Software Engineer Software Engineering Fundamentals Interview Questions
Practice 260 real Software Engineering Fundamentals interview questions for Software Engineer roles. From companies including Bitkernel, Amazon, 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."
Simulate bus boarding with priority and wheelchairs
You are implementing a simplified bus boarding simulator. Model: - Person has at least: - id (string/int) - priority (boolean): if true, they shou...
How do you conduct a code review exercise?
In a live interview, you are shown a short code change (a diff or a function) and asked to write code review comments with minimal back-and-forth. Wha...
Design CSV upload endpoint with GPT classification
You are building a backend service that needs to process two CSV files and then call an external GPT-like API for classification. Requirements 1. HTTP...
Design a banking ledger for deposits/withdrawals
Banking/OO Design: Account Ledger Design a minimal in-memory or persistent component for a bank account system that supports: - deposit(account_id, am...
Design a deck of cards with shuffle/draw
Object-Oriented Design + Randomness Design an in-memory model of a standard 52-card deck. Requirements - Create classes to represent at least: - Car...
Fetch Public S3 Object Metadata
In Node.js, using AWS SDK for JavaScript v3, write a program that accesses the public S3 bucket coderbytechallengesandbox in region us-east-1 without ...
Design an extensible expense rule evaluator
Scenario You are building a corporate employee expense card product. Admins define policies (“rules”) to prevent misuse and to flag policy violations....
Debug a Project Assignment Codebase
You are given a multi-file codebase and several CSV fixtures that implement a project assignment workflow. The system assigns people to projects based...
Design several backend components
The interview note also referenced several low-level design and backend design questions. For each prompt, define the core APIs, data model, major cla...
Design a task management system with TTL
Task Management System (in-memory) Design and implement an in-memory task management system that supports tasks, users, task assignment with TTL (time...
How to debug a Python loop-condition bug
You are given a Python script that appears to hang or produce incorrect results because of a bug in a loop condition (e.g., while/for termination logi...
Implement a Vending Machine
Design and implement the core logic for a vending machine using object-oriented principles. The machine stores products, accepts bills, tracks the cur...
Answer OoO, caches, and memory-system questions
You are interviewing for a CPU/DV role. Provide clear explanations (and small worked examples where useful) for the following computer architecture to...
Design an ads retrieval service using a heap
Object-Oriented Design: Ads Retrieval (Priority-Based) Design a component that manages ads and supports retrieving the “best” ads based on a score. Re...
How would you improve AI-generated code?
During a pair-programming interview, you wrote the rover simulator code using an AI coding assistant. The code works for the basic examples, but the i...
Explain CPU-Bound vs I/O-Bound Work
Define CPU-bound and I/O-bound workloads. Then compare how multithreading, asynchronous I/O, and multiprocessing behave for each type of workload, esp...
Design an API for Pascal Triangle
Design an HTTP API that returns Pascal's triangle for a requested height. The server should return only numeric data, while the client is responsible ...
Explain Out-of-Bounds Bugs and Infinite Loops
You are given a C or C++ code snippet that behaves incorrectly. The root cause is an out-of-bounds memory access, such as reading or writing past the ...
Design a concurrent latency percentile tracker
Design a thread-safe LatencyTracker class that supports: 1. Recording samples - Input: timestamp (e.g., epoch millis) and latencyMs (integer millis...
Build a Reliable Streaming Chat UI
You are building a React-based chat interface where responses stream into the UI token by token in real time. Before writing code, explain how you wou...