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 ScientistSenior+How would you use propensity score matching here
You want to estimate the causal effect of a new recommender feature on 7-day retention. The feature was not randomized: users “opt in” after seeing a ...
Analytics & Experimentation
20
0
162 people solved
Nov 24, 2025
Hard
Machine Learning EngineerPredict future time-series values
Predict future time-series values End-to-End Time-Series Forecasting (PyTorch) Context You are given one or more regularly sampled numeric time series...
ML System Design
25
0
269 people solved
Aug 4, 2025
Hard
Software EngineerDesign loan application system
Design an End-to-End Loan Application Platform You are a software engineer at a small lending startup. Design a scalable, compliant loan origination s...
System Design
66
0
465 people solved
Aug 4, 2025
Hard
Data ScientistDesign a System to Recommend Local Restaurant Profiles
Design a System to Recommend Local Restaurant Profiles Recommending Local Restaurant Pages in the News Feed Context Design a non-ads recommendation sy...
Machine Learning
4
0
65 people solved
Aug 4, 2025
Hard
Software Engineer LockedDesign a High-Availability Load Balancer
This question evaluates knowledge of distributed systems and load balancing principles, covering high-availability architecture for HTTP/HTTPS traffic...
System Design
19
0
187 people solved
May 9, 2026
Medium
Software Engineer LockedImplement Price-Time Order Matching
This question evaluates understanding of limit-order book mechanics, priority-based matching, stateful stream processing, and data-structure managemen...
Coding & Algorithms
6
0
36 people solved
May 9, 2026
Medium
Software Engineer LockedImplement Social Follow Recommendations
This question evaluates graph data structure design and traversal, set-based aggregation and ranking logic, and the ability to justify data structure ...
Coding & Algorithms
7
0
50 people solved
May 9, 2026
Hard
Data ScientistAnalyze homepage drop and feed ranking
You are interviewing for a product data science role at LinkedIn. Answer the following two product-sense questions. 1. Diagnose a drop in Home Page ->...
Analytics & Experimentation
5
0
67 people solved
Jan 17, 2026
Easy
Data ScientistDesign a lead-scoring model
Question You are interviewing for a Data Scientist role on a marketing/growth team. Sales has limited outreach capacity, so the business wants a lead-...
Machine Learning
28
0
195 people solved
Jan 17, 2026
Easy
Data ScientistExplain KNN and how to tune it
K-Nearest Neighbors (KNN) fundamentals You are interviewing for a Data Scientist role. 1. Explain how the KNN algorithm works for both classification ...
Machine Learning
40
0
385 people solved
Jan 17, 2026
Hard
Software EngineerNew GradImplement streaming RLE and bit-packed codec
You are implementing a simple compression scheme for sequences of 32‑bit signed integers. The codec should support two encoding strategies: 1. Run‑Len...
Coding & Algorithms
51
0
684 people solved
Dec 10, 2025
Medium
Data ScientistDesign Product Notification and Autocomplete Experiments
You are interviewing for a Product Data Scientist role at Discord. Answer both product experimentation case studies below. Case 1: Subscription notifi...
Analytics & Experimentation
5
0
84 people solved
Jan 16, 2026
Medium
Product AnalystHow would you drive product growth?
Assume you are interviewing for a Product Growth Analyst role at Meta. Answer the following product growth and analytics cases. For each case, clarify...
Analytics & Experimentation
5
0
80 people solved
Jan 16, 2026
Hard
Software EngineerDesign viewport dedup for Netflix home page
Design viewport dedup for Netflix home page Design the Above-the-Fold Deduplicated Home Page Rendering Context You are designing the initial viewport ...
System Design
31
0
316 people solved
Aug 1, 2025
Hard
Software EngineerDesign real-time driver heatmap system
System Design: Real-Time Driver Heatmap and Top-K Hottest Cells Context You are building a real-time driver heatmap for a ride-hailing platform that v...
System Design
88
0
956 people solved
Aug 1, 2025
Hard
Software EngineerDesign ads frequency capping service
Design an Ads Frequency Capping Service Context You are designing a service that ensures a user does not see the same ad creative or campaign more tha...
System Design
38
0
588 people solved
Jul 17, 2025
Medium
Software EngineerImplement Recursive React JSON Viewer with Collapse
Implement Recursive React JSON Viewer with Collapse React JSON Tree Viewer (Read-Only, Recursive) Design and implement a React component that accepts ...
Software Engineering Fundamentals
46
0
317 people solved
Jul 17, 2025
Hard
Software EngineerDesign flight-price search service
Design flight-price search service System Design: Cheapest Flight Search Across Multiple Providers Context Design a backend system that searches multi...
System Design
19
0
185 people solved
Jul 17, 2025
Medium
Software Engineer LockedSolve Flower Placement and Directory Deletion
This question evaluates combinatorial constraint-satisfaction and permutation/matching skills for the flower-placement grid alongside filesystem trave...
Coding & Algorithms
5
0
59 people solved
May 8, 2026
Medium
Machine Learning EngineerSenior+ LockedDesign ML system for self-driving perception
This question evaluates understanding of end-to-end ML system design for on-vehicle obstacle detection and collision avoidance, encompassing sensor fu...
ML System Design
15
0
126 people solved
Dec 8, 2025