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 Scientist LockedAnswer core probability and inference questions
This question evaluates understanding of statistical inference and probability fundamentals, covering the Central Limit Theorem, p-values, Type I and ...
Statistics & Math
7
0
74 people solved
Oct 11, 2025
Easy
Data ScientistExplain core ML concepts and metrics
You are interviewing for a Data Scientist role. Answer the following ML fundamentals questions clearly and concisely. Concepts 1. Explain the bias–var...
Machine Learning
9
0
89 people solved
Oct 11, 2025
Medium
Software EngineerSenior+Implement web data fetch and storage tool
Problem You are asked to implement a small program that retrieves data from a remote web service protected by token-based authentication, parses the r...
Coding & Algorithms
18
0
274 people solved
Oct 11, 2025
Medium
Machine Learning EngineerML System Design: Thumbnail Selection for a Streaming Catalog
ML System Design: Thumbnail Selection for a Streaming Catalog You work at a video streaming service. For each title in the catalog (movie or show), th...
ML System Design
1
0
21 people solved
Feb 10, 2026
Easy
Data Scientist LockedTraverse org chart level by level
This question evaluates understanding of hierarchical data modeling and tree traversal, specifically breadth-first (level-order) traversal and reconst...
Coding & Algorithms
6
0
46 people solved
Feb 9, 2026
Easy
Data ScientistWrite SQL for TikTok Live creator metrics
You are analyzing TikTok Live sessions and their engagement. Tables live_room Each row is a Live session (“room”) launched by a creator. | column | ty...
Data Manipulation (SQL/Python)
17
0
138 people solved
Oct 9, 2025
Hard
Data ScientistDesign experiments for marketplace product changes
You are interviewing for a Data Scientist role at a food-delivery marketplace such as DoorDash. For each scenario below, explain how you would evaluat...
Analytics & Experimentation
14
0
235 people solved
Feb 9, 2026
Medium
Software EngineerDesign an in-memory banking system
Implement an in-memory banking system (e.g., in Java) that supports the following operations on user accounts. Assume user IDs are unique strings and ...
Coding & Algorithms
40
1
431 people solved
Feb 9, 2026
Medium
Data ScientistWrite SQL to compute signup and retention lift
You are analyzing an A/B test for a marketing campaign that offers a free 1‑month trial. Assume all timestamps are in UTC. Tables experiment_assignmen...
Data Manipulation (SQL/Python)
15
0
132 people solved
Oct 8, 2025
Hard
Software Engineer LockedBuild a least-recently-used cache
This question evaluates a candidate's competence in designing and implementing efficient in-memory cache mechanisms, focusing on data structures, evic...
Coding & Algorithms
4
0
36 people solved
Feb 8, 2026
Medium
Software Engineer LockedSolve Three Coding Problems
This set of problems evaluates competencies in streaming data handling and incremental aggregation, time-dependent grid traversal and reachability und...
Coding & Algorithms
2
0
25 people solved
Feb 8, 2026
Medium
Software EngineerImplement ASCII canvas and solve two data problems
Solve the following coding tasks. 1) ASCII Canvas / Printer Implement a small drawing engine for a fixed-size canvas of width = 10 and height = 6. - E...
Coding & Algorithms
5
1
62 people solved
Feb 8, 2026
Medium
Machine Learning Engineer LockedCompute sum over consecutive-step subarrays
This question evaluates proficiency in array processing, detection of consecutive-step arithmetic sequences, and accumulation of subarray sums with at...
Coding & Algorithms
10
1
85 people solved
Feb 8, 2026
Hard
Software EngineerSenior+Describe conflict resolution and mentoring experiences
You are interviewing for an engineering manager or senior engineer role. Prepare structured behavioral answers for these four prompts: 1. Describe a s...
Behavioral & Leadership
4
0
41 people solved
Mar 23, 2025
Hard
Software EngineerChoose container set to minimize waste
Question A pharmaceutical company is packaging liquid medicine for shipment. Each customer order has a required volume. The company can choose exactly...
Coding & Algorithms
11
0
111 people solved
Oct 6, 2025
Medium
Product ManagerHow do you prioritize requirements
In a TikTok platform Product Manager interview, explain how product requirements are generated and how you prioritize competing work for a platform pr...
Product / Decision Making
5
0
67 people solved
Oct 6, 2024
Medium
Software Engineer LockedFind the Shortest Target-Sum Path
This question evaluates skills in binary tree traversal, path-sum computation, and optimization for selecting a root-to-leaf path with the minimal num...
Coding & Algorithms
1
0
28 people solved
Feb 7, 2026
Medium
Site Reliability EngineerDetermine Complete Interval Coverage
You need to process a stream of real-valued points on a one-dimensional target segment from 0 to 50. Each time a point x arrives, it contaminates the ...
Coding & Algorithms
8
0
75 people solved
Feb 7, 2026
Medium
Software EngineerPopulate next pointers in a perfect binary tree
You are given a perfect binary tree (all leaves at the same level; every internal node has two children). Each node has fields left, right, and next. ...
Coding & Algorithms
7
0
78 people solved
Feb 7, 2026
Medium
Software Engineer LockedSolve maze reachability and two follow-ups
This set of tasks evaluates graph and state-space search with constrained movement (maze rolling ball), tree algorithms and recursion for computing di...
Coding & Algorithms
12
0
97 people solved
Feb 7, 2026