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."
Solve Two Backtracking Array Problems
You will solve two independent coding problems. For each problem, first discuss edge cases, then implement a correct solution, and finally explain how...
Evaluate Overlapping Shelf Ranking Experiments
Fetch is running two A/B experiments in its mobile app. Product context The app displays product shelves. Each shelf contains multiple products, and t...
Assemble DNA payload strings from tagged fragments
You are given a list of DNA-like fragments. Each fragment is a tuple: - start_tag: string - end_tag: string - payload: string A valid DNA chain is for...
How do you answer common HR screen questions?
You are interviewing for a senior-level role and have a first-round HR/recruiter screening call. Prepare strong, concise responses to the following co...
Maximize sum with no adjacent elements
Given an array of non-negative integers nums, choose a subset of elements such that no two chosen elements are adjacent in the original array. Return ...
How do you prioritize and handle failures?
Answer the following behavioral questions with concrete examples from your experience. 1) Prioritization approach - When you have multiple competing t...
Explain motivation for QA and career goals
Questions Answer the following as if speaking to a hiring manager: 1. Where do you want to develop your career in the next 2–5 years, and why? 2. Why ...
Model y from x and interpret distributions
Scenario You are given a dataset with one input feature x and a target y. The interviewer asks: “How would you model this?” Later, you are shown a plo...
How do you handle conflict and ambiguity?
You are asked a series of detailed behavioral questions. Answer each with specific context, actions, and measurable outcomes. Conflict, teamwork, and ...
Plan a major database version upgrade
You have an application tier (API/web servers) talking to a primary database for writes and a secondary/replica database for reads. You need to perfor...
Design a meeting room reservation API
Meeting room reservation (OOD) You are designing a small in-memory meeting reservation system. Requirements - The system starts with N meeting rooms (...
Design an in-memory database
Design an in-memory database System Design: In-Memory Database Engine (Single-Node Core, Scale-Out Aware) Context Design the core of an in-memory, sin...
Design a News Aggregator
Design a news aggregation system that collects articles from many external news sources and serves a unified feed to end users. A key constraint is th...
Hiring-Manager Round: Project Ownership, Influence, Communication, and Setbacks
This is the hiring-manager video round for a data/software engineering role. The interviewer opens by asking you to walk through a recent project you ...
Design a Pipeline to Process a Billion Clickstream Events Per Day
You are designing the data infrastructure for a large consumer web/mobile product. The product emits a clickstream: every page view, tap, scroll, and ...
Design multi-tab browser history and trade-offs
Design: Multi-Tab Browser History Context: Extend a single-tab browser-history component into a multi-tab manager that supports opening/closing tabs, ...
Solve three easy algorithm problems
You are given three independent algorithmic tasks. For each one, explain your approach (no need to run code). 1) Merge two sorted lists (integers inst...
Compute Optimal Die Re-roll Strategy
A fair six-sided die pays its face value in dollars. You may roll up to three times total. - After the first or second roll, you may either keep the o...
Teach a networking concept to a beginner
Scenario You previously worked as a tutor/TA for a computer networking course. Prompt Pretend you are teaching a short mini-lesson (3–5 minutes) to a ...
Implement minimal RLE encode/decode with max run K
You are given a run-length encoding (RLE) format that compresses a string by grouping consecutive repetitions of a short substring. Encoding format An...