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 a waitlist manager
This question evaluates object-oriented design and data-structure competency—modeling a FIFO waitlist API, managing unique party identifiers and edge ...
Choose DynamoDB vs MySQL for a backend
This question evaluates a candidate's ability to reason about data modeling, access patterns, query complexity, consistency and transactional requirem...
Analyze time complexity and threading trade-offs
Answer the following conceptual questions. 1) Worst-case time complexity State the worst-case time complexity (Big-O) for each operation and briefly j...
Compare C++ Pointers and References
Compare C++ Pointers and References Compare C++ pointers and references. Explain initialization, nullability, reseating, syntax, arithmetic, ownership...
Design employee and company classes with tests
This question evaluates object-oriented design, API modeling, and unit testing competencies by requiring an Employee and Company model, CRUD operation...
Fix race condition in concurrent deposit
Concurrent bank account debugging (thread safety) You are given a simple BankAccount object that is used concurrently from multiple threads. Two depos...
Fetch and Rank Articles from a Paginated API
Fetch and Rank Articles from a Paginated API Implement top_articles(limit) against a paginated HTTP endpoint. Page p returns JSON with data and total_...
Design an in-memory TODO list API
This question evaluates object-oriented design, API and data-modeling skills, including selection of in-memory data structures, performance considerat...
Design a shopping cart with coupons and tax
Design an object-oriented shopping cart module for an e-commerce system. Requirements: - A cart can add items and update item quantities. - The cart s...
Defend a Project's Schema, Indexes, and Concurrency Model
Defend a Project's Schema, Indexes, and Concurrency Model Choose one data-heavy service you have built and defend its data model under a detailed tech...
From Take-Home Script to Production: Python Trade-offs and Hardening a Data Job
From Take-Home Script to Production: Python Trade-offs and Hardening a Data Job You are in a software-engineering interview at a quantitative trading ...
Explain your database experience and debugging approach
This question evaluates a candidate's practical database engineering knowledge, concurrency debugging skills, and ability to integrate and verify AI-a...
Design an Extensible Rule Engine
Design an object-oriented rule engine that evaluates declarative rules against a record. The rule language must support comparison predicates such as ...
Explain Runnable vs Callable and thread-safe Singleton
This question evaluates a candidate's knowledge of Java concurrency and design patterns, specifically distinctions between Runnable and Callable, mech...
Design a concurrent latency percentile tracker
This question evaluates understanding of concurrent data structures, thread-safety, time-windowed metrics aggregation, and percentile computation for ...
Implement and Defend a Generic C++ Stack
Implement and Defend a Generic C++ Stack Implement a dynamically growing generic stack in C++ and then defend its object-lifetime and call-semantics c...
Explain how browser authentication works with JWTs
This question evaluates understanding of browser-based authentication with JWTs, covering token storage trade-offs, how tokens are sent with requests,...
Explain How You Would Test a System
Explain how to test a system by first defining its contract, invariants, risks, and trustworthy oracles. Build a layered strategy spanning unit, prope...
Diagnose Return Eligibility Scoring Bugs
You are working on an e-commerce return-eligibility service. For each return request, the service computes a risk score using signals such as: - how m...
Explain deadlock cases and how to prevent them
You are asked in an interview to discuss deadlocks in concurrent programming. 1) What is a deadlock? 2) What conditions must hold for a deadlock to be...