Interview Questions
Practice the exact questions companies are asking right now.
Questions
9.7k
Companies
511
Updated
08.16.2026
9.7k 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
Medium
Machine Learning EngineerFind max min-plus-max over all subarrays
Find max min-plus-max over all subarrays You are given an array arr of n integers. A subarray is a contiguous non-empty segment of the array. For any ...
Coding & Algorithms
5
0
37 people solved
Jul 18, 2025
Medium
Machine Learning EngineerInternValidate normalized palindromes with variants
Implement a function isNormalizedPalindrome(s) that returns true if s reads the same forward and backward after removing non‑alphanumeric characters a...
Coding & Algorithms
14
1
109 people solved
Jul 17, 2025
Medium
Software EngineerImplement a simplified multi-level banking system
Implement a simplified multi-level banking system Implement a simplified banking system with multi-level requirements. All operations accept a stringi...
Coding & Algorithms
9
0
83 people solved
Jul 17, 2025
Medium
Software EngineerSolve three mini-game algorithm tasks
Solve three mini-game algorithm tasks Solve three mini-game algorithm tasks: (a) Move-House Puzzle: Given initial and target arrangements of N labeled...
Coding & Algorithms
12
0
86 people solved
Jul 17, 2025
Medium
Software EngineerImplement topological sort from string input
You receive N lines of raw text describing task dependencies, e.g., 'install A after B', 'C->A', 'B before D'. Implement a function that: ( 1) parses ...
Coding & Algorithms
12
0
155 people solved
Jul 17, 2025
Medium
Software EngineerCompute nearest dashmart and busiest assignments
Compute nearest dashmart and busiest assignments You are given an m x n grid of characters where 'D' marks a dashmart, 'X' marks an impassable cell, a...
Coding & Algorithms
7
0
75 people solved
Jul 17, 2025
Medium
Software EngineerImplement string sum and weighted city picker
Implement string sum and weighted city picker Part A — Add two numbers represented as strings: Given two non‑negative integers provided as decimal str...
Coding & Algorithms
3
0
36 people solved
Jul 17, 2025
Medium
Software EngineerImplement cheapest itinerary with date filters
Implement a function that computes the cheapest itinerary from a given origin to a destination using a list of flights, where each flight has (id, sou...
Coding & Algorithms
8
0
117 people solved
Jul 17, 2025
Medium
Software EngineerSolve snake game, peak search, and task scheduling
Solve snake game, peak search, and task scheduling 1) Design a grid-based snake simulation that supports move(direction) operations on a W×H board. Th...
Coding & Algorithms
4
0
73 people solved
Jul 17, 2025
Medium
Software EngineerParse chemical formula with multipliers
Parse chemical formula with multipliers Given a string representing a chemical formula, parse it and return the total count of each element. The formu...
Coding & Algorithms
3
0
34 people solved
Jul 16, 2025
Medium
Data EngineerSolve library coding tasks in Python
Solve library coding tasks in Python Implement the following Python tasks: 1) Given a list of (category, points) for books, choose up to 3 books with ...
Coding & Algorithms
12
0
86 people solved
Jul 16, 2025
Medium
Data EngineerWrite SQL for library analytics
Given a library database, write SQL to answer the following: 1) Count the number of books that are currently not returned (i.e., still checked out) an...
Data Manipulation (SQL/Python)
1
0
14 people solved
Jul 16, 2025
Medium
Software EngineerDetect currency arbitrage with costs
You are given a K×K matrix R of currency exchange rates where R[i][j] is the amount of currency j obtainable for one unit of currency i, and R[i][i] =...
Coding & Algorithms
36
0
261 people solved
Jul 16, 2025
Medium
Software EngineerDesign refundable transaction ledger and prioritization rules
Design and implement a transaction ledger that ingests a stream of records where each record is either a payment or a refund. Each payment has {id, us...
Coding & Algorithms
32
0
298 people solved
Jul 16, 2025
Medium
Software EngineerCount decodings of a digit string
Count decodings of a digit string You are given a non-empty digit string s consisting of characters '0'–'9' and a mapping where 1->'a', 2->'b', ..., 2...
Coding & Algorithms
3
0
37 people solved
Jul 16, 2025
Medium
Software EngineerGroup anagrams and count string in grid
Part 1 — Group Anagrams: Given an array of strings, group together strings that are anagrams of one another and output both the grouped lists and the ...
Coding & Algorithms
4
0
35 people solved
Jul 16, 2025
Medium
Software EngineerImplement range-sum tree and sort merged lists
Implement range-sum tree and sort merged lists 1) Given a binary tree whose nodes store integer values, and two integers low and high defining an incl...
Coding & Algorithms
4
0
38 people solved
Jul 16, 2025
Medium
Data ScientistImplement sparse vector dot product and cosine similarity
Sparse Vector Class Implement a SparseVector class for high-dimensional vectors where most entries are zero. Representation Assume each vector has: - ...
Coding & Algorithms
6
0
56 people solved
Jul 15, 2025
Medium
Software EngineerSolve two string algorithm tasks
Solve two string algorithm tasks Answer both parts. A) Parentheses correction: Given a string s consisting only of '(' and ')', output the minimum num...
Coding & Algorithms
3
0
25 people solved
Jul 15, 2025
Medium
Software EngineerWrite complex SQL for cohorts and retention
Given tables users(uid, created_at, country), orders(order_id, uid, amount, created_at, status), and events(uid, ts, event_type, campaign), write one ...
Data Manipulation (SQL/Python)
0
0
9 people solved
Jul 15, 2025