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."
Discuss mutexes, memory alignment, polymorphism, idempotency
In this interview round, you are asked several conceptual software-engineering questions. Answer all parts clearly and concisely, using examples. --- ...
Debug a cache incident end-to-end
Incident Scenario: Elevated Latency and Surge in Cache Misses You are paged for elevated tail latency and a spike in cache misses in a microservice th...
Explain hash map internals and edge cases
You are asked a “knowledge check” about hash maps (hash tables). Discuss how a typical in-memory hash map works and how you would reason about these e...
Debug missing output in Python async HTTP flow
You are given a Python program intended to call two HTTP APIs in order, process the returned JSON, and finally print the computed result. However, whe...
Explain how you use AI tools in development
You’re asked about your AI experience in day-to-day software development: - What AI-assisted development tools have you used (e.g., code completion, c...
Explain key React concepts and error handling
This question evaluates competency in React fundamentals, including understanding of the Virtual DOM, Hooks usage, React 18 concurrent features, serve...
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 ...
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...
Review a PR for thread-safe request handling
This question evaluates understanding of thread-safety and concurrent programming, safe object and API design (immutability versus shared mutable stat...
Design an encrypted key-value store with login
Prompt Design a small key–value store that supports user login and ensures values are encrypted at rest using a user-provided password. You may assume...
Design an hourly call-agent scheduler
This question evaluates algorithmic scheduling, capacity planning, and time-windowed resource allocation skills, along with handling practical constra...
Review concurrent code quality
This question evaluates skills in concurrent programming, code review judgment, and software design by focusing on misuse of volatile, thread-safety w...
Implement debounced async autocomplete input
Implement debounced async autocomplete input Implement an Autocomplete Input Component (Frontend Technical Screen) Context Build an autocomplete input...
Explain variadic functions
Explain variadic functions Variadic Functions in Two Languages + Typesafe Variadic Logger Context Variadic functions accept a variable number of argum...
Explain AWS access control and frontend typing
This question evaluates cloud infrastructure and access control (EC2, S3 pre-signed URLs, IAM), frontend React fundamentals (hooks and common pitfalls...
Write SQL for top spender and non-spenders
This question evaluates SQL querying skills including aggregation and grouping, date/time windowing for previous-calendar-month calculations, joins an...
Design a Connect-Four-like board game
Design an object-oriented model for a turn-based, grid-based “drop token” board game similar to Connect Four. Game rules (define these precisely in yo...
Implement a React CRUD Table
Implement a React CRUD Table React CRUD Data Table — Build and Explain Context Design and implement a React application that renders a data table with...
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 ...