Senior+ Software Engineering Fundamentals 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."
Java, Spring & Kafka Fundamentals Deep-Dive
Java, Spring & Kafka Fundamentals Deep-Dive This is a rapid-fire fundamentals interview for a senior backend engineer working in the Java/Spring ecosy...
Walk Through an Agentic PDF Evaluation Codebase
Walk through an agentic PDF evaluation codebase, including architecture, deployment, data processing, embeddings, similarity, and state management. <d...
Build a Custom CompletableFuture: Async Primitive and Parallel Array Processing
You are asked to design and implement, from scratch, a simplified asynchronous "future / promise" abstraction in the spirit of Java's CompletableFutur...
Implement A Mobile Chat Interface In An Existing Codebase
You are given an existing mobile codebase and asked to implement a ChatGPT-style chat screen in about 40 minutes. Describe how you would read the proj...
Design and Implement an Idempotency Layer for Order Creation
Design an idempotency layer above an order creation service so duplicate client retries do not create duplicate orders. <details> <summary>Hint 1</sum...
Review Code for Memory Risks
You are the reviewer on a pull request that adds a new utility to a production frontend codebase. The utility deduplicates an array using an object as...
Troubleshoot a production server outage
You are the on-call engineer responsible for a production server for the next several days. Discuss how you would approach the following: - How would ...
Data Pipeline Reliability, Backfills, and Spark Optimization
You are interviewing for a senior data engineering role on an analytics and observability team. The interviewer asks a sequence of practical questions...
Explain Modern Python Features and Ecosystem
You are interviewing for a senior Python software engineering role. The interviewer is probing the breadth and depth of your Python knowledge: not jus...
Build Resilient Aggregation and Debug Routing
This onsite combined two software-engineering exercises: 1. Implement a service method that calls multiple mock downstream APIs, merges their response...
Design an Event Recommendation Engine
You are building an email marketing recommendation engine for a ticketing marketplace. The marketplace has many users and many events. The engine shou...
Design Transaction Data Quality Checks
You own data quality for the same credit-card transaction dataset. transactions | column | type | description | |---|---|---| | transaction_id | integ...
How do you conduct a code review exercise?
In a live interview, you are shown a short code change — a diff, a pull request, or a standalone function — and asked to produce written code review c...
Explain OOP design and API rollout
In one interview round, the discussion focused on practical backend engineering rather than pure algorithms. Discuss both of the following: 1. You are...
Design a Ride Scheduler
Design an object-oriented scheduler for a single autonomous vehicle. The vehicle starts at a known location at time 0. Ride requests arrive in input o...
Model Direct-Sold DSP Orders
Design a data model for tracking a direct-sold demand order in a demand-side advertising platform. Context: - The platform manages advertiser demand a...
Design an Extensible Python File Parser
In Python, design a pluggable file parsing framework that can process multiple file formats such as CSV, JSON, and XML. Requirements: - Expose a commo...
How do you interpolate in 3D?
Given two points in 3D space, p0 = (x0, y0, z0) and p1 = (x1, y1, z1), how do you compute a point between them using interpolation? Define the interpo...
Design a Train Ticket Booking System
Machine-coding exercise, 90 minutes. Design and implement a train ticket booking system. The implementation should be close to working code and should...
Explain hash map internals and edge cases
You are asked a “knowledge check” about hash maps (hash tables). Discuss how a typical in-memory hash map works and how you would reason about these e...