Software Engineer Interview Questions
Practice 4,360 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."
Explain Python, Java, and Memory Management
Discuss the practical differences between Python and Java as programming languages. Compare them in areas such as typing, runtime model, performance, ...
Solve BFS and grid tasks
The coding rounds included several algorithmic problems: 1. Threshold search with binary search: You are given floors 1..n and an API canOperate(floor...
Design a device configuration system
Design a system for about 1,000 admin users to manage configurations for about 1,000 devices. Admins need to update device configuration every day. Ex...
Find start indices of anagram substrings
You are given two strings: - s: the text string - p: the pattern string Return a list of all starting indices i such that the substring s[i : i + len(...
Determine if subarray sums to target
You are given an array of non-negative integers and a non-negative integer target. Determine whether there exists a contiguous subarray (continuous se...
Design a video-on-demand streaming service
Scenario Design a large-scale video-on-demand (VOD) streaming service similar to a major streaming platform. Users should be able to: - Sign in and br...
Design a URL shortener
Design a URL shortening service. The system should support: - creating a short code for a long URL - redirecting users from the short code to the orig...
Design a bus simulation metric
In an AI-assisted interview, you are given an unfamiliar codebase of roughly 10,000 lines that implements a bus traffic simulation. You may use an app...
Answer common HM behavioral prompts
Answer common HM behavioral prompts Behavioral & Leadership Prompts (Technical Screen — Software Engineer) Context: You are preparing for a hiring man...
Find Minimum Time Across a Grid
You are given an n x n grid of non-negative integers. Each value represents the earliest time at which that cell becomes traversable. You start at the...
Explain background and Salesforce motivation
Explain background and Salesforce motivation Behavioral: Background, Motivation, and Team Fit (Salesforce, GCP-Focused) Prompt Provide a concise, stru...
Implement a serializable key-value store
Implement in C++ an in-memory key-value store with: - put(key: string, value: string), get(key) -> optional<string>, erase(key). - serialize() -> vect...
Handle deadlines and misses
Handle deadlines and misses This is a two-part behavioral question. Answer both parts: 1. Tight deadline. Describe a time you faced a tight deadline. ...
Minimize total factory cost with distance penalties
You must choose construction options for factories to minimize a total cost. Input format: - options[i] is a list of options for factory i. - Each opt...
Design a ranking and recommendation system
Design a ranking + recommendation system for a personalized feed (e.g., short videos, posts, or products). Requirements Core goals - Given a user U, r...
Design first-time Kubernetes deployment in new cloud
Scenario You need to stand up a new compute cluster on a new cloud account/subscription (greenfield). The team wants a simplified, practical plan for ...
Design a Scheduler and Metrics Platform
Design a cloud-native job scheduling and metrics monitoring platform for a Kubernetes-like environment. The platform should allow internal users to su...
Implement sin(x) with precision constraints
Coding Question: Implement sin(x) Implement a function that returns an approximation of the trigonometric sine function. Function signature - Input: a...
Find shortest path in an OOP maze
You are working in a codebase that models a maze using object-oriented classes. The maze contains open cells and walls. You are given an entrance cell...
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...