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."
Design a circular queue data structure
Problem Design and implement a fixed-capacity circular queue that supports constant-time operations. A circular queue stores elements in an array of s...
Find top co-viewed products
You are given a list of user browsing sessions, where each session is a list of product IDs, a target_product, and an integer k. A product should be c...
Discuss integrity vs efficiency trade-offs
Discuss integrity vs efficiency trade-offs Behavioral: Balancing Integrity vs Speed Under Pressure (Software Engineer Onsite) Context You’re asked to ...
Evaluate arithmetic expression without parentheses
Evaluate arithmetic expression without parentheses Write evaluate(s: string) to compute the value of an arithmetic expression containing non-negative ...
Design a search autocomplete system
Design a Search Autocomplete System Design a planet-scale search autocomplete (type-ahead) service. As a user types into a search box, the service ret...
Implement a robust REST API method
Implement a robust REST API method Design and implement a REST API method to create a resource with idempotency Context You are building a create endp...
Detect and remove matched words in a char stream
You are processing a stream of characters (arriving one-by-one). You are also given a list of target words. Each time a new character arrives, it is a...
Solve two array and string problems
You will solve two independent coding tasks. Problem 1: Generate All Subsets of a Set You are given an integer array nums containing n distinct elemen...
Optimize password transform and discount scheduling
Optimize password transform and discount scheduling Part 1 — Transform to palindromic k-periodic string: Input: a lowercase string currentPassword and...
Diagnose failures via SSH and large logs
Diagnose failures via SSH and large logs Troubleshooting Large Logs Over SSH and Designing Centralized Logging Context You are on-call for a productio...
Solve common array/graph interview problems
You are given several independent coding tasks. Implement each function according to the specification below. 1) Rotate a square matrix in-place Input...
Detect words formed by multiple dictionary parts
Given an array words of up to 100,000 non-empty lowercase strings (total characters ≤ 1,000, 000), return all strings that can be formed by concatenat...
Discuss self-intro, location, pay, motivation
Question The opening segment of a Stripe Software Engineer technical screen is a structured conversation covering your background, motivation, logisti...
Build models for housing and wind power prediction
Two-Part Machine Learning Take-Home Part 1 — Binary Classification: "Can Buy" vs "Cannot Buy" Given applicant and market data, design a binary classif...
Design account opening workflow
System Design: Online Bank Account Opening Workflow Context You are designing a high-scale online bank account opening workflow for web and mobile cli...
Segment a message with width-constrained suffixes
Given a message string s and an integer width W, split s into consecutive segments and append a suffix "i/n" to each segment indicating its 1-indexed ...
Refactor rock–paper–scissors for config and ties
Refactor an existing Rock–Paper–Scissors tournament with three robot players so that the number of rounds is configurable and the system also tracks t...
Implement prefix and suffix file search
Implement data structures and APIs to store file names and support efficient queries that match both a given prefix and suffix. Provide methods add(na...
Design a packet reassembler API
Design a PacketAssembler API for Streaming Fragments Context and Assumptions - You are building a small component that assembles packets from a byte s...
Demonstrate culture fit with examples
Behavioral & Leadership Interview (Software Engineer Onsite) You are preparing for an onsite behavioral and leadership interview for a Software Engine...