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."
Answer Culture and Project Questions
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Design a Neighborhood Newsfeed System
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Design a Stock Trading Platform
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Fix Thread-Safe Trigger Synchronization
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Infection Spread Simulation with Death Threshold
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Implement Employee Management and Expression Evaluation
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Implement Datacenter Router Commands
Implement process_commands(commands) -> list[str] for a datacenter router simulator. The input is a list of command strings, and the function must ret...
Design an Ad Assignment API
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Compute Plant Infection Time
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Explain How You Build Team Trust
In a leadership or behavioral interview for a Software Engineer role, the interviewer opens by saying they do not want to discuss technical details. I...
Design an ad frequency capping system
Design a real-time ad frequency capping system for an ads platform. When the ad server is deciding whether to show an ad to a user, it must enforce ca...
Design a REST API Abstraction Layer
Design a REST API Abstraction Layer (Internal Service-Client SDK) A company runs many application servers that call internal REST services. Today, eve...
Describe Deadline, Mistake, Problem-Solving, and AI Experiences
You are interviewing for a Software Engineer (Intern) role at Amazon, in an on-site loop of two back-to-back 60-minute rounds. Each round mixes a beha...
Design a Distributed Rate Limiter
Design a distributed rate limiter for a large-scale API platform. The rate limiter sits in front of backend services and decides, for each incoming re...
Describe Growth, Mistakes, and Obstacles
You are interviewing for a new-grad Software Engineer role at a Chicago-based firm. After a technical screen, you reach a behavioral round run by an e...
Design a news aggregator system
Rippling Onsite — Two Parts This Software Engineer onsite has two parts: a system design and a short coding follow-up. Both are below. Treat them as o...
Design a Layover Activity Recommendation App
You are designing a mobile app for travelers who have free time during an airport layover. The app should recommend useful activities the traveler can...
Fix a Corrupted Bootloader Instruction
You are given a bootloader program as a list of text instructions. Each instruction has an opcode and a signed integer value, such as plus +1 or jump ...