Software Engineer Software Engineering Fundamentals Interview Questions
Practice 284 real Software Engineering Fundamentals interview questions for Software Engineer roles. From companies including Amazon, Bitkernel, Apple, Google, Uber.
"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."
Debug Watch List Movie Operations
You are given a full-stack Movie DB application. Users can log in, create, update, and delete watch lists, and add or remove movies from a watch list....
Design a Todo List Object Model
Design the object-oriented model for a todo list application. The product should allow a user to: - Create multiple todo lists or projects. - Create t...
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...
Debug Validation Error Aggregation
You are working in a Python schema-validation library modeled on Colander. A schema is a tree of nodes; each node can run multiple validators. When va...
Design a Real-Time Top-K Ranking System
Design an object-oriented, real-time Top-K ranking system. The system continuously receives score updates for a large set of entities — for example us...
Validate AI-Generated Code Safely
Generative AI coding tools are now part of many teams' day-to-day workflow, and interviewers increasingly want to know not just whether you use them, ...
Build a Durable Key-Value Cache
Design and implement an in-memory key-value cache backed by a write-ahead log (WAL) so that the cache survives process crashes. The implementation run...
Implement a Simple Memory Allocator
Design and implement a simplified memory allocator exposing malloc(size) and free(ptr) over a single fixed-size heap (a contiguous byte array). The al...
Implement Review Content Moderation
You are given an existing backend service for online reviews (Node.js/Express-style, with a persistence layer where a User model exposes await user.sa...
Implement a Unique Pointer and Vector
You are interviewing for a new-grad C++ software engineering role. Implement simplified versions of two common C++ standard-library abstractions, Uniq...
Explain Backend Infrastructure Fundamentals
You are in a backend / systems-fundamentals screen (the Chinese-tech "八股" style: rapid-fire conceptual questions where the interviewer probes the dept...
Design a 2048 Game
Design the object model and core game logic for a 2048 game on an N x N grid. This is an object-oriented design problem: focus on the classes, their r...
Design a Parallel Image Processor
Design an image-processing component that applies one or more filters to an image and produces a new image. An image is a 2D grid of pixels (with one ...
Design an extensible poker-hand evaluator
Design and implement an object-oriented solution for a simplified two-player poker-like game called Camel Cards. The interviewer is explicitly evaluat...
Implement an Extensible Chatbot App
Implement a ChatApp class that processes user messages and routes them to bot responders. The system must support multiple bot types, and the design m...
Reconcile Records Across Sources
In an AI-assisted ("AI coding") interview round, you are asked to reconcile person records across multiple data sources. Each source contains records ...
Java and Object-Oriented Design Fundamentals
Java and Object-Oriented Design Fundamentals This is a rapid-fire fundamentals round covering core Java language and collection semantics, the Spring ...
Fix Thread-Safe Trigger Synchronization
Implement a thread-safe one-shot trigger (a one-time event signal) in Python, then critique a buggy fragment a candidate proposed for it. The trigger ...
C++ Fundamentals: Memory, Compilation, and Containers
C++ Fundamentals: Memory, Compilation, and Containers This is a rapid-fire C++ fundamentals interview, of the kind used at low-latency / high-frequenc...
Build a GPU VM Fleet CLI
You are given a repository containing three mock cloud-provider servers that simulate GPU VM providers — Crusoe Cloud, Lambda Cloud, and Nebius AI Clo...