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."
Explain Redis/MySQL internals and containers vs VMs
Answer the following backend fundamentals questions clearly and succinctly: 1. Redis internals - What is Redis’s high-level architecture? - What...
Describe an inclusive action you took
Inclusive culture behavioral question Your company strongly values an inclusive (inclusive culture) workplace. Prompt: Describe a time you took a conc...
Solve common string/DP/stack problems
You are given four independent coding tasks. For each task, describe your approach and analyze time and space complexity. Task 1: Longest substring wi...
Implement weighted random sampling with preprocessing
Weighted Random Sampling (with performance follow-up) You are given an array of positive weights w[0..n-1]. Implement a data structure that supports: ...
Design a high-scale URL shortener
Design a URL shortening service. Core APIs / Features - Create short URL: accept a long URL and return a short code / short URL. - Redirect: given a s...
Compute DiD and validate parallel trends
You are given observational/experiment-like panel data as three equal-length arrays: - period[i]: an integer time period label for observation i (e.g....
Design a near-real-time weather API
Question Design a weather data platform that retrieves best-effort hourly dumps from an external Weather Service API for approximately 2,000 locations...
Design a global multi-game leaderboard
Design a Global, Multi‑Game Leaderboard (Ladder) Service You are designing a global leaderboard platform used by many different games and modes. Each ...
Implement multi-head self-attention correctly
Implement Multi-Head Self-Attention (from scratch) Context You are given an input tensor X with shape (batch_size, seq_len, d_model). Implement a mult...
Design JSON serialization for circular references
Design a JSON Serialization/Deserialization Strategy With Cycles and Determinism You are designing a JSON-based serializer/deserializer for a graph of...
Design async batched key-value fetcher
Design an async, batched key-value fetcher with a 100 ms window Context You have a single-threaded, event-loop environment (e.g., JS/TS). A backend en...
Present project and answer behaviorals
Behavioral & Leadership Project Presentation (Software Engineer) You are interviewing onsite for a Software Engineer role. Prepare a slide-style narra...
Debug a cache incident end-to-end
Incident Scenario: Elevated Latency and Surge in Cache Misses You are paged for elevated tail latency and a spike in cache misses in a microservice th...
Design a violation log analyzer
You are given an append-only list of violation events as tuples (id: string, policy: string, date: ISO-8601 string). Build an in-memory "Violation Log...
Design an Editable Text Buffer
The interview question was asked in three progressive stages. Design an in-memory text editor. 1. Basic text buffer Implement a data structure that ...
Solve linked list, string filtering, and puzzle
Coding & Algorithms (3 tasks) 1) Find the 5th node from the end (singly linked list) You are given the head pointer of a singly linked list. - Return ...
Format text into fixed-width justified lines
You are given an array of strings words (each string is a word with no spaces) and an integer maxWidth. Return a list of lines (strings) that formats ...
Implement an in-memory file system
Implement an in-memory file system supporting basic directory and file operations. You must support the following methods (names are illustrative; any...
How would you build an image classifier with dirty data?
Scenario You are asked to build an image classification model (single-label, multi-class) for a product team. The image dataset is known to be dirty (...
Introduce yourself and explain your project
Behavioral questions 1. Introduce yourself (education/background, current role, what you focus on). 2. Where are you from? (brief personal background ...