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
Software EngineerSenior+Implement tail -n for a Very Large File
Implement tail -n for a Very Large File Design and implement the core of tail -n: given a seekable file and a non-negative integer n, return the final...
Software Engineering Fundamentals
4
0
56 people solved
Jan 1, 2026
Medium
Software EngineerCompare processes and threads in Linux and Python
Explain the differences between a process and a thread in Linux. Then explain how Python differs (e.g., the GIL), and when you would use Python thread...
Software Engineering Fundamentals
7
0
128 people solved
Jan 17, 2026
Medium
Software Engineer LockedImplement streaming enrichment aggregator
This question evaluates competency in stateful stream processing, event-driven aggregation, in-memory state management, time-based expiry, and produci...
Coding & Algorithms
14
0
124 people solved
Jan 11, 2026
Medium
Machine Learning EngineerDesign an S3-like object storage service
Design a cloud object storage service similar to Amazon S3. The service should allow clients to upload, store, and download large files reliably and e...
System Design
37
0
354 people solved
Dec 8, 2025
Medium
Software Engineer LockedPalindrome After Deleting at Most One Character
This question evaluates a candidate's ability to reason about two-pointer string traversal and palindrome verification under a single edit constraint....
Coding & Algorithms
1
0
17 people solved
Jun 20, 2026
Medium
Software Engineer LockedJava and Object-Oriented Design Fundamentals
This question assesses mastery of software engineering fundamentals across object-oriented design, Java collections, and the Spring framework. It test...
Software Engineering Fundamentals
2
0
24 people solved
Jun 20, 2026
Medium
Software Engineer AI LockedGrid Robot Command Simulator
This question tests practical coding ability by requiring implementation of a command-driven state machine on a bounded 2D grid. It evaluates simulati...
Coding & Algorithms
1
0
19 people solved
Jun 20, 2026
Medium
Machine Learning EngineerSenior+ LockedDesign a Revenue Ranking Platform
This question evaluates a machine learning engineer's competency in designing production-scale recommendation and ranking systems that balance revenue...
ML System Design
2
0
47 people solved
Jun 10, 2026
Medium
Software EngineerSolve chat, grid paths, and car rentals
You are given three independent programming tasks. For each, describe and implement an efficient algorithm, and be prepared to analyze its time and sp...
Coding & Algorithms
15
0
197 people solved
Dec 2, 2025
Medium
Data Scientist LockedHow would you evaluate a carousel launch?
This question evaluates a data scientist's skills in experimental design, product-metric specification, causal inference, and diagnostic analysis for ...
Analytics & Experimentation
52
0
324 people solved
Mar 10, 2026
Easy
Software EngineerCompare arrays, linked lists, hash tables, trees
Answer the following computer-science fundamentals questions: 1) What are the time complexities (Big-O) of common sorting algorithms (e.g., bubble sor...
Software Engineering Fundamentals
13
0
167 people solved
Feb 6, 2026
Medium
Software Engineer LockedMaximize correct guesses in a hat line puzzle
This question evaluates logical reasoning about information constraints, group strategy design, and combinatorial encoding in the Coding & Algorithms ...
Coding & Algorithms
9
0
92 people solved
Feb 12, 2026
Medium
Machine Learning EngineerDesign search autocomplete ML system
Design an ML-powered search autocomplete system that suggests query completions as the user types (e.g., after typing a prefix like "ipho" suggest "ip...
ML System Design
43
0
298 people solved
Feb 18, 2026
Medium
Software EngineerSenior+ LockedShortest Path in a Grid with Blocked Cells
This question tests a candidate's practical grasp of graph traversal algorithms applied to 2D grid problems, specifically BFS for unweighted shortest-...
Coding & Algorithms
0
0
11 people solved
Jun 19, 2026
Hard
Software EngineerExplain and Compare SGD and Adam
Explain and Compare SGD and Adam Explain how stochastic gradient descent updates model parameters and how Adam modifies those updates using moving est...
Machine Learning
0
0
12 people solved
Apr 20, 2026
Medium
Machine Learning Engineer LockedExplain multithreading vs multiprocessing
This question evaluates understanding of concurrency and parallelism, specifically multithreading versus multiprocessing, their interaction with multi...
Software Engineering Fundamentals
50
0
373 people solved
Feb 11, 2026
Medium
Machine Learning Engineer LockedDesign an app-store app recommendation system
This question evaluates a candidate's competency in end-to-end machine learning system design for recommender systems, covering personalization, candi...
ML System Design
11
0
206 people solved
Feb 11, 2026
Hard
Machine Learning EngineerDesign and implement a tiny language runtime
Design and implement a tiny language runtime Minimal Imperative Language — Design and Implementation Task Context You are asked to design and implemen...
System Design
37
1
435 people solved
Aug 1, 2025
Medium
Software Engineer LockedAssign meetings to rooms with delays
This question evaluates skill in scheduling algorithms, priority queue and heap usage, greedy decision-making, and time-based event simulation for man...
Coding & Algorithms
12
1
153 people solved
Jan 6, 2026
Medium
Data EngineerChoose Between Batch and Streaming for a Data Pipeline
Prompt The interview report mentioned detailed questions about the candidate's batch- and stream-processing experience, but it did not preserve an exa...
System Design
6
0
50 people solved
May 5, 2026