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."
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 ...
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...
Debug Metrics Computed Before Filtering
Debug Metrics Computed Before Filtering A metrics page accepts filters and returns both matching rows and summary metrics. Users report that the rows ...
Reason About Endianness, Ring Buffers, and Stack Behavior in Firmware
Reason About Endianness, Ring Buffers, and Stack Behavior in Firmware You are reviewing low-level firmware that receives binary records, buffers them ...
Plan a Safe Repository-Wide Identifier Migration
Plan a Safe Repository-Wide Identifier Migration You have a very large repository whose internal variables and function names use snake case. A conver...
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...
Build an LLM-driven text-game agent
This question evaluates a candidate's understanding of integrating large language models into interactive agents, including prompt design, game-state ...
Explain Modern Python Features and Ecosystem
This question evaluates a candidate's expertise in modern Python language features, the surrounding ecosystem of libraries and frameworks, GUI toolkit...
Design a Train Ticket Booking System
This question evaluates a backend engineer's competency in object-oriented design, SOLID principles, API and service design, data modeling, concurrenc...
Design a Ride Scheduler
This question evaluates object-oriented design, event-driven scheduling and simulation, state management for ordered task execution, API design, and h...
Explain storing files to disk with concurrency
This question evaluates systems programming concepts (OS I/O, page cache, fsync semantics) and Java concurrency mechanisms (thread-safety, synchroniza...
Explain reliability and runtime fundamentals
You may be asked several short technical-fundamentals questions such as: - In a Kafka-based batch consumer, how would you prevent a batch from being p...
Implement tail -n for a Very Large File
Implement tail -n for a Very Large File Design and implement the core of tail -n: given a seekable file and a non-negative integer n, return the final...
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 an LRU Cache with a Constant-Time Average
Design an LRU Cache with a Constant-Time Average Design an in-memory cache with fixed positive capacity. Keys are unique strings and values are signed...
Explain auth, key rotation, secrets, and incident response
This question evaluates a candidate's competency in designing service-to-service authentication, key rotation, secret management, and technical incide...
Explain Linux Command Execution, Filesystems, and Isolation
Explain Linux Command Execution, Filesystems, and Isolation Walk through the operating-system mechanisms behind common Linux commands and isolation ch...
Compare WebSocket, SSE, and long polling
You are building real-time features for a web application and the interviewer probes your networking fundamentals across several layers of the stack. ...
Design an Extensible Python File Parser
This question evaluates skills in designing extensible, modular file-parsing frameworks in Python, covering interface and API design, format detection...
Design a bus simulation metric
This question evaluates a candidate's ability to comprehend and navigate a large unfamiliar codebase, safely make targeted code changes, and design, i...