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 Engineer LockedCompute total time to finish all courses
This question evaluates competency in graph algorithms and scheduling, including dependency resolution, cycle detection, and aggregation of task durat...
Coding & Algorithms
6
0
95 people solved
Jan 6, 2026
Medium
Software Engineer LockedValidate whether brackets are properly nested
This question evaluates proficiency in sequence validation, paired-token matching, and the use of data structures to manage nested elements within str...
Coding & Algorithms
13
0
101 people solved
Jan 6, 2026
Hard
Software EngineerIntern LockedWhat skills are needed for AI infra roles?
This question evaluates familiarity with AI infrastructure and LLM serving, including systems and performance engineering, model inference mechanisms,...
ML System Design
10
0
81 people solved
Jan 6, 2026
Medium
Software Engineer LockedValidate CSV rows under multiple verification rules
This question evaluates skills in CSV parsing, string normalization and multi-rule data validation, covering whitespace handling, length checks, case-...
Coding & Algorithms
4
0
33 people solved
Jan 6, 2026
Medium
Software Engineer LockedVerify business accounts with progressive KYC rules
This question evaluates skills in string parsing, text normalization, rule-based validation, and token-based string matching within a KYC verification...
Coding & Algorithms
10
0
72 people solved
Jan 6, 2026
Medium
Machine Learning Engineer LockedExplain why CTR rises but CVR unchanged
This question evaluates a candidate's competency in experimental design and statistical analysis, specifically interpreting divergent engagement and o...
Analytics & Experimentation
4
0
57 people solved
Jan 6, 2026
Medium
Software EngineerAnswer behavioral questions about delivery and influence
Behavioral questions Prepare structured answers (e.g., STAR) to the following: 1. Complex problem, simple solution: Give an example of a complex probl...
Behavioral & Leadership
15
0
118 people solved
Jan 6, 2026
Medium
Data ScientistInternEstimate ATE of personalization on streaming
You are given a user-level dataset from an online experiment that randomized personalization (treatment) vs no personalization (control). Assume one r...
Analytics & Experimentation
25
0
302 people solved
Mar 5, 2026
Easy
Data Scientist LockedDefine and critique a user activity metric
This question evaluates a candidate's ability to design and critique user-activity metrics, covering event-level instrumentation, metric validity, and...
Analytics & Experimentation
6
0
77 people solved
Nov 15, 2025
Hard
Software EngineerSenior+Detect a Reachable Negative Cycle
Detect a Reachable Negative Cycle Given a directed weighted graph, determine whether a negative-weight cycle is reachable from a specified start verte...
Coding & Algorithms
0
0
9 people solved
May 13, 2026
Hard
Software EngineerSenior+Track the Median of a Stream
Track the Median of a Stream Design a data structure that accepts integers one at a time and returns the median of all values seen so far. The capture...
Coding & Algorithms
0
0
6 people solved
May 13, 2026
Hard
Software EngineerSenior+Measure Water Trapped Between Elevations
Measure Water Trapped Between Elevations Given a list of nonnegative integer elevations where each bar has width one, return the total number of unit ...
Coding & Algorithms
0
0
10 people solved
May 13, 2026
Medium
Software EngineerProcess time intervals and detect overlaps/gaps
You are given n time intervals representing debug log segments. Each interval has a start time, an end time, and an associated text message. - Each in...
Coding & Algorithms
40
0
405 people solved
Nov 14, 2025
Hard
Frontend EngineerSenior+Implement a Reusable Dropdown Component
Implement a reusable dropdown component for a production frontend application using a modern framework such as React. The component should support a c...
Software Engineering Fundamentals
4
0
45 people solved
Jan 5, 2026
Medium
Machine Learning Engineer LockedMinimize exact layover bookings
This question evaluates algorithmic problem-solving and numeric precision handling, specifically the ability to model exact-duration sums and minimize...
Coding & Algorithms
10
1
76 people solved
Jan 5, 2026
Medium
Machine Learning EngineerNew Grad LockedImplement Depth-First Search Traversal
This question evaluates implementation and conceptual understanding of graph traversal algorithms, specifically depth-first search on adjacency-list r...
Coding & Algorithms
3
0
28 people solved
Jan 5, 2026
Medium
Data ScientistEvaluate new-product notification feature
A marketplace team is considering building a feature that notifies buyers when new products relevant to their interests are listed. How would you dete...
Analytics & Experimentation
5
0
36 people solved
Jan 5, 2026
Easy
Data ScientistFind expected tosses to see a coin pattern
A fair coin is tossed repeatedly until a target length-3 pattern appears as a consecutive substring (e.g., HHH, HTH, HTT, etc.). 1) Describe a general...
Software Engineering Fundamentals
1
0
30 people solved
Jan 5, 2026
Medium
Software EngineerStore a hierarchy and return all children
Design a service to store a hierarchical tree of nodes and expose APIs. Requirements: - Persist a hierarchy (a forest with multiple roots is acceptabl...
System Design
4
0
68 people solved
Jan 5, 2026
Medium
Software Engineer LockedImplement four string-processing functions
This question evaluates string-processing and list-manipulation skills, including character membership testing and sequence filtering, reflecting comp...
Coding & Algorithms
15
0
121 people solved
Jan 5, 2026