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
Medium
Data ScientistInterpret a Smart Wait Launch with Conflicting Metrics
A product changes its wait-time display to show more conservative estimates. After launch, conversion falls by 5% while actual time to pickup falls by...
Analytics & Experimentation
7
0
44 people solved
Mar 14, 2026
Medium
Software EngineerFind invalid transactions in time-sorted input
Problem You are given a list of transaction records, already sorted in non-decreasing order by time. Each transaction is a string in the form: "name,t...
Coding & Algorithms
39
1
289 people solved
Dec 15, 2025
Medium
Software Engineer LockedDesign Collaborative Document Editing
This question evaluates system design and real-time collaboration competencies, including architectural scalability, low-latency synchronization, cons...
System Design
8
0
78 people solved
May 23, 2026
Medium
Software EngineerImplement a FIFO Queue Using Two Stacks
Implement a FIFO Queue Using Two Stacks Implement a first-in-first-out (FIFO) queue using only two last-in-first-out (LIFO) stacks. The implemented qu...
Coding & Algorithms
3
0
14 people solved
Jun 30, 2026
Medium
Machine Learning EngineerDesign Candidate Search And LLM Evaluation Tasks
Prepare for an MLE onsite with three themes: finding top candidates from a job description, reasoning about an unreliable deterministic comparator, an...
ML System Design
10
0
97 people solved
Apr 21, 2026
Medium
Software EngineerCalculate win chance in three-player dice game
Probability of Winning with Rerolls on Ties Setup - Three players: A (you), B, and C. - A fair six-sided die is used. - B and C have already rolled an...
Statistics & Math
71
1
538 people solved
Sep 6, 2025
Hard
Software EngineerDetect a Winner on a 3x3 Tic-Tac-Toe Board
Detect a Winner on a 3x3 Tic-Tac-Toe Board Implement tic_tac_toe_winner(board) for a completed or partially completed 3x3 board. Each cell is "X", "O"...
Coding & Algorithms
0
0
8 people solved
Jun 6, 2026
Medium
Software Engineer LockedDesign GenAI Fine-Tuning and Agent Tradeoffs
This question evaluates competency in generative AI fine-tuning techniques and production agent architecture, including trade-offs among full-precisio...
ML System Design
7
0
121 people solved
May 9, 2026
Hard
Software Engineer LockedImplement Spreadsheet Cell Updates
This question evaluates skills in data structures, expression parsing, dependency graph management, incremental evaluation, and cycle detection for ma...
Coding & Algorithms
5
0
29 people solved
May 9, 2026
Medium
Software EngineerDesign a multi-carrier parcel delivery system
Design a system for shipping customer parcels that supports multiple delivery partners/carriers (e.g., UPS, USPS, FedEx). Your system should enable an...
System Design
26
0
203 people solved
Mar 1, 2026
Medium
Software EngineerSenior+ LockedDesign Ad Frequency and Order Tracking
This question evaluates system-design competencies for building low-latency, high-throughput ad-platform components—specifically a real-time frequency...
System Design
39
0
461 people solved
Apr 26, 2026
Medium
Software Engineer LockedDesign an E-Commerce Shopping Website
This question evaluates a candidate's ability to design scalable, distributed backend systems for high-traffic e-commerce workloads. It tests practica...
System Design
3
0
51 people solved
Jun 5, 2026
Hard
Machine Learning Engineer LockedImprove Keyword Search Ranking
This question evaluates an ML engineer's search system design competency, including information retrieval and ranking principles, feature and model se...
ML System Design
20
0
141 people solved
Jun 5, 2026
Hard
Software EngineerBuild a Versioned In-Memory Database
Build a Versioned In-Memory Database The source reports a four-stage in-memory database exercise but does not provide its exact method signatures. The...
Coding & Algorithms
2
0
21 people solved
Jul 8, 2026
Medium
Software Engineer LockedScale a rules engine for high traffic
This question evaluates understanding of scalable real-time system design, distributed architectures, consistency versus latency trade-offs, caching a...
System Design
44
0
579 people solved
Feb 12, 2026
Medium
Software EngineerImplement a Vending Machine
Design and implement the core logic for a vending machine using object-oriented principles. The machine stores products, accepts bills, tracks the cur...
Software Engineering Fundamentals
34
0
301 people solved
Jan 28, 2026
Medium
Data Scientist LockedCompute Commuter Ride Probabilities
This question evaluates competency in probability theory—specifically conditional probability, marginalization, Bayesian inversion, and expectation of...
Statistics & Math
13
0
108 people solved
May 28, 2026
Medium
Software EngineerChoose Your Workplace Style
You are taking a forced-choice workplace-style assessment for a Software Engineer role. Each item contains three positive statements. For each item: 1...
Behavioral & Leadership
14
1
118 people solved
Apr 12, 2026
Medium
Site Reliability EngineerSenior+Troubleshoot a production server outage
You are the on-call engineer responsible for a production server for the next several days. Discuss how you would approach the following: - How would ...
Software Engineering Fundamentals
27
0
230 people solved
Apr 12, 2026
Hard
Software EngineerDesign a GPU-aware pod scheduler
Design a GPU-aware pod scheduler GPU-Aware Pod Scheduler and Cluster Manager (OO Design) Context You are designing a simplified, object-oriented clust...
System Design
62
1
828 people solved
Aug 7, 2025