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
Hard
Machine Learning Engineer LockedDesign systems for global request detection and labeling
This question evaluates the ability to design scalable, low-latency ML systems for global streaming event detection and rapid labeling under extreme c...
ML System Design
7
0
60 people solved
Feb 9, 2026
Hard
Data ScientistSenior+ LockedExplain Linear Regression Assumptions
This question evaluates understanding of ordinary least squares linear regression assumptions and their implications for unbiased coefficient estimate...
Statistics & Math
3
0
57 people solved
Mar 5, 2026
Medium
Data EngineerDesign a schema for server engagement
You are building analytics for a chat platform similar to Discord. The raw event sources are: - server(server_id, creator_id, created_at) - server_vie...
System Design
14
0
119 people solved
Jan 17, 2026
Medium
Machine Learning EngineerDesign trending livestream discovery
Design a system for a live-commerce platform that surfaces trending livestreams to users. Assume an ML model for scoring trendiness or relevance alrea...
ML System Design
7
0
123 people solved
Jan 17, 2026
Medium
Software EngineerImplement weighted-eviction cache
Question Design and implement a weighted cache supporting get(key) and put(key, value, weight) operations. The cache has a total weight limit; when in...
Coding & Algorithms
23
0
124 people solved
Jul 29, 2025
Hard
Machine Learning EngineerExplain ML model fundamentals
Explain ML model fundamentals Comprehensive ML Concepts: Logistic Regression, Naive Bayes, Transformers, Multi-class Metrics, Bagging vs Boosting Cont...
ML System Design
49
0
192 people solved
Jul 29, 2025
Medium
Data ScientistHow would you evaluate a free-trial A/B test?
You run an online marketing experiment to evaluate whether offering a free 1‑month trial increases growth. Experiment context - Eligible visitors are ...
Analytics & Experimentation
10
0
190 people solved
Oct 8, 2025
Medium
Software EngineerSenior+ LockedCompute the Median After Each Stream Insertion
Compute the median after every insertion into an integer stream without repeatedly sorting the full prefix. Practice maintaining balanced data structu...
Coding & Algorithms
2
0
27 people solved
May 29, 2026
Medium
Machine Learning EngineerIntern AI LockedImplement Sparse Matrix Operations
This question evaluates proficiency in sparse linear algebra, efficient algorithms, and data-structure design for numerical and machine learning workl...
Coding & Algorithms
6
0
54 people solved
Feb 8, 2026
Easy
Software EngineerImplement four coding challenges
You are asked to solve the following four independent coding problems. --- 1) Block Placement Simulator (Tetris-like) You have an empty n x m grid (ro...
Coding & Algorithms
9
0
86 people solved
Feb 8, 2026
Medium
Machine Learning EngineerDesign Podcast Recap Generation
Design a production system that generates short podcast recaps for newly published episodes. Assume the system should ingest episode audio and metadat...
ML System Design
17
0
118 people solved
Mar 4, 2026
Medium
Machine Learning EngineerCompare Unsupervised Clustering Methods
Explain several unsupervised clustering approaches and when you would use each one. At a minimum, compare centroid-based clustering, hierarchical clus...
Machine Learning
7
0
101 people solved
Mar 4, 2026
Medium
Machine Learning EngineerSenior+ LockedImprove LLM reasoning for a domain task
This question evaluates competency in end-to-end LLM system design for improving multi-step reasoning, including task specification, data construction...
ML System Design
6
0
117 people solved
Dec 25, 2025
Medium
Software EngineerSenior+ AIExplain an AI-Assisted Engineering Workflow You Can Defend
Explain an AI-Assisted Engineering Workflow You Can Defend Choose a recent engineering project that you personally worked on. Use it to explain the fu...
Behavioral & Leadership
0
0
10 people solved
Apr 27, 2026
Easy
Data ScientistSolve Markov, OLS-rotation, and coin-toss probability
Answer the following three interview questions. 1) Basic properties of a Markov (transition) matrix Let \(P\) be a transition matrix of a (time-homoge...
Statistics & Math
64
0
577 people solved
Oct 6, 2025
Hard
Software EngineerDesign scalable LRU cache and backtracking API
Design scalable LRU cache and backtracking API System Design: Two Production-Ready Services A) Thread-Safe LRU Caching Service Design and describe a p...
System Design
15
0
229 people solved
Jul 26, 2025
Hard
Software EngineerDesign a news feed aggregator
Design a Large-Scale News Aggregator and Personalized Feed Design a production-ready news aggregation and personalized feed platform — think a consume...
System Design
24
0
382 people solved
Jul 26, 2025
Medium
Software EngineerSummarize Transcript Events in a Sliding Window
Summarize Transcript Events in a Sliding Window Implement transcript_window_summaries(events, window_size). events is an arrival-ordered list of (user...
Coding & Algorithms
2
0
15 people solved
Jul 5, 2026
Easy
Software EngineerReport Where a Value Appears
Report Where a Value Appears Given a target and an even-length integer list, return four binary flags describing whether the target occurs: 1. at an e...
Coding & Algorithms
1
0
10 people solved
Jul 5, 2026
Easy
Software EngineerScale Ingredient Quantities
Scale Ingredient Quantities Each ingredient is a string in the exact format "<quantity> <unit> <name>". Multiply every quantity by servings and return...
Coding & Algorithms
1
0
13 people solved
Jul 5, 2026