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
Software EngineerSolve interval merge and string dedup problems
You are given three coding questions from a phone screen. Solve each independently. 1) Merge overlapping intervals Input: A list of intervals interval...
Coding & Algorithms
37
0
257 people solved
Oct 22, 2025
Medium
Software EngineerDesign a distributed tree node counter
Design a distributed tree node counter Distributed Tree Node Count with Two Messages You are given an N-ary tree of machines (one process per node). E...
System Design
50
0
460 people solved
Jul 26, 2025
Medium
Data Scientist LockedShould WhatsApp launch group calls?
This question evaluates a data scientist's skills in experiment design, product analytics, metric definition, causal inference, and managing network e...
Analytics & Experimentation
18
0
128 people solved
Mar 24, 2026
Hard
Software EngineerDesign Search Autocomplete
Design a large-scale autocomplete service for a search engine. As a user types a query prefix, the system should return the top 5 suggested full queri...
System Design
9
0
57 people solved
Apr 12, 2026
Easy
Software Engineer LockedDescribe Delivering Under a Tight Deadline
This question evaluates ownership, judgment, prioritization, and the ability to deliver results under time pressure, including how the candidate balan...
Behavioral & Leadership
19
4
293 people solved
May 2, 2026
Medium
Software Engineer LockedReverse Nodes in Groups of K
This question evaluates a candidate's ability to manipulate linked list pointers in place, handling in-group reversal while preserving overall structu...
Coding & Algorithms
1
0
18 people solved
Jun 18, 2026
Medium
Software Engineer LockedCount Clusters of 2D Points Within a Radius
This question tests graph traversal skills, specifically identifying connected components among a set of 2D points using distance-based adjacency. It ...
Coding & Algorithms
3
2
16 people solved
Jun 18, 2026
Medium
Machine Learning Engineer LockedImplement Top-p (Nucleus) Sampling in NumPy
This coding question tests practical implementation of top-p (nucleus) sampling, a core decoding strategy in large language models. It evaluates NumPy...
Coding & Algorithms
0
0
13 people solved
Jun 18, 2026
Medium
Machine Learning Engineer LockedImplement Multi-Head Attention from Scratch in NumPy
This coding question tests a machine learning engineer's understanding of Transformer internals by requiring a from-scratch NumPy implementation of mu...
Coding & Algorithms
1
0
6 people solved
Jun 18, 2026
Medium
Software EngineerExplain a past project and critique a prior team
Interview prompts 1. Project deep dive: Pick a past project you worked on and walk through it end-to-end. Be ready to use a whiteboard to explain arch...
Behavioral & Leadership
12
0
130 people solved
Oct 20, 2025
Hard
Software Engineer LockedDesign a Retrieval-Augmented Generation (RAG) system
This question evaluates a candidate's ability to design production-grade Retrieval-Augmented Generation systems, testing competencies in information r...
ML System Design
7
0
113 people solved
Dec 15, 2025
Medium
Software Engineer LockedDesign a Twitter hashtag metrics aggregator
This question evaluates competency in designing scalable, low-latency real-time stream processing and aggregation systems, covering concepts such as w...
System Design
12
0
115 people solved
Dec 15, 2025
Hard
Machine Learning EngineerDesign a chatbot fallback for unknown questions
Scenario You run a ChatGPT-like assistant. Users sometimes ask questions the model cannot answer reliably (unknown/uncertain/needs up-to-date facts). ...
ML System Design
10
0
143 people solved
Dec 15, 2025
Hard
Software Engineer LockedDesign Online Chess Matchmaking
This question evaluates a candidate's ability to design scalable, low-latency matchmaking backend systems, covering distributed service decomposition,...
System Design
25
0
362 people solved
May 24, 2026
Medium
Software Engineer LockedImplement a Snapshot Set Iterator
This question evaluates data structure design, versioning, and iterator consistency concepts within the Coding & Algorithms domain, focusing on implem...
Coding & Algorithms
3
0
32 people solved
May 24, 2026
Medium
Data ScientistInternCompute ITT, TOT, and LATE with noncompliance
In the same personalization experiment, not everyone assigned to treatment actually receives personalization (noncompliance). You are given user-level...
Analytics & Experimentation
22
0
169 people solved
Mar 5, 2026
Medium
Software EngineerDebug a Machine Learning Pipeline
Debugging a Sudden Accuracy Drop in a Deployed ML Pipeline Context You are on-call for a production machine learning service. Monitoring alerts show t...
Machine Learning
53
0
694 people solved
Aug 4, 2025
Medium
Data ScientistExplain Your Experience and Interest in Tech Role
Explain Your Experience and Interest in Tech Role Scenario Initial HR screening call for a TikTok Data Scientist internship/full-time role. The recrui...
Behavioral & Leadership
88
0
245 people solved
Aug 4, 2025
Medium
Software EngineerDesign an object-oriented parking lot system
Design an object-oriented model for a parking lot management system. Requirements: - The parking lot has multiple levels; each level has multiple park...
Software Engineering Fundamentals
26
0
188 people solved
Nov 2, 2025
Medium
Software EngineerSenior+Present a Project With Correctness Guarantees
Prepare a 1-2 slide presentation about a system or product you personally built, owned, or significantly improved. In the interview, walk through: - t...
Behavioral & Leadership
6
0
116 people solved
Jan 14, 2026