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
Software Engineer LockedHow would you scale batch image pipelines?
This question evaluates a candidate's competence in designing scalable, reliable batch image-processing pipelines, testing knowledge of distributed sy...
System Design
27
0
490 people solved
Nov 10, 2025
Medium
Machine Learning EngineerOptimize image filters on device
You are shipping an image-filter feature that must run entirely on a mobile device. Users expect preview latency below 30 ms on common phones, memory ...
ML System Design
4
0
84 people solved
Mar 1, 2026
Hard
Software EngineerSenior+ LockedImplement Validation and String Compression
This question evaluates string processing, input validation, tokenization, hierarchical string manipulation, and algorithmic complexity analysis skill...
Coding & Algorithms
2
0
46 people solved
Mar 1, 2026
Medium
Software EngineerBuild a Wordle-style game in React
Task Implement a simplified Wordle-style game as a small React app. No styling/CSS is required (plain HTML output is fine). Game rules (assume Wordle-...
Coding & Algorithms
15
0
142 people solved
Mar 1, 2026
Medium
Data EngineerExplain production model drop to a PM
Role Play: Communicate Model Degradation to a Non-Technical PM You are a data scientist. A PM says: > “Your model performed great on the validation se...
Behavioral & Leadership
9
0
88 people solved
Mar 1, 2026
Medium
Software EngineerCompute probability two arrivals meet within 15 minutes
Probability puzzle Two people plan to meet, but they arrive independently at a random time within the next 1 hour. - Person A’s arrival time is unifor...
Software Engineering Fundamentals
9
0
99 people solved
Dec 14, 2025
Hard
Software Engineer LockedDesign a batched inference API
This question evaluates competency in designing scalable, low-latency ML inference systems with dynamic batching, covering system architecture, reques...
ML System Design
8
0
94 people solved
Feb 8, 2026
Hard
Machine Learning EngineerDesign a harmful content detection system
Design a Harmful Content Detection System (Multilingual, Multimodal) Problem Statement You are designing a trust-and-safety system for a large, mobile...
ML System Design
14
0
158 people solved
Sep 6, 2025
Hard
Software EngineerDesign key management service
Design a Key Management Service (KMS) You are asked to design a production-grade, multi-tenant Key Management Service. A client provides a key identif...
System Design
9
0
147 people solved
Sep 6, 2025
Hard
Software EngineerDesign distributed log storage service
Design a Distributed Append-Only Log Storage System You are asked to design the storage layer of a distributed, partitioned, replicated append-only lo...
System Design
13
0
99 people solved
Sep 6, 2025
Hard
Machine Learning EngineerDesign a scalable MoE pretraining pipeline
Design a Large-Scale MoE Pretraining Pipeline (Bilingual LLM, 1T Tokens, 256×A100-80GB) Context You are designing a pretraining pipeline for a decoder...
ML System Design
22
0
173 people solved
Sep 6, 2025
Hard
Software EngineerDesign a scalable network I/O service
System Design: High-Volume Network I/O Backend (Files and Streaming) Context Design a backend service that supports millions of users uploading and do...
System Design
31
0
364 people solved
Sep 6, 2025
Hard
Software EngineerDesign and operate a monolith on Kubernetes
Design and Operate a Monolith on Kubernetes Context You are joining an infrastructure team. The backend is a single monolithic service. The company is...
System Design
34
0
238 people solved
Sep 6, 2025
Hard
Software EngineerDesign a price tracking system
Question Design a price tracking system for e-commerce sites (similar to price-history tools such as CamelCamelCamel or Keepa). The system ingests pro...
System Design
13
0
142 people solved
Sep 6, 2025
Medium
Software EngineerDesign large video upload for a YouTube-like app
System Design Prompt Design the video upload subsystem for a YouTube-like product that supports large video files. Core user flow 1. User selects a la...
System Design
6
0
103 people solved
Dec 13, 2025
Medium
Software Engineer LockedDesign a URL Shortener
This question evaluates system design and distributed systems competencies, including scalability, availability, data modeling, API design, caching, s...
System Design
6
0
91 people solved
Jan 19, 2026
Medium
Data ScientistNew Grad LockedEvaluate marketplace interventions
This question evaluates a data scientist's competency in product analytics, causal inference, and experimentation design for two-sided marketplaces, f...
Analytics & Experimentation
14
0
101 people solved
Mar 22, 2026
Easy
Data ScientistDescribe a challenging project and how you succeeded
Behavioral prompts Answer the following using a structured format (e.g., STAR: Situation, Task, Action, Result), focusing on your contributions, trade...
Behavioral & Leadership
6
0
76 people solved
Feb 7, 2026
Medium
Software EngineerSimulate a TTL Cache with LRU Eviction
Simulate a TTL Cache with LRU Eviction Implement a deterministic simulator for a cache that combines per-key expiration with a fixed-capacity least-re...
Coding & Algorithms
1
0
16 people solved
Jul 11, 2026
Medium
Software EngineerBuild a Progressive Banking System
Build a Progressive Banking System The source reports progressive account, activity-ranking, expiring-transfer, and merge features but not exact retur...
Coding & Algorithms
1
0
15 people solved
Jul 11, 2026