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 your most impactful project end-to-end
End-to-End Project Deep Dive (Behavioral) Walk through one recent, high-impact project you led or contributed to end-to-end. Cover the following: 1. P...
Solve and extend the Knapsack problem
You are given n items, each with an integer weight and value, and a knapsack capacity W. Implement 0/1 Knapsack to return the maximum total value and ...
Implement list, form, and API rendering with pitfalls
Take-home: Build a Small Frontend App (List + Form + API + A11y) Goal Implement a simple web app that demonstrates core frontend skills: rendering fro...
Design a subscription email scheduler with changes and renewals
Implement an email notification scheduler for subscription accounts. Inputs: - send_schedule: a mapping whose keys include: • "start": label to send...
Compute Remaining GPUs With Switching Limits
Suppose you manage n GPU clusters with fixed daily capacities capacity[i]. Each day starts fresh with the full capacity, because all GPUs are returned...
Count connected islands using Union-Find
You are given an m x n grid of characters where '1' represents land and '0' represents water. An island is a group of horizontally or vertically adjac...
Solve counting and frequency coding tasks
You are given two separate coding tasks. Task 1: Count valid “friend requests” You are given an array ages[] of integers representing users’ ages. A u...
Deduce row order from logic clues
Logic Ordering Puzzle: Four Coworkers in a Row Context Four coworkers—A, B, C, and D—are standing in a single row, left to right, facing north. Positi...
Count permutations with exactly n inversions
You are given two integers m and n. Consider all permutations of the array [1, 2, ..., m] (each number from 1 to m appears exactly once). A permutatio...
Describe leading an end-to-end client project
You are in a behavioral interview for a software engineering role. The interviewer asks you to discuss a full‑stack project you led end‑to‑end for a r...
Design a flight search platform
Design a large-scale flight search service similar to a consumer travel metasearch product. Users should be able to search one-way and round-trip itin...
Solve capital selection and grid escape
Solve capital selection and grid escape Implement two functions for algorithmic practice: 1) MaximizeCapitalAfterProjects(k, initialCapital, requiredC...
Describe projects and handle challenges
Describe projects and handle challenges Behavioral Interview Prompts — Software Engineer (Onsite) Context: In an onsite behavioral interview for a Sof...
Generate all subsets (handle duplicates)
Problem Given an integer array nums, return all possible subsets (the power set). Part A (no duplicates) Assume all elements in nums are distinct. Ret...
Find next greater element for subset
You are given two integer arrays query and nums. - All elements in nums are distinct. - Every element in query also appears in nums. For each value x ...
Discuss your proudest project
Discuss your proudest project Behavioral prompt — Your most impactful project Context You are in a behavioral/leadership interview for a Software Engi...
Design feedback and feature rollout platform
Design feedback and feature rollout platform System Design: Feedback + Feature Rollout Platform Context Build a multi-tenant platform that lets produc...
Compute nearest courier for each customer
Compute nearest courier for each customer You are given two sets of 2D points: customers C = {c1..cn} and active couriers (dashers) D = {d1..dm}. Each...
Implement ordering and undo executor
The interview included two coding tasks: 1. Dependency ordering: Given a set of tasks and their dependency relationships, return a valid execution ord...
Highlight Exact Source Matches
You are given a string text and a list of strings sources. For every exact occurrence of any string in sources within text, wrap the matched character...