Software Engineer Coding & Algorithms Interview Questions
Practice 2,595 real Coding & Algorithms interview questions for Software Engineer roles. From companies including Meta, Google, Amazon, Uber, Microsoft.
"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."
Solve LeetCode array & stream problems
Question LeetCode 346. Moving Average from Data Stream LeetCode 249. Group Shifted Strings LeetCode 163. Missing Ranges Remove duplicates from a chara...
Design Connect-N winner detector
Question Design a data structure for the Connect-N game: pieces are dropped into a column (occupying the lowest empty cell). Implement move(column, pl...
Solve classic LeetCode problems
Question LeetCode 215. Kth Largest Element in an Array LeetCode 249. Group Shifted Strings Variant of LeetCode 56. Merge Intervals extended to 2-D rec...
Design weighted random index picker
Design and implement a data structure that, given an array of positive integer weights w[0..n−1], supports pick() that returns index i with probabilit...
Design a hierarchical path registry
Design a hierarchical path registry Implement an in-memory hierarchical path registry. Support: create(path, value) to create a new path with an integ...
Find first 5-7-5 haiku in sentence
Find first 5-7-5 haiku in sentence Given a sentence containing mixed case and punctuation, and a syllable dictionary mapping lowercase words to their ...
Find max distance between alive tree nodes
Find max distance between alive tree nodes Given a binary tree, define alive nodes. Base case: alive nodes are the leaves. Find the maximum distance (...
Deduplicate a Linked List
Given a singly linked list, remove duplicate values in-place. Variant A (sorted list): delete repeated nodes so each value appears once using O( 1) ex...
Detect runs and answer suffix queries
Given an array of comparable elements a[0..m-1] and an integer N: 1) Write a function that returns the maximum length of any run of consecutive equal ...
Implement paginated retrieval of transactions
Implement paginated retrieval of transactions Given a large list of transaction records (id, userId, amount, createdAt), implement APIs to return tran...
Find k most frequent elements, discuss O(n)
Find k most frequent elements, discuss O(n) Given an integer array nums of length n and an integer k (where 1 ≤ k ≤ the number of distinct values in n...
Find latency pairs with minimal difference
Given an array of integers representing network latencies, return all increasing pairs [a, b] such that b − a equals the minimal absolute difference b...
Count clusters covered by dashers
Count clusters covered by dashers You are given two m×n binary matrices of equal size: D for dasher availability and U for user presence. A cell value...
Solve top-K and string rotation match
Solve top-K and string rotation match 1) Given an unsorted array of integers and an integer k, return the k largest elements in descending order. Impl...
Implement classes in existing abstract hierarchy
You are given an existing Python codebase that defines multiple classes, including abstract base classes using abc.ABC and @abstractmethod decorators....
Maximum Group of Pairwise Strangers in an Acquaintance Tree
You are given a social network of n people, labeled 0 through n - 1. For some pairs of people, it is known that the two people in the pair know each o...
Compute maximum currency exchange rate
Compute maximum currency exchange rate You are given a set of currencies and the direct exchange rates between some pairs of them. Each direct exchang...
Implement cheapest itinerary with date filters
Implement a function that computes the cheapest itinerary from a given origin to a destination using a list of flights, where each flight has (id, sou...
Explain Java DI, AOP, and transactions
Explain how dependency injection and AOP proxies are implemented in a modern Java framework such as Spring: bean lifecycle (creation, post-processing,...
Maximize funds with capital-gated projects
Maximize funds with capital-gated projects You start with initial funds W and may undertake at most K projects. Each project i has a required capital ...