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."
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...
Design a Checkers Game Simulator
Design and partially implement an object-oriented simulator for a two-player checkers-like board game. Requirements: - The game is played on an 8 x 8 ...
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 ...
Design a High-Card Game with a Persistent Tie Pot
Design a High-Card Game with a Persistent Tie Pot Model and implement a card game. A shuffled deck is split evenly among two players. In each round, e...
Choose lock granularity for concurrent storage
This question evaluates understanding of concurrency control and lock-granularity trade-offs in concurrent storage components, including coarse-graine...
Debug a slow concurrent network server under load
This question evaluates debugging and performance-tuning skills for concurrent network servers, focusing on event-loop behavior, I/O multiplexing, blo...
Implement A Concurrent Download De-Duplication Layer
Design and implement a downloader that accepts many URL download requests concurrently. Requests for different URLs should run independently. If sever...
Debug wrong DOM attributes in unknown framework
Frontend Debugging Plan: Incorrect DOM Attributes in an Unfamiliar Framework Context You join a team using an unfamiliar frontend framework. In the br...
Design an API for pay computation with retries
You’ve implemented logic that computes a dasher’s pay from order event logs (events include timestamps and state transitions). Design an HTTP API to e...
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...
Explain HashMap Resizing Without Long Pauses
Explain how a hash map works internally. Cover how keys are mapped to buckets, how collisions are handled, and when the table decides to resize. Follo...
Explain process vs thread and memory-sharing risks
This question evaluates a candidate's understanding of OS concurrency fundamentals, specifically the distinction between processes and threads, memory...
Answer core Python, CS, DB, and testing questions
This multi-part prompt evaluates core software engineering competencies including Python fundamentals (OOP, object/model behavior, iterators/generator...
Apply operations efficiently using Command pattern
This question evaluates skills in object-oriented design, the Command Pattern, correctness reasoning, extensibility of operation abstractions, and opt...
Extend and optimize an existing CLI tool
This question evaluates a candidate's ability to analyze an existing CLI codebase, perform gap analysis versus requirements, implement missing feature...
Design an LRU Cache with a Constant-Time Average
Design an LRU Cache with a Constant-Time Average Design an in-memory cache with fixed positive capacity. Keys are unique strings and values are signed...
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...
Answer OoO, caches, and memory-system questions
You are interviewing for a CPU/DV role. Provide clear explanations (and small worked examples where useful) for the following computer architecture to...
Build searchable list and highlight max transaction
UI Component: Filtered List With Max-Highlight Context Implement a small web UI component (e.g., in a modern frontend framework) that receives an arra...
Develop test plan and TDD for word search
Design a Comprehensive Test Plan and TDD Workflow for Word-Search Functions Context and Assumptions We are testing two grid-based word search function...