Software Engineer Interview Questions
Practice 5,054 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."
Find users with access to all cameras
Given entities and relationships (user, owns, camera), (user, belongs_to, group), (group, owns, camera), and (group, belongs_to, group) where groups c...
Count expressions reaching a target sum
Count expressions reaching a target sum Given an array of non-negative integers nums and an integer target T, assign either a + or − sign to each numb...
Implement distinct islands and sliding maxima
Implement distinct islands and sliding maxima 1) Given a binary grid where 1 represents land and 0 represents water, count how many distinct island sh...
Generate the next lexicographic array arrangement
Generate the next lexicographic array arrangement Given an integer array nums (which may include negative numbers and duplicates), modify nums in plac...
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...
Design LCA with flexible inputs and rule
Design LCA with flexible inputs and rule Design a function to find the lowest common manager of two employees in an organizational tree. Support two i...
Compute binary tree diameter
Compute binary tree diameter Given the root of a binary tree, compute the tree's diameter defined as the maximum number of edges on any path between t...
Find power-of-two subarrays within sum range
Find power-of-two subarrays within sum range Given an integer array nums and an integer k, find all subarrays whose length is a power of two and whose...
Sort products by price and attention score
You are given a list of strings, each formatted as "product,price,attention". Parse the list into records and return the product names sorted to prior...
Describe std::string copy semantics
Describe std::string copy semantics In C++, what happens with std::string when you write: std::string a = "123"; std::string b = a; Describe which ope...
Minimize sum with halving operations
Minimize sum with halving operations You are given an array of non-negative integers nums and an integer k. In one operation, choose any index i and r...
Compute optimal locker placement with obstacles
Compute optimal locker placement with obstacles Given house coordinates H = {(xi, yi)} and tree coordinates T = {(xj, yj)} on a 2D integer grid, choos...
Sort a string by custom order
Sort a string by custom order Given a priority string P of distinct characters and a text string S, reorder S so that all characters appearing in P co...
Find buildings with rightward view
Find buildings with rightward view You are given an array of building heights aligned along a street that faces the ocean to the right. Return the ind...
Count users over n connections
Count users over n connections Given a stream of relationship events in the form [[user_a, user_b, op], ...], where op ∈ {"connect", "disconnect"}, tr...
Design a streaming median structure
Design a streaming median structure Design a data structure for a number stream that supports: add(num: int) in O(log n) time and median() -> float in...
Recommend movies by shared ratings
Recommend movies by shared ratings Write a function recommendations(user, ratings) that returns a list of movies to recommend to the given user based ...
Design Minesweeper and Optimize Click Performance
Design a Minesweeper game. At game start, initialize an m×n board by randomly placing k bombs. Implement: ( 1) printBoard(): return a human-readable s...
Apply sliding window techniques
Apply sliding window techniques Explain the sliding window technique and apply it to solve: ( 1) Given an array of positive integers and a target S, r...
Design image upload end-to-end
Design image upload end-to-end System Design: End-to-End Image Upload Pipeline Context Design an end-to-end system that handles user picture uploads f...