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
Easy
Data ScientistCompute probabilities for chatbot response quality
Context A chatbot response is considered good if it is both: - Helpful, and - Honest. You are told: - \(P(\text{Helpful}) = 0.8\) - \(P(\text{Honest})...
Statistics & Math
4
1
91 people solved
Oct 30, 2025
Hard
Software EngineerDesign a Collaborative Notes Service
Design a collaborative notes service, similar to a lightweight online document editor. Users should be able to create, read, update, delete, and share...
System Design
4
0
59 people solved
Apr 29, 2025
Easy
Product AnalystExplain a project’s impact and product thinking
A Head of Product asks: 1. Pick one analytics/data science project you led end-to-end. 2. What was the product problem and why did it matter? 3. What ...
Behavioral & Leadership
15
0
108 people solved
Feb 22, 2026
Medium
Data Scientist LockedFind least active countries
This question evaluates proficiency in SQL-based data manipulation and analytics, focusing on time-based filtering, distinct aggregation, grouping, th...
Data Manipulation (SQL/Python)
4
1
43 people solved
Feb 22, 2026
Medium
Software EngineerSimulate pouring water onto a 1D terrain
You are given a 1D terrain represented by an integer array heights, where heights[i] is the height of the column at index i. Part 1 — Render terrain W...
Coding & Algorithms
37
0
269 people solved
Oct 28, 2025
Hard
Software EngineerDesign ride-hailing and price alert systems
During a system design interview, you are asked two related but separate design questions. Treat each as an independent end-to-end design; you will be...
System Design
2
0
58 people solved
Oct 28, 2025
Medium
Product ManagerHow would you manage platform transitions?
How would you manage platform transitions? You are the PM for a software product undergoing a system migration. How would you maintain support for the...
Product / Decision Making
14
0
104 people solved
Jul 22, 2025
Medium
Software Engineer LockedDesign a Recency-Eviction Cache
This question evaluates proficiency with data structures and algorithmic design for implementing a fixed-capacity key-value cache that enforces recenc...
Coding & Algorithms
5
0
38 people solved
Feb 21, 2026
Hard
Data Scientist LockedHow to design Shop ad ranking
This question evaluates a candidate's expertise in machine learning and data science for ad ranking systems, including objective formulation and trade...
Machine Learning
3
0
30 people solved
Oct 26, 2025
Medium
Data EngineerHiring-Manager Round: Project Ownership, Influence, Communication, and Setbacks
This is the hiring-manager video round for a data/software engineering role. The interviewer opens by asking you to walk through a recent project you ...
Behavioral & Leadership
1
0
23 people solved
Feb 20, 2026
Medium
Data EngineerGenerate All Well-Formed Parenthesis Strings
A string of parentheses is called well-formed if every opening bracket ( has a matching closing bracket ) and the brackets are correctly nested. For e...
Coding & Algorithms
0
0
6 people solved
Feb 20, 2026
Medium
Software EngineerCount connected islands using Union-Find
You are given an m x n grid of characters where '1' represents land and '0' represents water. An island is a group of horizontally or vertically adjac...
Coding & Algorithms
29
0
228 people solved
Feb 20, 2026
Easy
Data ScientistSenior+Correct length-biased sampling from family-size survey
In a town, you visit a school and ask 100 kids: “How many children are in your family?” You observe: - 50 kids say their family has 1 child - 20 kids ...
Statistics & Math
14
0
141 people solved
Feb 19, 2026
Medium
Data Scientist LockedFind index with positive suffix sums
This question evaluates array manipulation and algorithmic problem-solving skills, focusing on reasoning about cumulative (suffix) sums and time-compl...
Coding & Algorithms
5
1
97 people solved
Feb 19, 2026
Easy
Software EngineerFind next greater element for subset
You are given two integer arrays query and nums. - All elements in nums are distinct. - Every element in query also appears in nums. For each value x ...
Coding & Algorithms
3
0
37 people solved
Feb 19, 2026
Easy
Data ScientistIntern LockedCount closed islands in a grid
This question evaluates grid traversal and connected-component detection skills, focusing on 4-directional adjacency and boundary-condition reasoning ...
Coding & Algorithms
8
0
63 people solved
Feb 18, 2026
Medium
Software EngineerCount calls in recursive function evaluation
Consider the following recursive function in C-like pseudocode: `c int x(int n) { if (n <= 3) return 1; else return x(n - 2) + x(n - 4) + 1; }...
Software Engineering Fundamentals
4
0
34 people solved
Oct 24, 2025
Medium
Software EngineerChoose unsuitable file structure for random access
When a file system must support efficient random access to records, which of the following physical file structures is not suitable for this scenario?...
Software Engineering Fundamentals
3
0
34 people solved
Oct 24, 2025
Medium
Software EngineerConvert binary tree traversals to forest count
A binary tree has the following traversals: - Inorder: A, B, C, D, E, F, G - Postorder: B, D, C, A, F, G, E This binary tree is converted to an equiva...
Software Engineering Fundamentals
5
0
45 people solved
Oct 24, 2025
Medium
Software EngineerSenior+Demonstrate leadership and team development
Demonstrate leadership and team development Behavioral & Leadership: End-to-End Project Leadership (L5-level) Context: This is a behavioral prompt oft...
Behavioral & Leadership
4
0
43 people solved
Jul 17, 2025