Software Engineer Interview Questions
Practice 4,229 real Software Engineer interview questions for 2026 — real questions from actual interviews with detailed solutions to speed your interview preparation. This collection reflects what top tech firms like Meta, Amazon, Google, DoorDash, and TikTok typically evaluate: rigorous coding and algorithmic problem solving, increasing expectations for end-to-end system design (including GenAI/LLM design at some teams), clear complexity analysis, and reliable engineering judgment under constraints. Expect a multi-stage pipeline: recruiter screen, timed or asynchronous coding assessments, one-to-more live coding rounds focused on data structures and correctness, system-design conversations for mid and senior levels, and behavioral/hiring-manager interviews that probe ownership and collaboration. To prepare, prioritize patterned practice (timed mock interviews and implementation + optimization), learn scalable design frameworks, rehearse concise trade-off communication, and tailor examples to company signals like Amazon’s leadership lens or product/latency focus at delivery and media-driven teams. Consistent, feedback-driven practice that combines problem-solving speed, clean code, and measured design reasoning is the quickest path to offers.
"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 basic banking system
Design a Basic Online Banking System with Safe Money Movements Problem Design a minimal but production-minded online banking service. The service must...
Explain Python and Web Basics
In a software engineering interview, explain the following fundamentals: 1. In Python, what are the differences between a list and a tuple? When would...
Design a ride-hailing platform like Uber
You are asked to design a large-scale ride-hailing platform similar to Uber. Requirements Functional requirements - Riders can: - Sign up, log in, a...
Design a distributed crossword solving service
You are asked to design a backend service that can solve crossword puzzles at scale. A single puzzle instance consists of: - A crossword board (grid) ...
Implement concurrent order-accept/pickup simulator
Concurrent restaurant order + pickup simulator Design and implement a thread-safe simulation for a restaurant that: - Receives incoming orders concurr...
Maximize capacity with primary-backup pairing
You are given n servers, where server i has memory capacity memory[i]. A valid system must contain an even number of servers. If the system contains 2...
Validate parentheses and find k-th largest
Problem A — Validate parentheses Given a string s containing only the characters '(', ')', '[', ']', '{', '}', determine whether the input string is v...
Answer Spring Boot and Thymeleaf engineering questions
Spring Boot + Thymeleaf (Engineering Questions) Answer the following interview questions with concrete debugging steps, best practices, and design cho...
How do you handle workplace conflict scenarios?
Answer the following conflict-focused behavioral questions. Use concrete examples from your experience. 1. Conflict with a peer: Describe a time you h...
Implement iterator merging lists with filtering
Problem Implement an iterator (or generator) that iterates over two input sequences: - favorites: a list of item IDs (or objects with an id field) - p...
Implement a blog feed with fetching and state
You are building a simple Blog Posts page (React). Implement the UI and client-side logic in incremental steps. Data model Assume each post has at lea...
Compute top-N items from log stream
Problem You are given application logs containing events with an itemId. Each log line may contain extra fields, but you can extract the itemId from e...
Match payments to invoices with fallback rules
You are given two datasets: - invoices: each invoice has invoice_id, date, amount - payments: each payment has payment_id, optional invoice_id (may be...
Implement an Alert Execution Engine
You are given an alert client API that provides alert configurations, metric query execution, and notification methods. Implement an alert execution e...
Build AI chat for spreadsheets
Design an AI chat interface for the spreadsheet product. A user can type natural-language commands such as: - "Sum all values in column K and write th...
Solve Watcher Simulation And Integer Conversion
You are asked to solve two independent coding tasks. Task 1: Count players that reach the finish There is a one-dimensional track with integer positio...
Detect robot state after movements
Detect robot state after movements Implement an algorithm to determine whether a robot following a given set of movement instructions ends in a valid ...
Solve message splitting and board crushing
Question LeetCode 2468. Split Message Based on Limit – Given a message string and a per-line width, split it into parts adding the suffix "<i/n>" (e.g...
Return right and left side views of a tree
Given the root of a binary tree, compute two “side views”: 1. right_view: the list of node values visible when looking at the tree from the right side...
Design an access control system (RBAC + resource-based)
Design an authorization system that supports both: - Role-Based Access Control (RBAC): users/groups have roles (e.g., Admin, Editor, Viewer) that gran...