Software Engineer Coding & Algorithms Interview Questions
Practice 2,712 real Coding & Algorithms interview questions for Software Engineer roles. From companies including Meta, Amazon, Google, 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."
Build a hit/miss word guessing game
This question evaluates implementation skills in managing stateful systems and data structures for pattern matching, as well as algorithmic and advers...
Determine whether two nodes are related
This question evaluates understanding of graph representations, reachability and connectivity concepts for ancestry relationships, including handling ...
Coordinate workers across two exclusive targets
This question evaluates proficiency in concurrent programming and synchronization, focusing on safe resource coordination, mutual exclusion, utilizati...
Solve three string/stack/backtracking problems
This set evaluates proficiency with algorithmic patterns—stack-based and monotonic-stack reasoning for visibility problems, backtracking for combinato...
Implement a rate limiter at scale
This question evaluates understanding of algorithmic and system-level design for per-key rate limiting, including data structures, time/space complexi...
Print all odd numbers from an integer list
This question evaluates proficiency with array/list manipulation, parity checking, and handling edge cases such as negative values and integers outsid...
Count connected components in a binary grid
This question evaluates understanding of graph traversal and connected-components detection on a 2D grid, measuring the ability to model grid cells as...
Count islands by requested sizes
This question evaluates a candidate's understanding of grid connectivity, identification of connected components, and the ability to aggregate compone...
Group strings that are anagrams
This question evaluates skills in string manipulation, grouping by character composition, and the use of hashing or sorting techniques to construct ke...
Find longest run of identical consecutive shows
This question evaluates array-manipulation skills and the ability to identify contiguous runs of equal values, emphasizing algorithmic efficiency and ...
Dedupe titles in per-shelf viewport
You are rendering a streaming app home page. - The home page consists of shelves displayed from top to bottom. - Each shelf contains a list of titleId...
Detect overlap of two linked lists with cycles
This question evaluates understanding of linked list data structures, cycle detection techniques, pointer/reference identity, and algorithmic time/spa...
Implement a traffic-light UI with JS
Frontend Coding: Traffic Light Build a simple traffic light component using HTML + CSS + JavaScript. Requirements - Render a vertical traffic light wi...
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...
Process time intervals and detect overlaps/gaps
You are given n time intervals representing debug log segments. Each interval has a start time, an end time, and an associated text message. - Each in...
Remove Repeated Character Groups
You are given a string s and an integer k. Repeatedly remove any contiguous group of k identical characters. After a removal, the remaining parts of t...
Implement Social Graph Snapshot Queries
This question evaluates understanding of graph data structures, query-efficient indexing, and algorithmic trade-offs for static directed graphs, inclu...
Find a valid course order from prerequisites
This question evaluates understanding of graph algorithms, topological ordering, dependency resolution, and cycle detection within the Coding & Algori...
Implement a Hierarchical File System
Implement an in-memory hierarchical file system. Create a class FileSystem with the following methods: - FileSystem() initializes an empty file system...
Implement an LRU Cache
This question evaluates competency in designing efficient stateful data structures, understanding cache eviction policies (least recently used), and m...