Software Engineer Software Engineering Fundamentals Interview Questions
Practice 260 real Software Engineering Fundamentals interview questions for Software Engineer roles. From companies including Bitkernel, Amazon, 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 a Real-Time Top-K Ranking System
Design an object-oriented real-time Top-K ranking system. The system receives score updates for many entities, such as users, drivers, restaurants, or...
Design a Parking Lot
In an AI-assisted coding round, design the core object model and APIs for a parking lot system. The system should support: - multiple floors - multipl...
Design a Parallel Image Processor
You are asked to design an image-processing component. An image is represented as a 2D array of pixels, and the processor must apply one or more filte...
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 ...
Implement an Extensible Chatbot App
Implement a ChatApp class that processes user messages and bot responses. The system should support multiple bot types. The design must be extensible:...
Fix the Password Reset Workflow
You are given a small code repository that implements a password reset flow, but several bugs cause both the application and its tests to fail. The in...
Debug Validation Error Aggregation
You are given a Python validation library similar to Colander. A schema node can run multiple validators. Validators may raise validation errors, and ...
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 ...
Design a Cache with Hit Counts
Design a key-value cache that supports get(key), put(key, value), and delete(key). In addition, the cache must track how many successful reads each ke...
Explain OOP design and API rollout
In one interview round, the discussion focused on practical backend engineering rather than pure algorithms. Discuss both of the following: 1. You are...
Reconcile Records Across Sources
In an AI-assisted coding round, you are asked to reconcile records from multiple data sources. Each source contains person records with fields such as...
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...
Design an Extensible Python File Parser
In Python, design a pluggable file parsing framework that can process multiple file formats such as CSV, JSON, and XML. Requirements: - Expose a commo...
Design a multi-threaded synchronous log writer
Problem Design a log writer component that is called from multiple application threads and writes logs to a single file on disk. Requirements: - Calle...
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...
Model particle hits on a screen
A point source at (0, 0) emits particles toward an infinite vertical screen located at x = 1. For each particle, sample an angle theta uniformly from ...
Debug and Extend Cursor Queries
You are working in an AI-assisted coding interview. You may consult AI-generated suggestions, but you must validate them, explain your reasoning, and ...
How to prepare for AI-assisted coding interviews?
Scenario You’re invited to an onsite interview labeled “AI Code Craft Challenge”. - You will receive starter code (an existing small codebase). - You ...
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...
Simulate bus boarding with priority and wheelchairs
You are implementing a simplified bus boarding simulator. Model: - Person has at least: - id (string/int) - priority (boolean): if true, they shou...