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
Easy
Data ScientistWrite the logistic regression loss function
Write the logistic regression loss function Logistic Regression Loss Consider binary logistic regression. - Dataset: \(\{(\mathbf{x}_i, y_i)\}_{i=1}^n...
Statistics & Math
10
0
93 people solved
Jul 15, 2025
Medium
Data ScientistInternDesign Rideshare Marketplace Causal Analyses
You are a data scientist at a ride-hailing marketplace. Answer the following case prompts as if you were advising product, operations, and marketplace...
Analytics & Experimentation
2
0
21 people solved
Feb 18, 2026
Medium
Software EngineerSenior+Build a validated add-sub calculator
Given a string expression, write a function that validates and evaluates it. The expression represents arithmetic using only non-negative integers and...
Coding & Algorithms
6
0
45 people solved
Feb 18, 2026
Medium
Backend EngineerExplain project decisions and trade-offs
Pick one project you worked on and walk through the key technical decisions behind it. Why did you choose that architecture, design, or technology sta...
Software Engineering Fundamentals
11
0
102 people solved
Feb 18, 2026
Easy
Data ScientistAnalyze document collaboration from CSV logs
You are given two CSV files exported from a document collaboration product. Data 1) doc_access.csv Each row represents a user accessing (viewing/editi...
Data Manipulation (SQL/Python)
2
0
19 people solved
Feb 17, 2026
Medium
Data ScientistCompare Random Forests and Boosted Trees: Bias, Variance, Speed
Compare Random Forests and Gradient-Boosted Trees You are choosing and configuring tree-based ensemble models for a product-facing data-science proble...
Machine Learning
157
4
233 people solved
Jul 12, 2025
Easy
Data ScientistExplain Central Limit Theorem's Importance in A/B Testing
Explain the Central Limit Theorem's Importance in A/B Testing This statistics prompt asks you to state the Central Limit Theorem, explain why it matte...
Statistics & Math
17
0
70 people solved
Jul 12, 2025
Medium
Data ScientistImplement Infinite Fibonacci Generator Using Lazy Evaluation
Scenario Testing understanding of Python lazy evaluation and generators. Question Explain what lazy evaluation means in Python and implement a generat...
Coding & Algorithms
21
0
47 people solved
Jul 12, 2025
Medium
Data ScientistAnalyze Profit Decline: Data Collection and Hypothesis Testing
Analyze Profit Decline: Data Collection and Hypothesis Testing You manage a coffee shop whose profits have recently declined. You need to diagnose the...
Analytics & Experimentation
16
0
73 people solved
Jul 12, 2025
Medium
Data ScientistAggregate User Activity, Fit Regression, Interpret Coefficients
user_metrics +----------+------------+---------+--------+-----------+ | user_id | activity_dt| variant | clicks | purchases | +----------+-----------...
Data Manipulation (SQL/Python)
102
0
277 people solved
Jul 12, 2025
Hard
Data ScientistDevelop Dynamic-Pricing Algorithm for Lyft Balancing Key Factors
Develop a Dynamic-Pricing Algorithm for Lyft You are tasked with building a dynamic-pricing system for Lyft, a two-sided ride-hailing marketplace. The...
Machine Learning
38
0
169 people solved
Jul 12, 2025
Medium
Data Scientist LockedIdentify Potential Users for Instagram Shopping Tab Adoption
Evaluates how to identify likely adopters of an Instagram Shopping tab and measure whether the feature creates incremental commerce value. Strong answ...
Analytics & Experimentation
34
0
97 people solved
Jul 12, 2025
Medium
Data ScientistDesign an A/B Test for Dashboard Engagement Impact
A/B Test for Energy Dashboard Engagement A product team is launching a redesigned energy-usage dashboard in a consumer app and wants to measure whethe...
Analytics & Experimentation
12
0
50 people solved
Jul 12, 2025
Hard
Software EngineerSenior+Implement User Sessionization From Event Stream
You are building a backend data-processing component that consumes a stream of newline-delimited JSON events. Each event represents a user sending a m...
Coding & Algorithms
2
0
24 people solved
Dec 16, 2025
Easy
Data ScientistDesign metrics and experiment for donation feature
Question Uber Eats is considering a new feature: when a user places an order, they can optionally add a donation (to the merchant or a merchant-select...
Analytics & Experimentation
6
0
65 people solved
Dec 16, 2025
Easy
Software EngineerDesign a crash-resilient file system
Prompt Design a resilient file system that can recover file contents correctly after a system crash (e.g., power loss / kernel panic). The interviewer...
System Design
15
0
310 people solved
Dec 16, 2025
Hard
Software EngineerRemove minimum invalid mixed brackets
Given a string s containing letters and bracket characters from the set (), [], {}, remove the minimum number of bracket characters so that the result...
Coding & Algorithms
7
0
68 people solved
Feb 17, 2026
Medium
Software Engineer LockedImplement Stable Softmax
This question evaluates understanding of numerical stability, floating-point arithmetic, normalization, and probability distributions when computing s...
Coding & Algorithms
1
0
13 people solved
May 3, 2026
Medium
Data Scientist LockedExplain Option Greeks and Futures Pricing
This question evaluates understanding of derivatives and quantitative finance concepts—option Greeks (delta, gamma), PnL approximations, futures prici...
Software Engineering Fundamentals
4
0
41 people solved
May 3, 2026
Medium
Product Analyst LockedHow to evaluate emoji reactions?
This question evaluates product analytics and experimentation competencies for a Product Analyst role in the Analytics & Experimentation domain, focus...
Analytics & Experimentation
2
0
39 people solved
Oct 20, 2025