Software Engineer Interview Questions
Practice 4,429 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."
Minimize total distance to a store
Question 1: Choose a CVS location to minimize total distance You are given an M x N grid grid containing only 0 and 1. - grid[r][c] = 1 means there is...
Determine whether a word exists in a letter grid
Given an m x n grid of characters board and a string word, determine whether word can be constructed from sequentially adjacent cells. Rules: - Adjace...
Compute balances with transaction fees and rejections
You are building a simple ledger. Inputs - A list of account names. - An initial balance for each account. - A list of transfer transactions, each wit...
Design an e-commerce category page
Design an e-commerce category page System Design: Category Page with Facets, Sorting, Pagination, SEO, Caching, Personalization, and Real-Time Updates...
Answer behavioral screen questions
Answer behavioral screen questions HR Screen — Behavioral Questions (Software Engineer) Context: You are interviewing for a Software Engineer role in ...
Debug and refactor a legacy module
Given a legacy module named DasherPicker and a failing test suite, systematically debug and refactor the code while following a provided review checkl...
Decide string transform with directional tokens and walls
Decide string transform with directional tokens and walls You are given two equal-length strings start and target of length n, each consisting only of...
Implement three interview-style coding tasks
You are given three separate coding tasks, all focused on algorithm and data-structure design. --- Task 1: Longest Bounded-Difference Subarray You are...
Discuss languages, packages, and tools you know
Skills and tooling question What languages, libraries/packages, and developer tools are you most comfortable with? In your answer, cover: - Primary la...
Merge overlapping time intervals
Problem You are given a list of closed intervals intervals, where each interval is [start, end] and start <= end. Merge all intervals that overlap and...
Explain Python internals and practices
Explain Python internals and practices Answer the following Python deep-dive questions: - Explain the Global Interpreter Lock (GIL) and its impact on ...
Simulate a two-player card war game
Simulate a two-player card war game Implement a function to simulate a two-player card game. Each player has a queue of card ranks (top at index 0), w...
Design tests to verify shuffle randomness
Design tests to verify shuffle randomness Experiment Design: Is Your Array Shuffle Truly Random? You're given a shuffle(arr) function that takes an ar...
Compute Latencies and Search Grid Path
You are given two coding tasks from an internship interview. Task 1: Compute Message Latency from CSV Logs Two systems, ComputeA and ComputeB, exchang...
Count vowel-only substrings with all vowels
Count vowel-only substrings with all vowels Given a lowercase English string s, return the number of contiguous substrings that ( 1) consist only of v...
Explain a graphics testing project in depth
Explain a graphics testing project in depth Behavioral: End-to-End Walkthrough of a Graphics Testing Project Context: You are interviewing for a softw...
Answer k-step ancestor queries in a rooted tree
You are given a rooted tree encoded as a parent array par[1..n] where: - Nodes are labeled 1..n. - par[i] is the parent of node i. - Exactly one node ...
Write a quarterly SQL report and a bash max-file script
Part A — SQL (conditional aggregation) You have two tables: - coins(coin_id, name) - transactions(id, coin_id, dt, amount) Write a query that returns ...
Design a max-stack with efficient operations
Design a max-stack with efficient operations Design a stack that supports push (x), pop(), top(), peekMax(), and popMax(). The popMax operation must r...
Find >n/3 elements in sorted array
Question Given a sorted (non-decreasing) integer array A of length n, return all distinct values that occur strictly more than n/3 times. Design an al...