Senior+ Interview Questions
These are real interview questions reported by candidates interviewing at the senior+ level (E5/L5 and above) across top tech companies. Senior+ loops raise the bar in two places most: system design, where you're expected to drive the architecture and defend trade-offs, and behavioral rounds, where interviewers probe scope, ambiguity, and how you've led without authority. The coding bar stays high but matters less than your ability to reason about scale. Every question here was asked in an actual senior+ interview, and most come with a detailed model answer so you can see what a strong senior+ response covers — not just whether it's correct, but whether it operates at the right altitude.

"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 the Minimum Edge Score on a Path Between Two Cities
Find the Minimum Edge Score on a Path Between Two Cities An undirected road network contains n cities numbered from 1 through n. Each road is represen...
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...
Choose the Cheapest Round Trip
Choose the Cheapest Round Trip You are given two arrays of equal length. departure[i] is the cost of departing on day i, and return_cost[j] is the cos...
Demonstrate Senior Engineering Judgment
Prepare concise behavioral stories that demonstrate senior engineering judgment through difficult projects, competing priorities, disagreement, influe...
Evolve Cursor Pagination Without Breaking Clients
Debug bidirectional cursor pagination when many transactions share the same timestamp, then add amount sorting without breaking old clients. Define st...
Answer Netflix Culture Screen Questions
You are 7 years into your career and have just been contacted by a Netflix recruiter on LinkedIn for a Software Engineer role on an advertising team (...
Design a Distributed File System
This question evaluates design skills for large-scale distributed storage systems, testing understanding of distributed systems principles such as met...
Implement a Half-Open Interval Range Module
Implement a Half-Open Interval Range Module Implement a module that tracks subsets of the real-number line using half-open intervals [left, right). Pr...
Design a Ride-Sharing System (Uber-style Core Platform)
Design a Ride-Sharing System (Uber-style Core Platform) Design the core backend of a ride-sharing platform like Uber. Riders open the app, see nearby ...
Detect Recent Duplicate Records with Bounded Memory
Detect Recent Duplicate Records with Bounded Memory A time-ordered stream contains records [id, text, title, timestamp]. Detect records whose exact (t...
Staff Engineer Hiring-Manager Round: Platform Ownership, AI Adoption, and Cross-Team Influence
This question evaluates a candidate's ability to narrate scope, ownership, and cross-team influence at the senior or staff engineering level, using a ...
Design a Real-Time Asset Price Service
Design a near-real-time digital asset price service that evolves from one upstream provider to several. Cover normalized ingestion, source reconciliat...
Design Comment Prediction Ranking System
This question evaluates proficiency in end-to-end machine learning system design for predicting user engagement, specifically the probability of a use...
Build and Defend a Baseline Model from a CSV
You receive a CSV during a live interview and are asked to build a useful predictive model. You may use code-completion or agent tools, but you must d...
Design a "Future Best-Sellers" Prediction and Recommendation System
Design a "Future Best-Sellers" Prediction and Recommendation System An e-commerce platform wants a new feature on its category pages. A user selects a...
Estimate a Launch Impact with Difference in Differences
Estimate a regional product launch effect with difference in differences when retrospective randomization is unavailable. Define the estimand, test pa...
Rate Engineering Work Simulation Responses
This question evaluates situational judgment and behavioral leadership competencies in a software engineering context, focusing on ownership, communic...
Design an Ad Pacing System
Design an advertising pacing system for a large-scale video / streaming advertising platform. Advertisers create campaigns with budgets, flight dates ...
Design A Drive-Style Usage Quota Limiter
Practice a cloud storage system design question about enforcing drive-style usage quotas during uploads, deletes, retries, and concurrent operations. ...
Implement Bootstrap and Jackknife Estimates on a DataFrame
Implement bootstrap and jackknife uncertainty estimates for a statistic computed from a pandas DataFrame. Learn correct positional resampling, confide...