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."
Describe a decision with incomplete information
Describe a decision with incomplete information Behavioral: Decision-Making Without Complete Information (Machine Learning Engineer) Provide a specifi...
Build a Friend Recommender
This question evaluates proficiency in graph algorithms, recommendation system logic, input validation, metric design, and test-driven software implem...
Design and analyze pricing-page A/B test
AB Test Plan: New Pricing-Page Layout Context: You will run a 2-arm online experiment on a pricing page. The primary metric is user-level paid convers...
Calculate A/B sample size, CI, decision rules
A/B Test Design and Analysis: Signup Funnel You are designing and analyzing a two-arm A/B test for a signup funnel. Assume 1:1 traffic split and indep...
Demonstrate leadership in data-driven scenarios
Behavioral & Leadership Prompts for a Data Scientist (Onsite) Instructions: - Answer each prompt with a specific story using the STAR structure (Situa...
Implement web data fetch and storage tool
Problem You are asked to implement a small program that retrieves data from a remote web service protected by token-based authentication, parses the r...
Solve Tree Views, Columns, and Calculator
This multi-part question evaluates skills in binary tree traversal and view extraction, vertical column grouping and ordering of tree nodes, and parsi...
Design email ranking and summarization in Outlook
This question evaluates proficiency in designing end-to-end machine learning systems for personalized email ranking and abstractive summarization, enc...
Review an existing architecture for risks
This question evaluates an engineer's ability to perform an architecture review, identifying imminent scalability, reliability, operability, and secur...
Answer Leadership and Collaboration Prompts
This question evaluates leadership, collaboration, interpersonal communication, conflict resolution, adaptability, and self-reflection competencies wi...
Implement Cache, Undo, and DFS
This question evaluates implementation skills in data structures, algorithmic complexity, and state-management patterns by combining a timed in-memory...
Discuss compensation expectations and level
HR Screen: Compensation Expectations for a Senior Machine Learning Engineer Context: In an initial HR screen for a senior-level Machine Learning Engin...
Explain Multi-Armed Bandit Principles
Multi-Armed Bandits vs A/B Testing: Algorithms, Trade-offs, and Production Considerations You are designing online decision-making for a large-scale p...
Fix unclear delivery addresses
A customer does not receive a delivery because the delivery address is unclear. As a product or operations leader, explain how you would diagnose the ...
Find maximum follow depth using recursion
You are given a directed follows relationship representing a social graph: - Each record (follower_id, followee_id) means follower_id follows followee...
Can You Reach the Last Index?
This question evaluates a candidate's understanding of array traversal and reachability in sequences of jumps, along with the ability to reason about ...
Handle conflict and motivate engineering teams
You are interviewing for a Senior Software Engineer / Tech Lead role. The interviewer asks two related leadership questions: 1. Handling conflict ...
Analyze omitted-variable bias in regression
Omitted-Variable Bias, Heteroscedasticity, and Remedies Setup - True data-generating process (DGP): Y = β0 + β1·Temp + β2·Occupancy + ε - Assumption...
Design end-to-end regression for energy demand
End-to-End Daily Energy Prediction for Commercial Buildings Context You are asked to design and justify an end-to-end regression system that predicts ...
Demonstrate leadership under disagreement
Behavioral: Disagreeing on a Launch Under Deadline (Data Scientist) You are a Data Scientist interviewing onsite for a behavioral and leadership round...