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
Medium
Software EngineerCompute grid shortest path with obstacles
You are given an m x n grid of integers where cells with value -1 represent obstacles and all other cells are traversable. Starting at (0, 0) and targ...
Coding & Algorithms
5
0
38 people solved
Sep 6, 2025
Medium
Software EngineerDetect cycles in lists and graphs
Given a singly linked list, determine whether it contains a cycle. Implement an O( 1)-space algorithm and explain the intuition and correctness. Follo...
Coding & Algorithms
3
0
29 people solved
Sep 6, 2025
Medium
Software EngineerSolve jumps and anagram-similarity problems
You are given two independent tasks. Task A (Maximize calories over jumps): - There are n blocks with integer heights height[i] ≥ 0. - You start on th...
Coding & Algorithms
2
0
27 people solved
Sep 6, 2025
Medium
Machine Learning EngineerImplement automatic braking logic in Python
Using Python, implement a simple automatic braking function. Given current speed v (m/s), distance to obstacle d (m), maximum deceleration a_max (m/s^...
Coding & Algorithms
3
0
54 people solved
Sep 6, 2025
Medium
Software EngineerCount subarrays with product under target
Given an array of positive integers nums and an integer T > 1, return the number of contiguous subarrays whose product is strictly less than T. Provid...
Coding & Algorithms
1
0
36 people solved
Sep 6, 2025
Hard
Software EngineerImplement Bootstrap-like responsive utility classes
Build a Bootstrap-like Utility System and Accessible Responsive Form (No External CSS) Context You are asked to create a minimal, reusable CSS utility...
Software Engineering Fundamentals
6
0
52 people solved
Sep 6, 2025
Medium
Software EngineerImplement BFS serializer and deserializer
Implement two functions, serialize(obj) -> representation and deserialize(representation) -> obj, for a Python object graph containing str, int, and d...
Coding & Algorithms
24
0
191 people solved
Sep 6, 2025
Medium
Machine Learning EngineerLoad and prepare JSON for modeling
Using Python in a Jupyter notebook, load a JSON dataset with fields: ( 1) hours spent reading A posts (float), ( 2) hours spent reading B posts (float...
Data Manipulation (SQL/Python)
0
0
6 people solved
Sep 6, 2025
Medium
Software EngineerImplement a gig worker payout calculator
Implement a payout calculator for gig workers (e.g., delivery drivers). Given a list of completed orders with timestamps, distances, and tips, plus po...
Data Manipulation (SQL/Python)
1
0
20 people solved
Sep 6, 2025
Hard
Software EngineerDesign an async donation payment platform
System Design: Online Donation Platform for a 3-Day Campaign Context You are designing a donation platform for a time-bounded, high-traffic, three-day...
System Design
10
0
74 people solved
Sep 6, 2025
Medium
Software EngineerDesign error detection and propagation algorithms
You are given three related sub-problems about error detection and propagation. A) Log search: You have a chronologically ordered array of log lines. ...
Coding & Algorithms
4
0
32 people solved
Sep 6, 2025
Medium
Software EngineerMirror a binary tree and analyze complexity
Given the root of a binary tree, convert it to its mirror by swapping every node’s left and right children. Implement both recursive and iterative (us...
Coding & Algorithms
5
0
43 people solved
Sep 6, 2025
Medium
Software EngineerFind normalized list difference efficiently
Given two lists of strings, list1 and list2, return all elements that appear in list1 but not in list2 after applying a consistent normalization step ...
Coding & Algorithms
4
0
52 people solved
Sep 6, 2025
Medium
Data EngineerOptimize SQL to minimize scans
Given a large analytics query, refactor it to minimize table scans. 1) Replace unnecessary CTEs that cause multiple scans with inline aggregations or ...
Data Manipulation (SQL/Python)
3
0
6 people solved
Sep 6, 2025
Medium
Software EngineerCompute top-N active customers
Maintain and return the top N customers by cumulative activity amount, where activity is defined as the sum of deposit amounts, pay amounts, and trans...
Coding & Algorithms
5
0
40 people solved
Sep 6, 2025
Medium
Software EngineerFind returning users from access logs
Given a large user access log, parse it and identify which user_ids are returning customers—i.e., they have at least one visit on two or more distinct...
Data Manipulation (SQL/Python)
0
0
5 people solved
Sep 6, 2025
Medium
Software EngineerFill rooms with nearest gate distances
You are given an m×n integer grid representing rooms, where -1 is a wall, 0 is a gate, and INF (a large sentinel such as 2^31− 1) is an empty room. Fo...
Coding & Algorithms
1
0
26 people solved
Sep 6, 2025
Medium
Software EngineerEvaluate SQL expressions for zero
Which of the following SQL expressions evaluate to 0? Evaluate each independently, justify the result, and note any dialect-specific behavior (e.g., M...
Data Manipulation (SQL/Python)
0
0
5 people solved
Sep 6, 2025
Medium
Data ScientistSolve a Skyscraper puzzle efficiently
Design and implement a solver for the Skyscraper logic puzzle on an $N \times N$ grid, where $3 \le N \le 7$. The board is a grid of building heights....
Coding & Algorithms
47
0
329 people solved
Sep 6, 2025
Medium
Software EngineerCross-reference logs to flag spam numbers
You are given two data sets: ( 1) a call log containing phone numbers observed in calls and ( 2) a list of user reports where each entry is a phone nu...
Coding & Algorithms
7
0
130 people solved
Sep 6, 2025