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."
Design demand-side ads relational tables
You are designing the core relational data model for a demand-side advertising system. Create a normalized schema (tables + key columns + relationship...
Optimize least-k revenue queries for read/write load
Follow-up Scenario Now assume revenue is not provided as a flat list of events, but may be nested, for example: - Each customer has many orders, and e...
Design a Ride Scheduler
Design an object-oriented scheduler for a single autonomous vehicle. The vehicle starts at a known location at time 0. Ride requests arrive in input o...
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...
Debug GPU Resource Allocation
You are given a small codebase for a GPU resource manager. The repository includes a README, logs, and unit tests. Your task is to use the failing tes...
Explain DB concurrency, debugging slowness, DDD and CQRS
Backend fundamentals: concurrency, performance investigation, and architecture terms Answer the following backend questions: 1. How do databases handl...
How do you review a design document?
You have an interview on your agenda titled “Design Doc Review.” You are given a written design document for a new feature/service (or a major change ...
How do you conduct a code review exercise?
In a live interview, you are shown a short code change — a diff, a pull request, or a standalone function — and asked to produce written code review c...
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...
Explain Compiler Pipeline and LLVM Backend
You are interviewing for a compiler engineer role. Explain the major stages of a modern compiler, then discuss common optimization techniques and how ...
Optimize a dispatcher’s scheduling data structures
Algorithmic analysis / code review: Dispatcher for memory-constrained scheduling You are given a single-threaded in-memory dispatcher that reacts to t...
Build an OAuth-based data migration client
Prompt Build a small command-line program that migrates records from a legacy HTTP API to a new HTTP API. Required steps 1. Obtain an access token usi...
Model Direct-Sold DSP Orders
Design a data model for tracking a direct-sold demand order in a demand-side advertising platform. Context: - The platform manages advertiser demand a...
Investigate High Memory Usage
You are the on-call engineer for a delivery platform. System context - Couriers use a mobile app to accept and complete deliveries. - The mobile app c...
Design poker-like hand comparison with custom ranking
Problem Design an object-oriented solution to compare two players' hands in a card game similar to poker. You are given two hands (each a fixed number...
Improve concurrency beyond a single lock
You are given a simple multi-threaded component that protects all shared state with a single mutual-exclusion lock (mutex). Scenario A service has man...
Design a multithreaded event logger
Design a multithreaded in-memory event logger for a server application. Requirements: - Many worker threads running in the process need to log events ...
Process Sharded Login Logs
You are given user login event logs generated by many servers across multiple regions. The logs are sharded by server or region, so no single machine ...
Debug a slow concurrent network server under load
Scenario You are on-call for a high-throughput network service (e.g., a TCP/HTTP server). Under load, users report: - Throughput suddenly drops - p99 ...
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...