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 EngineerCompare C++ Pointers and References
Compare C++ Pointers and References Compare C++ pointers and references. Explain initialization, nullability, reseating, syntax, arithmetic, ownership...
Software Engineering Fundamentals
1
0
15 people solved
May 15, 2026
Medium
Software Engineer AI LockedImplement Courier Delivery Cost Tracking
This question evaluates skills in time-interval arithmetic, in-memory state management, and billing computation for delivery records, including handli...
Coding & Algorithms
3
0
38 people solved
May 15, 2026
Hard
Software EngineerWalk through your background and proud project
Interview prompts (behavioral) 1. Walk me through your background and experience. - Focus on roles, scope, impact, and how your experience relates ...
Behavioral & Leadership
13
0
115 people solved
Feb 4, 2026
Medium
Software EngineerPropose and Validate a Mobile App Improvement
Assume you are working on a consumer mobile app. Propose one product improvement that could improve user engagement, retention, or conversion. Your an...
System Design
6
0
65 people solved
Jan 24, 2026
Medium
Software EngineerC++ Fundamentals: const Pointers, and map vs unordered_map
C++ Fundamentals: const with Pointers, and map vs unordered_map You are in a C++ fundamentals screening round. After the coding question, the intervie...
Software Engineering Fundamentals
5
0
49 people solved
Feb 26, 2026
Easy
Software EngineerSolve binary-tree reverse printing and LPS
You are given a binary tree node definition: - TreeNode { int val; TreeNode left; TreeNode right; } Answer the following two algorithmic questions. 1)...
Coding & Algorithms
12
0
137 people solved
Dec 24, 2025
Easy
Software EngineerRewrite Sentence-Ending Punctuation
Rewrite Sentence-Ending Punctuation Transform a string in two conceptual steps: 1. Add one extra exclamation mark to every maximal run of existing ! c...
Coding & Algorithms
1
0
11 people solved
Jul 5, 2026
Medium
Software EngineerFilter Repeated Robot Status Messages
Filter Repeated Robot Status Messages Implement filter_messages(events) for a robot status stream. Each event is a pair [timestamp, message]. Return, ...
Coding & Algorithms
6
1
25 people solved
Jul 5, 2026
Medium
Software EngineerImplement a two-user communications handler
One-at-a-time Two-User Communications Handler Context Design and implement a communications handler that supports exactly one active conversation at a...
System Design
18
0
127 people solved
Sep 6, 2025
Medium
Software Engineer LockedDesign a One-to-One Chat System
This question evaluates a candidate's ability to design scalable, real-time backend architectures for one-to-one messaging, covering competencies in d...
System Design
5
0
70 people solved
Apr 3, 2026
Medium
Software Engineer LockedCompute Minimum Task Completion Time
This question evaluates understanding of graph algorithms (topological sort and DFS), dependency scheduling, cycle detection, and critical-path comput...
Coding & Algorithms
1
0
14 people solved
May 30, 2026
Hard
Software EngineerCompute Remaining GPUs With Switching Limits
Suppose you manage n GPU clusters with fixed daily capacities capacity[i]. Each day starts fresh with the full capacity, because all GPUs are returned...
Coding & Algorithms
7
0
45 people solved
Apr 16, 2026
Medium
Software EngineerDesign access control and heartbeat systems
Design two backend systems. Part A: Door access control system Design a service that manages which people can open which doors. The system must suppor...
System Design
16
0
143 people solved
Jan 23, 2026
Easy
Machine Learning EngineerInternExplain and test completion-rate gaps
In a food delivery marketplace, alcohol-related orders have a lower order completion rate than non-alcohol orders. Answer the following: 1. Propose se...
Machine Learning
25
0
281 people solved
Mar 9, 2026
Hard
Machine Learning EngineerDesign a production RAG system
Question Design a production retrieval-augmented generation (RAG) system for enterprise document QA. Walk through the end-to-end architecture and just...
ML System Design
30
0
309 people solved
Aug 11, 2025
Medium
Software Engineer LockedDesign a Cloud File Storage Service
This question evaluates a candidate's ability to design scalable, secure distributed file storage systems, covering competencies in file and folder hi...
System Design
9
0
129 people solved
Feb 25, 2026
Medium
Data ScientistExplain SHAP in an ML System
Describe how you would build an end-to-end machine learning system for a business use case such as churn prediction, ad conversion prediction, or cont...
Machine Learning
11
0
99 people solved
Feb 25, 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 AI LockedImplement Article Vote Tracking
This question evaluates data structures, state-management, and algorithmic skills for tracking per-user votes, detecting vote flips, maintaining a mos...
Coding & Algorithms
4
0
42 people solved
May 14, 2026
Hard
Software EngineerNew GradSolve Graduate Trader Probability Questions
A graduate trader online assessment reportedly included the following quantitative reasoning, probability, and logic questions. Solve each problem. 1....
Software Engineering Fundamentals
4
0
77 people solved
Jan 22, 2026