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."
Detect memory leaks in C++
Detect memory leaks in C++ C++ Memory Leaks: Detection, Integration, and Prevention You are building or maintaining a C++ service/library and need a p...
Explain Amdahl’s law and GPU matmul optimization
Answer the following systems/performance fundamentals questions (as in a GPU/ML infra interview). Assume a modern NVIDIA-like GPU architecture unless ...
Design matrix-operations HTTP service and test strategy
You are given a take-home assignment to build a small backend server. The goal is not algorithmic difficulty but demonstrating solid software engineer...
How would you run a mentoring-focused code review?
Scenario You’re given a poorly written frontend code change (e.g., a React/TypeScript component + related state and API calls) authored by a junior en...
Write SQL to compute current product stock
You need to generate a report showing the current on-hand stock for each product. Stock changes over time due to: - Incoming shipments (increase stock...
Design an object-oriented poker game
Design the object-oriented architecture for a command-line poker game. Requirements (clarify and state assumptions) Assume a standard 52-card deck (no...
Design an hourly call-agent scheduler
Problem You are staffing AI calling agents for a single day in Pacific Time (PT). Each customer must place a required number of outbound calls to thei...
Design a Rolling Event Counter
Design an in-memory rolling event counter. The counter should support two operations: - record(timestamp): record one event at the given timestamp, me...
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...
Trace first pass of heap sort
Given the integer array [7, 6, 3, 5, 4, 1, 2], you apply heap sort to sort it in ascending order using a max-heap implementation. After building the i...
Evaluate C for-loop execution count
In C, variables m and n are both of type int. Consider the following code: `c int m, n; for (m = 0, n = -1; n = 0; m++, n++) n++; ` In standard C ...
Improve robustness of graph cycle detection code
You have written code to detect cycles in a directed dependency graph of services, where nodes represent services and edges represent dependencies bet...
Implement an iOS scrollable grid with navigation
You are building a small iOS prototype in Xcode (Swift). You may use SwiftUI or UIKit. Implement a scrollable square grid of cells. Incrementally add ...
Design Historical Visit Tracker
Design an in-memory component that stores visit events of the form (visitor_name, timestamp) and supports historical queries. Requirements: - record_v...
Explain CI/CD, Kubernetes delivery, and troubleshooting
You are interviewing for a DevOps/SRE-style role. Answer the following practical questions: 1) What is CI/CD? Which CI/CD tools have you used and why?...
Write SQL for top spender and non-spenders
SQL Questions Assume the following schema: - users(user_id, created_at, ...) - transactions(txn_id, user_id, amount, txn_ts) - amount is a positive ...
Design a CI/CD release notification service
CI/CD Release Notifier (OOD) You are designing an object-oriented component for a service that performs an automated CI/CD release every day. Requirem...
Explain CSS specificity and selector precedence
Question Explain CSS specificity and how the browser decides which style rule wins when multiple selectors match the same element. Include: - How spec...
Design object model for an elevator system
Design the object-oriented model for an elevator (lift) system in a multi-floor building that may have multiple elevators. The system should support: ...
Design a basic credit card system
Design an object-oriented credit card system for a retail bank. Focus on clean class design rather than distributed infrastructure. At a minimum, the ...