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
Data ScientistCount unconnected posts and reactions
You are analyzing a newly launched feed feature intended to improve engagement by showing more unconnected content. Assume the following tables: - pos...
Data Manipulation (SQL/Python)
22
2
202 people solved
Apr 5, 2026
Medium
Software Engineer LockedFind Earliest Fully Connected Time
This question evaluates a candidate's understanding of dynamic graph connectivity, time-ordered event processing, and state maintenance in graphs, inc...
Coding & Algorithms
33
1
446 people solved
Apr 5, 2026
Medium
Machine Learning EngineerSenior+Why do transformers struggle with long context?
In a transformer-based model, why is it difficult to process very long input context? Explain the main challenges in terms of computation, memory usag...
Machine Learning
7
0
137 people solved
Apr 5, 2026
Hard
Data ScientistExplain motivations, projects, accomplishments, and teamwork
Behavioral & Leadership — Technical Screen (Data Scientist, Bank of America) Context You are interviewing for a Data Scientist role at Bank of America...
Behavioral & Leadership
12
0
94 people solved
Aug 11, 2025
Hard
Software Engineer LockedCalculate Per-User Usage Charges
This question evaluates algorithmic data aggregation, numeric billing computations, and the ability to model proration and threshold semantics across ...
Coding & Algorithms
6
0
59 people solved
Jan 3, 2026
Medium
Data ScientistHow investigate a brand-ad spend drop?
Meta has a video ads product with two ad types: - Direct ads: optimized for in-platform actions - Brand ads: users click the video ad and are sent to ...
Analytics & Experimentation
4
0
29 people solved
Jan 3, 2026
Medium
Data ScientistSenior+Simulate Uniform(0,1) from random bits
Assume you have access to a function rand_bit() that returns 0 or 1 with equal probability and independent across calls. How would you generate a rand...
Coding & Algorithms
2
0
41 people solved
Nov 24, 2025
Medium
Data ScientistHow would you validate a driving simulator’s realism?
You work on autonomous driving evaluation. You have two datasets for the same set of driving scenarios: - Real-world logs collected from vehicles (gro...
Analytics & Experimentation
6
0
46 people solved
Nov 24, 2025
Medium
Software EngineerHandle joining overworked low-WLB team
Scenario You have just joined a new engineering team. You quickly notice that: - Every team member appears very busy and often works long hours. - Wor...
Behavioral & Leadership
2
0
48 people solved
Nov 24, 2025
Hard
Software EngineerDesign a distributed job scheduler service
Design a distributed job scheduler service Design a horizontally scalable, multi-tenant job scheduler service that supports both one-off / ad-hoc jobs...
System Design
10
0
111 people solved
Aug 10, 2025
Easy
Product AnalystDecide whether to keep a negative-margin promotion
A retail team is running a Mulch promotion. The promotion currently has a negative unit margin (i.e., discounted price is below unit cost), so on the ...
Analytics & Experimentation
3
0
39 people solved
Feb 14, 2026
Medium
Data Scientist LockedAssess Stripe Capital Strategy
This question evaluates a data scientist's skills in product analytics, credit risk modeling, cohort and merchant-level metric design, experimentation...
Analytics & Experimentation
4
0
66 people solved
Oct 17, 2025
Easy
Data ScientistIdentify a classic bagging algorithm
Identify a classic bagging algorithm Multiple choice: Bagging Which of the following algorithms is a classic example of bagging (bootstrap aggregating...
Machine Learning
2
0
53 people solved
Aug 9, 2025
Hard
Software EngineerDesign a Dockerized GPU test pipeline
Design a Dockerized GPU test pipeline Design a Docker-Based Environment for Automated Graphics Tests on NVIDIA/AMD GPUs Context You need to design a r...
System Design
17
0
144 people solved
Aug 9, 2025
Medium
Software Engineer LockedAssign tasks to workers with types and accounts
This question evaluates algorithmic scheduling and dynamic resource-allocation skills, including priority-queue/heap usage, time-based simulation, and...
Coding & Algorithms
5
0
78 people solved
Jan 2, 2026
Medium
Software EngineerAnswer feedback, conflict, and failure questions
Behavioral Questions Prepare structured answers (use STAR: Situation, Task, Action, Result) for: 1. Giving constructive feedback: Tell me about a time...
Behavioral & Leadership
10
0
107 people solved
Jan 2, 2026
Medium
Site Reliability EngineerFind Maximum Chain Activations
You are given n devices, where each device is represented as [x, y, r]. Device i is located at coordinates (x, y) and can directly activate device j i...
Coding & Algorithms
1
0
22 people solved
Apr 4, 2026
Medium
Software EngineerImplement 3x3 matrix transforms and rotation
Implement 3x3 matrix transforms and rotation For a 3x3 matrix, write Python code to: (a) transpose it in-place; (b) swap any two rows and any two colu...
Coding & Algorithms
17
0
134 people solved
Aug 8, 2025
Medium
Software Engineer AI LockedImplement a Worker Hours Register
This question evaluates data structures and algorithms skills for temporal event tracking, interval arithmetic, stateful session management, ranking, ...
Coding & Algorithms
14
0
108 people solved
Feb 14, 2026
Easy
Software EngineerExplain your fit and motivation
Prepare strong answers for these behavioral prompts: 1. Why do you want to work at Arm? 2. Why are you a strong fit for this role? 3. Describe a proje...
Behavioral & Leadership
4
0
54 people solved
Feb 14, 2026