Interview Questions
Practice the exact questions companies are asking right now.
Questions
9.8k
Companies
511
Updated
08.16.2026
9.8k Questions 511 Companies08.16.2026
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
Software EngineerCluster 3D Points by a Distance Threshold
Implement cluster_points_3d(points, D). Create an undirected edge between two distinct 3D points when their Euclidean distance is strictly less than D...
Coding & Algorithms
0
0
5 people solved
May 9, 2026
Medium
Software Engineer LockedDesign a Distributed Crossword Solver
This question evaluates competency in distributed systems design, scalable indexing and storage, parallel search and constraint-satisfaction reasoning...
System Design
35
0
649 people solved
May 9, 2026
Medium
Software EngineerRestore an Array with One Displaced Element
Restore an Array with One Displaced Element An integer array was originally sorted in nondecreasing order. It was then changed by removing at most one...
Coding & Algorithms
3
0
30 people solved
Jul 2, 2026
Medium
Backend EngineerSenior+Handle Competing Requests from Colleagues
Handle Competing Requests from Colleagues Tell me about a time a colleague asked you to take on work that was outside your current plan or competed wi...
Behavioral & Leadership
1
0
15 people solved
Jul 2, 2026
Easy
Machine Learning EngineerQuery Top Played Tracks Globally And By Country
Given a play_events table with columns user_id, track_id, timestamp, and country, write SQL to return the top N most played tracks globally and the to...
Data Manipulation (SQL/Python)
8
4
144 people solved
Jul 2, 2026
Hard
Machine Learning Engineer LockedDesign a Production ML Serving System
This question evaluates a candidate's competency in operating and scaling ML-powered production systems, focusing on scaling, reliability and fault to...
ML System Design
16
0
186 people solved
Jan 12, 2026
Medium
Software Engineer LockedDesign a malicious-URL checking service using an isMalicious API
This question evaluates system design competencies such as scalable API design, caching and cache invalidation strategies, rate limiting and backpress...
System Design
16
0
213 people solved
Jan 12, 2026
Medium
Backend EngineerSenior+ LockedImplement a Stateful Trading Order Manager
Build a stateful trading order manager with deterministic command results, lifecycle transitions, bulk cancellation, and live-order display. Assign us...
Coding & Algorithms
1
0
13 people solved
Jun 12, 2026
Medium
Software Engineer LockedIn-Memory URL Shortener: Encode and Decode
This question evaluates a candidate's ability to design a class-based data structure with paired encode and decode operations that maintain a consiste...
Coding & Algorithms
0
0
9 people solved
Jun 12, 2026
Medium
Data ScientistHow do you test two variants vs control?
You ran an A/B/n experiment with 1 control and 2 treatment variants. The primary metric is conversion rate (each user either converts or not within th...
Analytics & Experimentation
11
0
103 people solved
Nov 30, 2025
Easy
Software EngineerRepair Unsafe C++ Ownership with Smart Pointers
Repair Unsafe C++ Ownership with Smart Pointers Review this ownership sketch: `cpp class Engine { public: void start(); }; class Controller { ...
Software Engineering Fundamentals
1
0
19 people solved
Apr 9, 2026
Medium
Machine Learning EngineerTrain and analyze a classifier
You are given a labeled dataset for binary classification. Implement an end-to-end Python solution that trains a classifier and analyzes it to a produ...
Data Manipulation (SQL/Python)
28
0
544 people solved
Jul 31, 2025
Easy
Software Engineer LockedImplement a Unique Lines Command
This question evaluates mastery of file I/O, streaming algorithms, stateful line processing, and memory-efficient handling of large inputs, situating ...
Coding & Algorithms
3
0
36 people solved
May 25, 2026
Medium
Machine Learning EngineerBuild A Purchase-Intent Prediction Notebook
Build a machine learning notebook that predicts whether a user session will lead to a purchase. The training and test CSV files contain page counts, t...
Machine Learning
3
0
26 people solved
Apr 23, 2026
Medium
Machine Learning EngineerFind Earliest Train Route
You are given a discrete train timetable and need to find a valid route through the train network. Each train has an itinerary represented as a sequen...
Coding & Algorithms
3
0
38 people solved
Apr 23, 2026
Medium
Data ScientistShould Company Launch Vegan Burger Based on Profit Analysis?
Case: Launching a Vegan Burger — Unit Economics and Go/No-Go You are a data scientist supporting a product team that is deciding whether to launch a v...
Analytics & Experimentation
124
0
590 people solved
Jul 12, 2025
Medium
Software Engineer LockedDesign an encrypted log collection system
This question evaluates competence in distributed systems design, secure transport and storage, encryption and key management, scalability, and observ...
System Design
10
0
74 people solved
Jan 22, 2026
Medium
Machine Learning Engineer LockedDesign a game genre classifier
This question evaluates system design and machine learning competencies, including multi-modal modeling (text, images, tabular), data and label qualit...
ML System Design
13
0
111 people solved
Feb 27, 2026
Hard
Software Engineer LockedDesign an A/B Testing Platform
This question evaluates a candidate's ability to design scalable, reliable experimentation and analytics platforms, testing competencies in distribute...
System Design
13
0
125 people solved
Feb 27, 2026
Hard
Machine Learning Engineer LockedSearch Monster Battle Strategies
This question evaluates algorithmic problem-solving around deterministic simulation and state-space exploration, focusing on handling transient state ...
Coding & Algorithms
26
0
210 people solved
Apr 8, 2026