Software Engineer Software Engineering Fundamentals Interview Questions
Practice 524 real Software Engineering Fundamentals interview questions for Software Engineer roles. From companies including Amazon, Google, Bitkernel, Apple, DoorDash.
"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."
Design unit tests for grid navigation
Mouse-Maze Controller: Design a Comprehensive Unit Test Suite Context (assumptions to make the task self-contained) Assume we are testing a controller...
Differentiate smart pointers and raw pointers
This question evaluates a candidate's understanding of C++ pointer semantics, ownership models, lifetime management, and memory-safety trade-offs betw...
Explain C++ default constructor generation rules
You are given a C++ class type T. 1. When will the compiler implicitly declare a default constructor for T? 2. When will the implicitly-declared defau...
Explain Python and React performance fundamentals
In a phone screen for a full-stack software engineering role, you may be asked a group of fundamentals questions such as: - Explain what a Python cont...
Explain Python and Web Basics
In a software engineering interview, explain the following fundamentals: 1. In Python, what are the differences between a list and a tuple? When would...
Implement a Thread-Safe Pub-Sub Service
Implement a simple server-side publish-subscribe system using Python's standard threading library. Requirements: - Multiple publisher threads may publ...
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...
Implement list, form, and API rendering with pitfalls
Take-home: Build a Small Frontend App (List + Form + API + A11y) Goal Implement a simple web app that demonstrates core frontend skills: rendering fro...
Array vs. Linked List: Differences and When to Use Each
In a technical screening round, the interviewer asks: What are the differences between an array and a linked list? When would you choose one over the ...
Aggregate transactions by status and failure reasons (SQL)
You are given a table transactions with (at least) the following columns: - transaction_id (unique identifier) - status (e.g., SUCCESS, FAILED, PENDIN...
Assess Spring IoC, AOP, JDBC, Security
Assess Spring IoC, AOP, JDBC, Security Spring Framework — Multi-part Questions Context: You are building/maintaining a Spring-based service for a take...
How to handle huge inputs?
In a coding interview, after solving an in-memory algorithmic problem, the interviewer asks: "What would you do if the input were extremely large?" Gi...
Explain C++ containers, segfaults, and virtual dispatch
This question evaluates a candidate's understanding of C++ language and runtime fundamentals — covering standard container implementations and perform...
Improve robustness of graph cycle detection code
You have written code to detect cycles in a directed dependency graph of services, where nodes represent services and edges represent dependencies bet...
How would you run a mentoring-focused code review?
Scenario You’re given a poorly written frontend code change (e.g., a React/TypeScript component + related state and API calls) authored by a junior en...
Optimize a core kernel for throughput
This question evaluates low-level performance optimization competencies, including loop transformations, memory-access patterns, vectorization, parall...
Explain Java ConcurrentHashMap and queues
An interviewer asks you conceptual questions about Java's concurrency primitives. Explain in detail: 1. How Java's ConcurrentHashMap is implemented in...
Describe Linux and SQL experience
You are being assessed on basic tooling skills as an engineer. Answer: 1. Linux/Unix commands: list commands you are comfortable with and briefly expl...
Review a JavaScript flatten PR
Live PR Review: JavaScript flatten using recursion You are reviewing a pull request that introduces a flatten utility. Intended behavior Implement fla...
Implement a reservation widget with pricing
Implement a Lodging Reservation Widget Context You are building a reservation widget for a property details page. The widget must let guests select da...