Software Engineer Interview Questions
Practice 4,429 real software engineer interview questions for 2026. Covers top employers like Google, Amazon, OpenAI, and Uber — real questions from actual onsites with detailed solutions — and is built for focused interview preparation. This collection emphasizes coding and algorithms first, then system design, performance, and role-specific domains so you can train the exact skills interviewers test. What’s distinctive: coding rounds still dominate at every company, Google often emphasizes algorithms and distributed-systems thinking, Amazon commonly probes scalable-services design and operational tradeoffs, OpenAI leans toward ML systems, model deployment and inference-scaling problems, and Uber typically asks real-time routing, geospatial and consistency challenges. Expect live coding, pair-programming, and whiteboard/system-design sketches. To prepare efficiently, drill medium-to-hard algorithm problems with time limits, practice end-to-end system design sketches focused on capacity and reliability, and rehearse concise behavioral stories that show ownership and impact.
"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 behavioral experiences and decisions
Explain behavioral experiences and decisions Behavioral Interview Prompts — Onsite (Software Engineer) Context You are preparing for the onsite behavi...
Design in-game payment wallet system
Design in-game payment wallet system System Design: In‑Game Currency Transfers and Analytics Context You are designing the in‑game currency subsystem ...
Explain career goals and cultural alignment
Explain career goals and cultural alignment Behavioral: Long‑Term Goals and Mission Alignment (Software Engineer, Onsite) Prompt You are interviewing ...
Show leadership and teamwork
Show leadership and teamwork Behavioral Leadership Question Context You are in an onsite software engineering behavioral and leadership interview. The...
Discuss project motivation and challenges
Discuss project motivation and challenges Project Deep-Dive (Software Engineer — Phone Screen) Prepare a structured deep-dive on one significant proje...
Find conflicting pair using black-box run()
Problem You are given a list tests of n distinct test cases (you can treat them as IDs or objects). You also have access to a black-box function: - ru...
Describe a recent project you led
Describe a recent project you led Behavioral Prompt: Project Leadership Walkthrough (Software Engineer) Provide a concise, end-to-end walkthrough of a...
Find minimal time to serve customers
Find minimal time to serve customers You manage a bank with k tellers; teller i takes serviceTimes[i] minutes to serve one customer and works continuo...
Compute nearest-exit distances in a grid
Compute nearest-exit distances in a grid You are given a 2D grid representing a building floor with three cell types: -1 for walls, 0 for exits, and a...
Implement a Task Processor
Design a task processor that supports two operations: - AddTask(task): add a new task. - ConsumeTask(): remove and return the id of the next task to e...
Implement stateful connection router simulator
You are implementing a simplified connection router / load balancer for a Jupyter-like multi-tenant server system. There are N target servers, indexed...
Describe failure, conflict, metrics, and AI lessons
The interview included several behavioral prompts with deep follow-up questions. Prepare clear STAR-style stories for the following: - Tell me about a...
Transform tree with subtree sum mapping
Transform tree with subtree sum mapping You are given the roots of two complete binary trees T1 and T2 that have identical structure (same shape and n...
Implement an article voting tracker
Coding: Article Voting Tracker Design and implement a data structure to track users’ votes (upvote/downvote) on articles. Operations Implement functio...
Can two names match with ≤2 swaps?
You are given two restaurant names represented as strings s and t of equal length (same character set, case-sensitive). In one operation, you may swap...
Design a Scalable Like Counter
Design a large-scale service that stores and serves like counts for content items. Requirements: - Users can like and unlike an item. - Product pages ...
Implement a Least-Recently-Used Cache
Design and implement an in-memory least-recently-used cache. Requirements: - The cache is initialized with a positive integer capacity. - Implement ge...
Solve BST and Grid Query Problems
Solve the following coding problems. Problem A: Find the kth largest value in a BST You are given the root of a binary search tree and an integer k. R...
Discuss mutexes, memory alignment, polymorphism, idempotency
In this interview round, you are asked several conceptual software-engineering questions. Answer all parts clearly and concisely, using examples. --- ...
Implement Kac ring with O(1) color and kstep
You are implementing a Kac ring dynamical system. Model - There are N positions arranged in a circle, indexed clockwise: 0, 1, ..., N-1. - Each positi...