are given a description of subway stations A, B, C, D, E, ... as a graph. For each station, you are told which other stations it directly connects...
Coding & Algorithms
15
1
146 people solved
Mar 11, 2026
Easy
Software EngineerMinimize travel cost with two cities
You are scheduling candidates to attend an onsite interview. Each candidate i can fly to New York for cost c1[i] or to San Francisco for cost c2[i]. C...
Coding & Algorithms
16
2
124 people solved
Mar 11, 2026
Medium
Machine Learning EngineerInternBoard Simulation: Bottom-Insert Pieces with Uniform Row and Column Detection
Board Simulation: Bottom-Insert Pieces with Uniform Row and Column Detection You must simulate a 2-D game board with R rows and C columns. Each cell i...
Coding & Algorithms
1
0
20 people solved
Aug 27, 2025
Hard
Data ScientistApply Bayes' rule to compute posterior
A binary event \(A\) (e.g., “user is a payer” or “patient has a disease”) has prior probability \(P(A)\). You observe evidence \(B\) (e.g., a model pr...
Statistics & Math
7
0
100 people solved
Nov 24, 2025
Hard
Data ScientistNormalize features and rank logistic coefficients
You are given a binary classification training dataset: - X: a 2D array of shape (n_samples, n_features) containing numeric features. - feature_names:...
Machine Learning
11
0
84 people solved
Nov 24, 2025
Easy
Data ScientistNew GradExplain KNN and PCA and key tradeoffs
In a Data Scientist internship interview, you are asked ML fundamentals: 1) K-Nearest Neighbors (KNN) - Explain how KNN works for classification and r...
Machine Learning
5
0
73 people solved
Nov 24, 2025
Hard
Software EngineerDescribe leading an end-to-end client project
You are in a behavioral interview for a software engineering role. The interviewer asks you to discuss a full‑stack project you led end‑to‑end for a r...
Behavioral & Leadership
4
0
77 people solved
Nov 24, 2025
Easy
Software EngineerDesign a URL shortener
Design a URL shortening service similar to Bitly. The service should accept a long URL and return a short alias, and visiting the short URL should red...
System Design
21
0
143 people solved
Mar 10, 2026
Easy
Software EngineerDescribe a proud project and conflict
In a behavioral interview, be prepared to discuss your previous work experience, one project you are especially proud of, and a time you had a conflic...
Behavioral & Leadership
5
0
69 people solved
Mar 10, 2026
Hard
Data Scientist LockedHow would you test product changes?
This question evaluates experimental-design and analytics competencies—specifically A/B testing, causal inference, metric selection, segmentation, pow...
Analytics & Experimentation
32
0
241 people solved
Mar 10, 2026
Medium
Machine Learning EngineerExplain attention variants and their tradeoffs
You are asked to explain and reason about modern Transformer attention mechanisms. 1) Scaled dot-product attention - Define the operation mathematical...
Machine Learning
3
0
72 people solved
Mar 10, 2026
Hard
Data ScientistInternCompute sample size and Bayes posterior
You are implementing two small statistical utilities. Part A — Power / sample size (two-sample z-test) - Input: - x: a 1D numeric array of historica...
Statistics & Math
6
0
59 people solved
Nov 23, 2025
Easy
Data ScientistCompute expected arc length on a circle
On the unit circle (radius \(1\), centered at the origin), pick three points independently and uniformly at random on the circumference. These three p...
Statistics & Math
6
0
84 people solved
Nov 22, 2025
Easy
Data Scientist LockedAnalyze distribution of a 3-dice product
This question evaluates probability and statistical inference skills including computation of expectation, properties of discrete order statistics (po...
Statistics & Math
8
0
58 people solved
Nov 22, 2025