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
Software EngineerCompute the Diameter of an Undirected Tree
Compute the Diameter of an Undirected Tree You are given an undirected tree with nodes numbered from 0 through n - 1. The diameter is the number of ed...
Coding & Algorithms
2
0
20 people solved
Apr 16, 2026
Hard
Software EngineerSenior+Convert Valid Snake Case to Lower Camel Case
Convert Valid Snake Case to Lower Camel Case Given a valid snake-case identifier, convert it to lower camel case. The input consists of one or more lo...
Coding & Algorithms
3
2
20 people solved
Apr 16, 2026
Medium
Software EngineerFind the Highest-Cost Top-Level Job
You are given a local JSON file, jobs.json, containing an array of background job records. Each record has: - id: a unique job identifier - parent_id:...
Coding & Algorithms
1
0
15 people solved
Apr 16, 2026
Medium
Software Engineer LockedSolve String Addition and Expression Evaluation
This question evaluates string manipulation and parsing skills for numeric computation, covering addition of integers represented as character arrays ...
Coding & Algorithms
5
0
39 people solved
Apr 16, 2026
Medium
Machine Learning EngineerExplain core ML concepts and lifecycle
You are interviewing for an ML Engineer role. Answer the following (conceptually; no code required): 1) Bias–variance tradeoff - What are bias and var...
Machine Learning
17
0
116 people solved
Dec 15, 2025
Medium
Software EngineerAnswer core behavioral questions using STAR
Behavioral Questions Answer the following questions. Use concrete examples from your experience. 1. Tell me about a proud project. 2. How did you hand...
Behavioral & Leadership
4
0
55 people solved
Dec 15, 2025
Medium
Machine Learning EngineerDesign a restaurant recommendation system
Question Design a restaurant recommendation system for a food delivery marketplace such as Uber Eats. When a user opens the home page, the system shou...
ML System Design
32
0
316 people solved
Dec 15, 2025
Medium
Software EngineerMerge Three Sorted Arrays Without Duplicates
Merge Three Sorted Arrays Without Duplicates You are given three integer arrays sorted in nondecreasing order. Merge them into one sorted array that c...
Coding & Algorithms
0
0
12 people solved
Mar 2, 2026
Hard
Machine Learning EngineerImprove Reddit onboarding
How would you improve the onboarding experience for new users on a community platform similar to Reddit? Assume the goal is to help first-time users q...
Behavioral & Leadership
7
0
73 people solved
Mar 2, 2026
Medium
Software EngineerDesign comment-likelihood prediction platform
Scenario You’re building an ML platform component that serves a model to predict the likelihood that a user will comment on a given post. The intervie...
ML System Design
18
0
137 people solved
Nov 10, 2025
Medium
Data ScientistFind the Minimum in a Rotated Sorted Array
Find the Minimum in a Rotated Sorted Array A strictly increasing array of distinct integers has been rotated at an unknown pivot. Return its minimum v...
Coding & Algorithms
0
0
5 people solved
Dec 14, 2025
Medium
Software EngineerIntroduce yourself and discuss resume details
Behavioral Interview Prompt: Self-Introduction, Resume Walkthrough, Project Deep Dives, Collaboration, and Questions What to Deliver - Self-introducti...
Behavioral & Leadership
12
0
76 people solved
Sep 6, 2025
Medium
Software EngineerDescribe handling conciseness feedback
Behavioral: Conciseness Feedback and Adaptation Provide a real example where you received feedback that your answers were not concise. Address the fol...
Behavioral & Leadership
9
0
131 people solved
Sep 6, 2025
Hard
Software EngineerImplement a minimal local HTTP server
Build a Minimal Local HTTP/1.1 Server (No Frameworks) Context You are asked to implement a minimal HTTP/1.1 server from scratch using only the standar...
System Design
22
0
209 people solved
Sep 6, 2025
Medium
Software EngineerExplain data structure fundamentals
Explain how a hash map works internally: hashing, collision resolution strategies (separate chaining vs. open addressing), load factor, and resizing. ...
Coding & Algorithms
8
0
80 people solved
Sep 6, 2025
Medium
Machine Learning EngineerGenerate values by weighted probabilities
Weighted Random Sampling Generator (Streaming) You are given: - A list of distinct integers values. - A matching list of nonnegative probabilities (we...
Statistics & Math
14
0
123 people solved
Sep 6, 2025
Hard
Software EngineerDiagnose distributed database inconsistency
Distributed Database Incident: Inconsistent Replicas You are on-call for a distributed database that serves production traffic. Dashboards show data i...
System Design
12
0
94 people solved
Sep 6, 2025
Hard
Machine Learning EngineerDesign RL-based spending limit policy
RL System Design: Per‑User Spending Limits You are designing a reinforcement learning (RL) system to set per-user spending limits in a payments/risk c...
ML System Design
3
0
62 people solved
Sep 6, 2025
Medium
Software EngineerExplain prompt engineering strategies for chatbots
Prompt Engineering for Reliable, Steerable, and Safe Chatbots Context You are designing a production-grade chatbot that must be reliable (consistent, ...
Machine Learning
19
0
141 people solved
Sep 6, 2025
Hard
Software EngineerDesign anomaly detection and response platform
Design an AI-Driven OS Snapshot Anomaly Detection Service Context You are designing a cloud service that ingests operating system (OS) snapshots from ...
ML System Design
9
0
94 people solved
Sep 6, 2025