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
Hard
Data Scientist LockedInterpret and Regularize Regression Models
This question evaluates a data scientist's competency in regression model interpretation, hypothesis testing for coefficients and p-values, outcome tr...
Statistics & Math
18
0
153 people solved
May 3, 2026
Medium
Backend Engineer LockedDesign a Cloud-Agnostic Upload Adapter
Design a provider-neutral upload library that hides cloud SDK differences without flattening every provider capability into one interface. Cover strea...
Software Engineering Fundamentals
1
0
22 people solved
Jun 22, 2026
Medium
Software EngineerDesign a Store Recommendation System and Explain ML Trade-offs
Design a store recommendation system and discuss ML domain trade-offs, including a decision-tree-style refund model. `hint Hint 1 Start by stating ass...
ML System Design
5
0
74 people solved
Jul 2, 2026
Medium
Machine Learning Engineer LockedDesign a fraud detection system
This question evaluates a candidate's competency in designing end-to-end fraud detection machine learning systems, covering real-time and batch featur...
ML System Design
51
1
433 people solved
Jan 22, 2026
Hard
Software EngineerDesign a File Backup System
Design a scalable file backup system. You are given access to basic file-system primitives such as listing directories, reading file metadata, reading...
System Design
24
0
205 people solved
Apr 11, 2026
Medium
Software Engineer LockedDesign a hotel reservation system
This question evaluates skills in designing distributed reservation systems, covering availability search, concurrency control, data modeling, API des...
System Design
1
0
21 people solved
May 26, 2026
Medium
Data ScientistDesign Pricing Model Experiment
You work as a data scientist for a ride-hailing marketplace. The company wants to launch a new pricing model that may change the price shown to riders...
Analytics & Experimentation
5
0
87 people solved
Mar 28, 2026
Medium
Data Scientist LockedImplement NumPy neural-network layers
This question evaluates competency in implementing neural-network layers and array algebra in NumPy, including matrix multiplication, broadcasting rul...
Machine Learning
44
0
361 people solved
Feb 18, 2026
Medium
Software EngineerDesign a Food Review Platform
Design a Food Review Platform Design a platform where users discover food businesses, read reviews, and submit ratings and review text. Clarify whethe...
System Design
1
0
15 people solved
Apr 3, 2026
Medium
Machine Learning Engineer LockedDesign Duplicate File Detection
This question evaluates system design and storage engineering skills, including scalable file-processing, efficient I/O and resource management, corre...
System Design
47
0
346 people solved
Apr 3, 2026
Hard
Machine Learning EngineerDebug transformer and train classifier
Debug and Fix a Transformer Text Classifier, Then Train and Evaluate It You inherit a small codebase for a transformer-based text classifier. It ships...
Machine Learning
175
0
2053 people solved
Aug 4, 2025
Medium
Machine Learning EngineerFind the Lowest Common Ancestor in a Binary Search Tree
Lowest Common Ancestor in a Binary Search Tree Problem A binary search tree contains distinct integer values. You are given the tree in level-order fo...
Coding & Algorithms
0
0
5 people solved
Jun 21, 2026
Medium
Machine Learning EngineerMerge Overlapping Intervals
Merge Overlapping Intervals Problem You are given an unsorted list of closed integer intervals. Each interval is represented as [start, end], where st...
Coding & Algorithms
0
0
5 people solved
Jun 21, 2026
Hard
Data ScientistPresent and critique an airline delay analysis
Predicting Airline Departure Delays — Technical Screen Prompt Context You have 15 minutes to review a slide deck on predicting airline departure delay...
Analytics & Experimentation
31
0
211 people solved
Oct 13, 2025
Medium
Software EngineerCount Connected Friend Groups
Count Connected Friend Groups You are given an n x n symmetric adjacency matrix. is_connected[i][j] == 1 means person i and person j are directly conn...
Coding & Algorithms
7
0
45 people solved
Jul 1, 2026
Medium
Software EngineerSenior+ AISolve Parser, Trading, Tree, And Deck Tasks
You will solve several independent programming tasks. For each task, implement clean, tested code and state the time and space complexity. 1. Validate...
Coding & Algorithms
5
0
39 people solved
Apr 9, 2026
Medium
Software EngineerDesign an Extensible Rule Engine
Design an object-oriented rule engine that evaluates declarative rules against a record. The rule language must support comparison predicates such as ...
Software Engineering Fundamentals
1
0
15 people solved
Apr 2, 2026
Easy
Software EngineerSolve three easy algorithm problems
You are given three independent algorithmic tasks. For each one, explain your approach (no need to run code). 1) Merge two sorted lists (integers inst...
Coding & Algorithms
34
0
293 people solved
Nov 11, 2025
Hard
Software EngineerSenior+ LockedDesign Top-K, Crawler, and Chess Systems
This question evaluates system-design competency across scalable distributed services, covering real-time streaming Top-K aggregation, large-scale dis...
System Design
10
0
111 people solved
Jun 2, 2026
Hard
Software EngineerDesign a satellite propagation simulator
Design a satellite propagation simulator Object-Oriented SatelliteNetwork: Message Propagation Simulator Design and implement an object-oriented Satel...
System Design
53
0
416 people solved
Jul 16, 2025