Software Engineer Coding & Algorithms Interview Questions
Practice 2,743 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."
Produce a Deterministic Course Plan
Produce a Deterministic Course Plan There are num_courses courses numbered 0 through num_courses - 1. Each prerequisite pair is [course, prerequisite]...
Solve a Two-by-Three Sliding Puzzle
Solve a Two-by-Three Sliding Puzzle You are given a 2 x 3 board containing the integers 0 through 5 exactly once. The value 0 is the empty square. In ...
Count Consecutive Positive Integer Sums
Count Consecutive Positive Integer Sums Given a positive integer n, return the number of ways to write n as a sum of one or more consecutive positive ...
Days Between Two Calendar Dates
Days Between Two Calendar Dates You are given two dates as strings, each in the format YYYY-MM-DD. Write a function that returns the number of days be...
Build an Ordered Latest-Quote Container
Build an Ordered Latest-Quote Container Implement a top-level operation runner for incoming stock quotes. At most one quote per symbol may be present....
Implement a Constant-Time Simple Moving Average
Implement a Constant-Time Simple Moving Average Implement a top-level operation runner for a simple moving average over a fixed-size window of the mos...
Implement Sliding Windows and LRU Cache
You are given two coding tasks. Task 1: Longest Subarray of Ones Given a binary array nums and an integer k, return the maximum length of a contiguous...
Implement Three Assessment Functions
An online assessment contains three independent programming tasks. Implement each function clearly and efficiently. 1. Compute coordinate bounds - ...
Implement Cache and Rotate Matrix
Solve the following two independent coding tasks. Task 1: Implement an LRU Cache Design a data structure LRUCache that stores integer keys and integer...
Implement a Least-Recently-Used Cache
Design and implement an in-memory least-recently-used cache. Requirements: - The cache is initialized with a positive integer capacity. - Implement ge...
Build a QuadTree From a Grid
Implement a compressed QuadTree for a square grid. You are given an n x n grid of values, where n is a power of two. The values are not limited to bin...
Determine Whether a Word Exists in a Character Grid
Given a 2D character grid and a word, return whether the word can be formed by moving horizontally or vertically between adjacent cells without reusin...
Maintain the First Value That Appears Exactly Once
Design a data structure that maintains a stream of integers and returns the first value that appears exactly once. Implement: `python class FirstUniqu...
Implement a Leaky Bucket Rate Limiter
Implement a leaky bucket rate limiter. You are given a class template for a rate limiter that controls whether incoming requests should be accepted or...
Solve Array, Matrix, and Recommendation Problems
During an onsite coding interview, solve the following independent tasks. Problem 1: In-place unique prefix You are given a nondecreasing integer arra...
Implement TTL Cache and Tree Balance Reporting
Complete both coding tasks. Task A: Time-limited cache Design and implement an in-memory cache where every key expires after a time-to-live duration. ...
Group Duplicate Files by Content
Group Duplicate Files by Content Given a snapshot of files, return groups of paths whose complete contents are identical. The interview report preserv...
Find the Highest-Cost Top-Level Job
You are given a local JSON file, jobs.json, containing an array of background job records. Each record has: - id: a unique job identifier - parent_id:...
Find Any Available Meeting Room
You are given multiple meeting rooms. For each room, the existing bookings are represented as a list of non-overlapping time intervals sorted by start...
Evaluate an Arithmetic Expression
Evaluate an Arithmetic Expression Implement a function that evaluates a valid arithmetic expression containing non-negative integers, the binary opera...