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."
Explain core Java and Spring fundamentals
Java and Spring fundamentals You are interviewing for a backend Java/Spring role. Answer the following conceptual questions: 1. Collections & data str...
Explain Python, Java, and Memory Management
Discuss the practical differences between Python and Java as programming languages. Compare them in areas such as typing, runtime model, performance, ...
Design a bus simulation metric
In an AI-assisted interview, you are given an unfamiliar codebase of roughly 10,000 lines that implements a bus traffic simulation. You may use an app...
Troubleshoot a website outage with disk full
You are on-call for a production web service. Users report the website is down (timeouts/5xx). You are told the incident turns out to involve a full d...
Compute probability two arrivals meet within 15 minutes
Probability puzzle Two people plan to meet, but they arrive independently at a random time within the next 1 hour. - Person A’s arrival time is unifor...
Explain Vector, Linked List, and Polymorphism
In a C++ interview, explain the differences between a dynamic array container such as std::vector and a linked-list-based container such as std::list....
Explain GPS positioning and errors
Explain how GPS works at a high level. Your answer should cover how satellites and a mobile receiver estimate location, how signal propagation time is...
Design an extensible request Retryer
Problem You are building a small library component called a Retryer that wraps an operation (typically a network call) and retries it on failure. Requ...
Explain OS details and C++ standard differences
Interview prompt You are asked a few environment and language-knowledge questions: 1. Development environment - What computer do you use (e.g., Mac...
Explain how to make robust HTTP API calls
SWE Fundamentals: Making Robust HTTP Calls (Client/Service) You need to integrate with an external HTTP API (could be an internal microservice or a th...
Build a responsive grid of fixed boxes
Task (React/CSS) Render a list of square “boxes” on a page: - Initially there are 10 boxes. - Each box is 100px × 100px. - Boxes should lay out left-t...
Explain ACID and isolation levels
Explain what a database transaction is, define the ACID properties (Atomicity, Consistency, Isolation, Durability), and describe common transaction is...
Explain use cases for clock synchronizers
Assume you are designing a digital system with multiple clock domains. The clocks have different frequencies and unknown phase relationships. You can ...
Explain C++ alignment and ABI stability
You are interviewing for a senior C++ / systems role. The interviewer asks two low-level fundamentals questions: 1. C++ memory alignment and padding ...
Implement a thread-safe periodic job scheduler
Implement a thread-safe periodic job scheduler Problem: Periodic Job Scheduler (Concurrency) Implement a small in-process job scheduler that can run p...
Design a meeting scheduler API
Meeting Scheduler (OOD + data structures) Design and implement an in-memory meeting scheduler that stores existing bookings and can answer availabilit...
Clean up all Docker resources
Docker: Cleanup Task You are given a machine with Docker installed. Your task is to fully clean the Docker environment using Docker CLI commands so th...
Convert binary tree traversals to forest count
A binary tree has the following traversals: - Inorder: A, B, C, D, E, F, G - Postorder: B, D, C, A, F, G, E This binary tree is converted to an equiva...
How do you debug slowness and bugs?
The interviewer asked two practical engineering questions: 1. A web application's frontend is loading very slowly. Describe how you would diagnose the...
Explain iOS ARC and avoid retain cycles
iOS Memory Management (ARC) You have 10 minutes to explain iOS memory management under ARC. Cover the following: 1. How ARC manages object lifetime (w...