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."
Find Maximum Island Perimeter
This question evaluates grid traversal and connected-component analysis skills, focusing on reasoning about perimeters and boundary conditions in bina...
Find Earliest Fully Connected Time
This question evaluates a candidate's understanding of dynamic graph connectivity, time-ordered event processing, and state maintenance in graphs, inc...
Implement Multi-Level In-Memory Services
Implement the following independent multi-level in-memory service simulations. In an interview, you may receive one scenario and unlock the levels seq...
Solve checksum and dependency debugging tasks
This question evaluates skills in string processing, modular arithmetic-based checksum computation and mapping, plus debugging of feature enablement l...
Implement Dependency-Aware To-Do List
This question evaluates the ability to design in-memory data structures and algorithms for representing tasks with directed dependencies, manage state...
Evaluate Arithmetic Expressions
This question evaluates understanding and implementation of expression parsing, operator precedence, tokenization of numeric and operator tokens, and ...
Execute TTL Cache Operations with Fetch-on-Miss
Execute TTL Cache Operations with Fetch-on-Miss Implement a pure simulator for a TTL cache. The simulator includes put, get, delete, size, and a deter...
Implement Snapshot Iterator Without Order Guarantees
Design and implement a mutable collection that supports snapshot iteration. The collection stores unique values and supports the following operations:...
Find flush and straight groups in cards
You are given an array of strings cards, where each string represents a distinct playing card. Each card string has the format <rank><suit>: - rank is...
Return right and left side views of a tree
This question evaluates understanding of binary tree data structures and the competency to identify side views by reasoning about which node is visibl...
Split Markdown Into Header-Aware Chunks
Implement a function that splits a Markdown document into ordered chunks, where each chunk must not exceed a given size limit. A Markdown header is a ...
Solve Triangle Rows and Top Frequencies
You have 1 hour to solve both coding problems. Problem 1: Build an Additive Number Triangle Given an integer numRows, return the first numRows rows of...
Solve path and inventory problems
This question evaluates algorithmic problem-solving skills around numeric robustness and stateful stream processing, specifically testing reasoning ab...
Estimate expected comparisons in a BST
Estimate expected comparisons in a BST In a particular binary search tree, finding node A takes 1 comparison and finding node D takes 3 comparisons. W...
Reverse Linked List Groups
This question evaluates linked list manipulation, pointer/reference management, in-place iterative algorithms, and the ability to enforce O(1) extra s...
Replace Delimited Tokens in a String
This question evaluates string parsing, token recognition, and dictionary lookup competencies for robust text replacement, including handling malforme...
Schedule vector ops on heterogeneous cores
This question evaluates understanding of scheduling and load-balancing heuristics for heterogeneous processors, algorithmic complexity reasoning, and ...
Implement a size-bounded LRU cache
This question evaluates a candidate's ability to design and implement efficient data structures for capacity-bound caching, focusing on handling varia...
Debug a driver assignment bug
Given a service that selects the best delivery driver ("dasher") for an order, users report incorrect assignments. With a provided codebase and failin...
Implement a persistent sharded key-value store
Problem Implement a simple key–value store that persists data on disk. You must store the data in fixed-size shards, where each shard is saved in one ...