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."
Describe conflict resolution and leadership
In a senior software engineering phone screen, you may be asked several behavioral questions around collaboration, conflict management, and leadership...
Solve tree view and parentheses cleanup
Solve the following two algorithm problems. 1. Right-side view of a binary tree Given the root of a binary tree, return the values of the nodes that w...
Describe Over-Engineering and UX Wins
After a project deep dive, the interviewer asked two behavioral questions: 1. Describe a time when you designed or implemented something that became m...
Solve Throughput, Rate Limiting, and LFU
The interview included the following coding tasks: 1. Minimum processing speed: You are given an array piles, where piles[i] is the size of the ith pi...
Compute peak parking lot occupancy intervals
You are given logs from a parking lot system. Each log entry has the form: [carId, time, eventType] - carId is an integer identifying a car. - time is...
Implement a Leaky Bucket Limiter
Design and implement an in-memory leaky-bucket rate limiter. A limiter is configured with: - capacity: the maximum amount of queued load the bucket ca...
Explain core Java and Spring fundamentals
Java and Spring fundamentals You are interviewing for a backend Java/Spring role. Answer the following conceptual questions: 1. Collections & data str...
Explain background, motivations, and stakeholder handling
Behavioral HR Screen: Software Engineer (Shopify) You are preparing for a first-round HR screen for a Software Engineer role. Provide concise, structu...
Explain a recent project and measured impact
Behavioral & Leadership: High-Impact Project Deep Dive You are interviewing for a software engineering role. Provide a concise, metrics-driven walkthr...
Design and scale a Yelp-like platform
System Design: Yelp-like Local-Business Reviews Platform + URL Shortener You are designing two systems: 1) A Yelp-like local-business reviews platform...
Sort and merge string lists by length
Given two unsorted lists of strings, return a single list sorted by ascending string length. Specify your tie-breaking rule for equal-length strings (...
Solve grid min path and sqrt by binary search
1) Given an m x n matrix of non-negative integers, find a path from the top-left to the bottom-right that minimizes the sum of cell values. You may on...
Design an online ads serving system
System Design: Low-Latency Targeted Ad Serving (≤100 ms E2E) You are designing an online advertising serving system for web/app inventory with a stric...
Implement a gig worker payout calculator
Implement a payout calculator for gig workers (e.g., delivery drivers). Given a list of completed orders with timestamps, distances, and tips, plus po...
Design viewing history and resume service
Design: Watched-Video and Resume Playback Service Context Design a backend service that records each user’s watched video list and lets them resume an...
Design an online marketplace for buying and selling
System Design: Online Marketplace Backend Context Design the backend for a two-sided online marketplace where sellers list items and buyers purchase t...
Implement a type-erased function wrapper
Implement a minimal std::function-like callable wrapper in C++ using type erasure via inheritance and a virtual call. Define a template Function<R(Arg...
Discuss key behavioral experiences
Behavioral Interview (Onsite) — Software Engineer You are preparing for an onsite behavioral and leadership interview. Answer the following prompts us...
Design a GPT chat UI with snapshots and sharing
System Design: End-to-End Web App for Interacting with a GPT-like Model Context You are designing a multi-tenant, browser-based SaaS application that ...
Design a high-throughput distributed rate limiter
Question Design a high-throughput, distributed rate-limiting service that runs across multiple regions with low latency and burst tolerance. The servi...