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
Machine Learning EngineerDesign and implement a tiny language runtime
Design and implement a tiny language runtime Minimal Imperative Language — Design and Implementation Task Context You are asked to design and implemen...
System Design
37
1
439 people solved
Aug 1, 2025
Medium
Machine Learning Engineer LockedExplain multithreading vs multiprocessing
This question evaluates understanding of concurrency and parallelism, specifically multithreading versus multiprocessing, their interaction with multi...
Software Engineering Fundamentals
50
0
373 people solved
Feb 11, 2026
Medium
Machine Learning Engineer LockedDesign an app-store app recommendation system
This question evaluates a candidate's competency in end-to-end machine learning system design for recommender systems, covering personalization, candi...
ML System Design
11
0
206 people solved
Feb 11, 2026
Easy
Data ScientistDescribe a quantitative market model you built
Question You are interviewing for a quantitative, market-facing Data Scientist role at BlackRock. Answer the following three prompts. 1. Quantitative ...
Behavioral & Leadership
14
0
129 people solved
Feb 11, 2026
Medium
Data EngineerChoose Between Batch and Streaming for a Data Pipeline
Prompt The interview report mentioned detailed questions about the candidate's batch- and stream-processing experience, but it did not preserve an exa...
System Design
6
0
50 people solved
May 5, 2026
Hard
Software Engineer LockedWhen to use a dictionary vs an array?
This question evaluates understanding of data structures—arrays/lists versus dictionaries/hash maps—focusing on access patterns, time complexity for c...
Software Engineering Fundamentals
18
0
162 people solved
Jan 17, 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
Easy
Software Engineer AIImplement a Credit API Workflow
You are given documentation for a sandbox credit-management API. The documentation describes API operations for creating an account, adding credits, c...
Software Engineering Fundamentals
6
0
67 people solved
Apr 4, 2026
Medium
Data ScientistImplement a Safe Average Function in Python
Write a Python function average(table) that returns the arithmetic mean of a list of numbers and returns 0 when the list is empty. Explain the functio...
Data Manipulation (SQL/Python)
6
0
56 people solved
Mar 14, 2026
Hard
Software EngineerModel particle hits on a screen
A point source at (0, 0) emits particles toward an infinite vertical screen located at x = 1. For each particle, sample an angle theta uniformly from ...
Software Engineering Fundamentals
46
0
419 people solved
Feb 22, 2026
Medium
Machine Learning EngineerSenior+Answer senior-level behavioral interview questions
You are interviewing for a senior machine-learning engineer role on the tech-lead track at Meta, targeting roughly the IC6+ level. This is the first-r...
Behavioral & Leadership
23
0
193 people solved
Jan 28, 2026
Medium
Software EngineerCompare Core Networking and Language Runtime Concepts
Explain the following core software-engineering concepts as if answering a technical screen. Use concrete examples, distinguish guarantees from common...
Software Engineering Fundamentals
2
0
31 people solved
Feb 3, 2026
Medium
Software Engineer LockedReverse a Singly Linked List
This question evaluates a candidate's grasp of linked list pointer manipulation and in-place data structure transformation. It tests the ability to re...
Coding & Algorithms
2
0
18 people solved
Jun 18, 2026
Medium
Software Engineer LockedFind Shortest Unique Prefixes
This question evaluates string-processing skills and understanding of data structures for prefix management (e.g., tries), along with algorithmic effi...
Coding & Algorithms
2
0
14 people solved
Jun 18, 2026
Medium
Software EngineerImplement a crash-resilient LRU cache
Implement an LRU-based memoization helper with behavior similar to a standard Python LRU cache. You are given an interface like this: `python class LR...
Coding & Algorithms
722
4
5132 people solved
Mar 13, 2026
Medium
Machine Learning EngineerSenior+Normalize targets for multitask regression
You are training one machine learning model with a shared representation and two regression heads. Each example has two continuous labels: - Target A ...
Machine Learning
3
0
64 people solved
Apr 18, 2026
Medium
Software EngineerInternDescribe Key Behavioral Examples
Prepare to answer behavioral questions based on past internship or project experience. Common prompts include: 1. Tell me about a time when you disagr...
Behavioral & Leadership
57
0
392 people solved
Mar 19, 2026
Medium
Software Engineer LockedImplement a Circular Buffer
This question evaluates understanding of data structures and buffer management, specifically FIFO semantics, fixed-capacity storage, wraparound indexi...
Coding & Algorithms
4
0
51 people solved
May 20, 2026
Medium
Machine Learning EngineerDesign an S3-like object storage service
Design a cloud object storage service similar to Amazon S3. The service should allow clients to upload, store, and download large files reliably and e...
System Design
37
0
354 people solved
Dec 8, 2025
Medium
Software Engineer LockedDesign An Ad Creative Relationship Processing System
Prepare for a system design interview about processing ad creative plans, videos, keywords, and relationship results from an external model API. The p...
System Design
2
0
18 people solved
Jun 17, 2026