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 EngineerFind the second most frequent tag
You are given a list of strings in the following repeating order: [id1, name1, tag1, id2, name2, tag2, ...] So every 3 consecutive elements describe o...
Coding & Algorithms
14
0
113 people solved
Feb 4, 2026
Medium
Software EngineerImplement a multithreaded task executor with semaphores
Design and implement a thread-safe TaskExecutor that limits concurrent work using a semaphore-like mechanism. You are given an interface similar to: -...
Coding & Algorithms
11
0
119 people solved
Feb 4, 2026
Easy
Data ScientistCompute multi-account user distribution and unread pct
You are working on a product where a user can have multiple accounts, and each account can receive notifications. Tables Assume the following schemas:...
Data Manipulation (SQL/Python)
4
0
36 people solved
Feb 3, 2026
Medium
Machine Learning Engineer AI LockedImplement a Capacity-Bounded Cache
This question evaluates a candidate's ability to design and implement an efficient capacity-bounded in-memory key-value cache, assessing understanding...
Coding & Algorithms
6
0
71 people solved
Feb 3, 2026
Hard
Data Scientist LockedFind missing numbers in sequences
This question evaluates sequence pattern recognition, numerical reasoning with integers and rational numbers, and the ability to infer recurrences or ...
Coding & Algorithms
14
0
275 people solved
Feb 3, 2026
Medium
Software EngineerOutput lexicographically largest DFS traversal
You are given a graph with n nodes labeled 1..n and m edges. Assume an undirected graph unless stated otherwise. You must output a node visitation seq...
Coding & Algorithms
2
0
24 people solved
Feb 2, 2026
Medium
Software EngineerCount all palindromic substrings
Given a string s, count how many substrings of s are palindromes. - A substring is a contiguous block of characters. - A palindrome reads the same for...
Coding & Algorithms
4
0
30 people solved
Feb 2, 2026
Medium
Software Engineer LockedDesign a voting counter for restaurants
This question evaluates familiarity with hash-table–based counting, efficient update and lookup operations, handling of ties with a deterministic tie-...
Coding & Algorithms
4
0
33 people solved
Feb 2, 2026
Easy
Data Scientist LockedImplement sampling, subarray scan, and percentile estimate
This multi-part problem evaluates skills in random sampling and geometric probability for uniform 2D sampling, algorithmic array processing for findin...
Coding & Algorithms
8
1
84 people solved
Feb 1, 2026
Easy
Data ScientistCompute article-type diversity per user and histogram
You track article views and article metadata. Tables article_views - user_id INT - article_id INT - view_date DATE articles - article_id INT (PK) - ar...
Data Manipulation (SQL/Python)
5
0
40 people solved
Feb 1, 2026
Easy
Data ScientistCompute each member’s current notification status
Question You are given two tables describing LinkedIn members’ push-notification settings. Compute each member’s current notification status as of 202...
Data Manipulation (SQL/Python)
9
0
102 people solved
Feb 1, 2026
Easy
Data ScientistFind top countries by population per continent
Table world_population - continent VARCHAR - country VARCHAR - population BIGINT Assume each row is a country’s latest population and (continent, coun...
Data Manipulation (SQL/Python)
4
0
64 people solved
Feb 1, 2026
Easy
Software EngineerImplement Table Aggregation
You are given a table represented as a list of rows. Each row contains: - key: a string identifying a group - value: an integer Write a function that ...
Coding & Algorithms
34
0
280 people solved
Feb 1, 2026
Easy
Software EngineerFind Missing Ranges with Bounds
Given a sorted array of distinct integers nums and two integers lower and upper that define an inclusive interval [lower, upper], return all maximal r...
Coding & Algorithms
4
0
36 people solved
Feb 1, 2026
Easy
Machine Learning EngineerFind the Most Frequent Log Call
You are given a sequence of application log entries. Each entry contains the name of a function or API call made by the system. Write a function that ...
Coding & Algorithms
16
0
126 people solved
Feb 1, 2026
Medium
Software EngineerSolve tree view and parentheses cleanup
Solve the following two algorithm problems. 1. Right-side view of a binary tree Given the root of a binary tree, return the values of the nodes that w...
Coding & Algorithms
6
0
43 people solved
Feb 1, 2026
Medium
Data ScientistMove zeros to the front
Given an integer array nums, move all elements equal to 0 to the beginning of the array while preserving the relative order of all non-zero elements. ...
Coding & Algorithms
4
1
55 people solved
Feb 1, 2026
Hard
Software Engineer LockedDesign stack with O(1) minimum query
This question evaluates understanding of stack-based data structures, constant-time operation constraints, and handling edge cases such as empty queri...
Coding & Algorithms
57
0
432 people solved
Feb 1, 2026
Medium
Software EngineerFind minimum subarray length with k distinct integers
Given an integer array arr and an integer k, find the minimum length of a contiguous subarray that contains exactly k distinct integer values. Return ...
Coding & Algorithms
5
0
60 people solved
Jan 31, 2026
Medium
Data Scientist LockedMove zeros to the front
This question evaluates array manipulation and in-place algorithm competencies, including handling space-time trade-offs and preserving relative order...
Coding & Algorithms
4
0
38 people solved
Jan 30, 2026