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."
Classify concurrency anomaly between two transactions
Two transactions T1 and T2 run concurrently and access the same data item A. Their operations (in order of time) are: 1. T1 reads A = 100. 2. T2 reads...
Analyze TCP three-way handshake states
During TCP connection establishment (the three-way handshake), exactly one of the following statements is correct. Identify which one, and be prepared...
Plan QA testing for a new feature
Scenario You are the QA/Test Lead for a social app’s Friends page. A new feature is being added (e.g., new friend recommendation module, new friend re...
Explain Python tuples and typical usage
You are asked some Python fundamentals. 1. What is a tuple in Python? Describe its key properties (e.g., ordering, mutability, hashability). 2. How do...
Explain C++ containers, segfaults, and virtual dispatch
Answer the following C++ conceptual questions: 1. C++ standard containers implementation For common C++ standard library containers such as std::...
Explain worker state machine load balancer design
You are designing a lightweight load balancer for a Python-based backend service that dispatches tasks to a pool of worker processes. Describe how you...
Explain the MVC architectural pattern
Explain the Model–View–Controller (MVC) architectural pattern. Include in your answer: 1. What each component is responsible for: - Model - View...
Design an object-oriented queue and compare implementations
Design an object-oriented queue and compare implementations You are asked to design an object-oriented Queue abstraction and discuss how it can be imp...
Design a reusable web dialog component
You are building a UI component library for a web application and are asked to design and implement a reusable dialog (modal) component. Requirements ...
Explain what happens when you run ls
In Linux, explain the end-to-end flow of what happens when a user types ls in a shell and presses Enter. Include: - What the shell does - How the exec...
Identify incorrect statement about primary keys
In a relational database, which of the following statements about primary keys is incorrect? Options: - A. Every column that is part of the primary ke...
Solve cups logic puzzle with one true statement
There are 4 cups on a table. Each cup has a statement written on it: - Cup 1 says: All cups contain fruit candy. - Cup 2 says: This cup contains apple...
Choose unsuitable file structure for random access
When a file system must support efficient random access to records, which of the following physical file structures is not suitable for this scenario?...
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...
Discuss languages, packages, and tools you know
Skills and tooling question What languages, libraries/packages, and developer tools are you most comfortable with? In your answer, cover: - Primary la...
Evaluate Architecture and Capacity Trade-offs
Several interview prompts focused on architecture trade-offs and engineering fundamentals: 1. Music service deployment trade-offs: Compare a single-ho...
Write a quarterly SQL report and a bash max-file script
Part A — SQL (conditional aggregation) You have two tables: - coins(coin_id, name) - transactions(id, coin_id, dt, amount) Write a query that returns ...
Explain React and Firebase data interaction
Question You built a web app with React and Firebase. Explain how a React frontend typically reads/writes data with Firebase, and how you would struct...
Explain hash collisions and Java HashMap complexity
Explain hash collisions and Java HashMap complexity in a software engineering interview. Cover how hashing works, what a collision is, how a hash tabl...
Compare JavaScript == and === operators
In JavaScript, what is the difference between the == and === operators? Explain: 1. How each operator compares two values. 2. What type coercion is an...