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 EngineerDesign a RAG system end to end
Design a Retrieval‑Augmented Generation (RAG) System for Enterprise Text Context You are building a production RAG system that answers employee questi...
ML System Design
15
1
128 people solved
Sep 6, 2025
Hard
Machine Learning EngineerExplain Transformers, attention, decoding, RL, and evaluation
Technical Screen: Transformers, Attention, Decoding, RLHF, Evaluation, and Optimization Context: Assume a modern decoder-only LLM unless stated otherw...
Machine Learning
30
0
285 people solved
Sep 6, 2025
Hard
Software EngineerExplain database design and consistency
System Design (Technical Screen): Database Portion of a Project Provide a structured description of the database component of a real project you owned...
System Design
11
0
86 people solved
Sep 6, 2025
Medium
Machine Learning EngineerConvert stack samples to execution trace
You are given sampling-profiler output: a list of Sample objects ordered by timestamp ascending. Each Sample has (t: float, stack: list[str]) where st...
Coding & Algorithms
53
0
863 people solved
Sep 6, 2025
Medium
Software EngineerImplement robust debounce and throttle in JavaScript
Implement debounce(fn, wait, options) and throttle(fn, wait, options) in JavaScript. Support leading/trailing invocation toggles, maxWait for throttle...
Coding & Algorithms
6
0
50 people solved
Sep 6, 2025
Medium
Software EngineerGenerate Weighted Random NFTs with Updates
You manage k NFT types, each with a positive integer rarity weight w[i]. Implement a minter: constructor(w) builds any needed structures in O(k); mint...
Coding & Algorithms
22
0
207 people solved
Sep 6, 2025
Hard
Software EngineerDesign an extensible ticketing system
System Design: Extensible EventTicketSystem Context Design a ticketing platform that sells tickets for concerts, movies, and sports. The system must s...
System Design
8
0
64 people solved
Sep 6, 2025
Hard
Software EngineerDesign async batched key-value fetcher
Design an async, batched key-value fetcher with a 100 ms window Context You have a single-threaded, event-loop environment (e.g., JS/TS). A backend en...
System Design
15
0
249 people solved
Sep 6, 2025
Hard
Software EngineerDesign an in-memory cloud storage system
In-Memory Cloud Storage Service (Take-home) Design and implement an in-memory cloud storage service that maps files (objects) to their metadata. The s...
System Design
18
0
249 people solved
Sep 6, 2025
Hard
Software EngineerDesign signals across power and clock domains
Question In a SoC with two power domains A and B, design the interface for a control signal signal_1 (a registered 1-bit control such as an enable/sta...
System Design
20
0
148 people solved
Sep 6, 2025
Hard
Data EngineerDesign tables for event-driven metrics
Design a Relational Schema for Consumer-App Event Analytics Context and Assumptions You are designing the event store for a high-volume consumer app. ...
System Design
8
0
81 people solved
Sep 6, 2025
Medium
Software EngineerImplement a nested object validator
Implement a helper function validate(object, required_style) that checks whether a possibly nested object matches a provided schema. The object may co...
Data Manipulation (SQL/Python)
16
0
230 people solved
Sep 6, 2025
Medium
Software EngineerPrint the K-th non-empty line
Given a large UTF-8 text file, write a program that prints the K-th non-empty line. Do not load the whole file into memory. Specify how you handle fil...
Data Manipulation (SQL/Python)
14
0
128 people solved
Sep 6, 2025
Hard
Software EngineerDesign API for split-stay combinations
Question Design an HTTP API endpoint that, given a requested date range and a collection of Airbnb listings with their availability, returns all valid...
System Design
62
0
430 people solved
Sep 6, 2025
Medium
Software EngineerWalk through project scope, ownership, and decisions
Walk through project scope, ownership, and decisions Behavioral: Walk Through a Significant Project (Technical Screen — Software Engineer) Provide a d...
Behavioral & Leadership
12
0
130 people solved
Aug 7, 2025
Hard
Data ScientistOptimize interval-scoring strategy
Optimize interval-scoring strategy Five-Round Interval-Estimation Game: Optimal Intervals and Risk Allocation You play five independent rounds. In rou...
Statistics & Math
12
0
116 people solved
Aug 7, 2025
Medium
Software EngineerExtend rules for trip-level aggregates and outputs
Extend rules for trip-level aggregates and outputs Extend Rules Engine: Aggregate Trip-Level Policies Context You previously built an expense policy e...
System Design
20
0
253 people solved
Aug 7, 2025
Medium
Software Engineer LockedImplement a Timestamped Counter
This question evaluates the ability to design and implement time-indexed counting data structures, reason about strictly increasing timestamps and que...
Coding & Algorithms
2
0
50 people solved
Mar 1, 2026
Medium
Machine Learning EngineerExplain your career and flagship project
Walk through your background from university to your current role. For each major transition, explain why you made that choice, what challenge you fac...
Behavioral & Leadership
9
0
65 people solved
Mar 1, 2026
Hard
Machine Learning EngineerSenior+ AI LockedFind Maximum Unique-Character Subset
This question evaluates algorithm design and combinatorial optimization skills, specifically the ability to model disjoint-character constraints, hand...
Coding & Algorithms
2
0
50 people solved
Mar 1, 2026