Interview Questions
Practice the exact questions companies are asking right now.
"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"
"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"
"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."
"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."
"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."
"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."
"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."
"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."
"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."
"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."
"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."
"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."
"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."
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
"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."
Find a Local Minimum in One and Two Dimensions
Given an array of unique numbers, return any element that is smaller than its neighbors. Then discuss the two-dimensional follow-up where you need to ...
Count Perfect Digit-Frequency Substrings
Count Perfect Digit-Frequency Substrings Problem Implement countPerfectSubstrings(s, k). The string s contains only decimal digits. A nonempty substri...
Find Each User's Earliest Seven-Day Activity Streak
Find Each User's Earliest Seven-Day Activity Streak Write one PostgreSQL SELECT statement or CTE query. Do not create, alter, or modify tables. Schema...
Diagnose Strong Validation and Weak Production Performance
Diagnose Strong Validation and Weak Production Performance You are given a training repository for a model whose validation metric looks strong while ...
Choose Mean or Median for Trading Profit Metrics
A trading firm observes daily profit values X_1 through X_n and wants a metric for average performance. In an interview, you must choose between mean ...
Represent and Evaluate Boolean Predicate Expressions
Design a data structure to represent and evaluate predicates such as abc > 5 and (test < 8 or team > 9). Support comparisons, and, or, parentheses, an...
Behavioral Round: Judgment, Prioritization, and Influence
Behavioral Round: Judgment, Prioritization, and Influence This was the behavioral interview. You will be asked three questions about judgment, reprior...
Prevent Vanishing Gradients in Deep Networks
Prevent Vanishing Gradients in Deep Networks Clarifying Questions to Ask - Are we discussing feed-forward networks, recurrent networks, or both? - Sho...
Design a Payment Orchestration System
Design a Payment Orchestration System Design the merchant-side service that coordinates payment authorization, capture, refund, and status tracking th...
Design an Evaluation Platform for a Design-Editing Agent
Design an Evaluation Platform for a Design-Editing Agent A design application includes an agent that edits a user's document from natural-language ins...
Implement a Time-Aware Banking System
Implement a Time-Aware Banking System Design an in-memory banking component in four increments. It must create accounts, accept deposits, transfer fun...
Reduce Cold-Food Incidents with Metrics and an Insulated-Bag Experiment
Reduce Cold-Food Incidents with Metrics and an Insulated-Bag Experiment A delivery marketplace wants to reduce the support costs, credits, and refunds...
Debug Feature Updates in a Laptop Management CLI
Debug Feature Updates in a Laptop Management CLI You are debugging a command-line laptop management system. Each laptop belongs to one or more users a...
Implement a Consistent Hash Ring
Implement a Consistent Hash Ring Design a consistent-hashing component that maps arbitrary keys to backend nodes and minimizes remapping when nodes ar...
Design a Governed Agent for Portfolio Rebalancing
Design a Governed Agent for Portfolio Rebalancing Design an agentic architecture that can propose and, when authorized, execute portfolio rebalancing....
Reason About an Intercept Shift in Logistic Regression
Reason About an Intercept Shift in Logistic Regression A trained binary classifier produces p(x) = sigmoid(w^T x + b) and predicts the positive class ...
Design an Audit Logs Service
This question evaluates the ability to design a scalable, multi-tenant audit logging system, covering event storage, tamper-evident retention, and eff...
Design a Read- and Write-Heavy Product Catalog Service
Design a Read- and Write-Heavy Product Catalog Service Design a service in which merchants create and update product listings while users browse and v...
Allocate IPO Shares and Split a Weighted Tree
Two Allocation and Tree Problems Implement both independent parts. Part A - IPO Share Allocation Each bid is [user_id, requested_shares, price, timest...
Design a Distributed Key-Value Store
This system design question evaluates the ability to architect a horizontally scalable distributed key-value store, covering data partitioning, replic...