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."
Improve Reddit onboarding
How would you improve the onboarding experience for new users on a community platform similar to Reddit? Assume the goal is to help first-time users q...
How to evaluate new listing notifications?
You work on an online marketplace. The product team wants to build a feature that notifies buyers when new products are listed that match their intere...
Implement four string-processing functions
You are given four independent string/list problems. Implement each as a separate function. 1) Filter strings by shared characters Input: - words: a l...
Decide when CTR falls but revenue rises
Ads-Ranking A/B Test: Decision, Decomposition, Diagnostics, and Exec Readout Context You ran a user-level A/B test of a new ads-ranking model. The tre...
Improve low R² without p‑hacking
Predicting Contribution per Order with Low R² Context You are modeling contribution per order (a continuous per-order outcome such as margin or profit...
Summarize your background concisely
Behavioral Prompt: 60–90 Second Career Walkthrough (Data Scientist, HR Screen) Context You are interviewing for a Data Scientist role in a consumer-te...
Demonstrate leadership with concrete STAR examples
Behavioral & Leadership (Onsite) — STAR Examples With Metrics Provide succinct STAR-format examples (Situation, Task, Action, Result), with specific m...
Design theme-park profit model and bid decision
Theme Park Pricing and Land-Acquisition Case Context You manage pricing analytics for a Disney-like theme park. Baseline demand is steady. A land auct...
Explain AUC, activations, ensembles, and imbalance
Machine Learning Metrics and Modeling Choices — Multi-part You are given model scores and binary labels for a small dataset and asked to compute ROC A...
Estimate impact of global launch without holdout
Causal Lift Plan After a Global Launch Without a Holdout Background A new product feature was launched globally on 2025-05-10, with no control or hold...
Find duplicates in a list efficiently
Given a Python list that can contain integers (possibly negative) and may be very large, write code and explain approaches to find all values that app...
Design an experiment for order batching
Experiment Design: Two-Order Batching Policy During Peak Hours Context DoorDash plans to test a dispatch policy that allows a dasher to pick up two ne...
Compute feed ad frequency and retention in SQL
Assume today is 2025-09-01. Schema and tiny samples: feed_impressions(impression_id, user_id, impression_time, content_type, feed_position, session_id...
Design a tamper-evident video chain-of-custody audit system
Design a tamper-evident video chain-of-custody audit system System Design: Tamper-Evident Audit Logging for Video Evidence Chain of Custody Design a s...
Minimize maximum height along a grid path
You are given an m x n grid heights of distinct integers representing terrain heights. You start at the top-left cell (0,0) and want to reach the bott...
Introduce yourself and justify quant research fit
Behavioral Prompt: Self-Intro, Motivation, and High-Stakes Decision You are interviewing for a Software Engineer role in a quantitative trading resear...
Split Markdown Into Header-Aware Chunks
Implement a function that splits a Markdown document into ordered chunks, where each chunk must not exceed a given size limit. A Markdown header is a ...
Solve Grid Path and Graph Sampling
This interview note described two coding problems: 1. Grid path with shortest time and lowest cost You are given an m x n grid containing a start...
Maximize grid-path expression and count sawtooth subarrays
Problem 1: Maximize a valid expression along a grid path You are given an m x n grid grid. Each cell contains either: - an operator: '+' or '-', or - ...
Find k Smallest Pair Sums
Given two integer arrays nums1 and nums2, both sorted in non-decreasing order, and an integer k, return the k pairs with the smallest sums, where each...