Software Engineer Coding & Algorithms Interview Questions
Practice 2,265 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."
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 Knight and Reversal Problems
The online assessment contained two coding problems: 1. Generalized knight shortest path: Given an integer n, consider an n x n chessboard with coordi...
Find the Kth Largest in Two Sorted Arrays
You are given two arrays sorted in ascending order and an integer k. Return the kth largest element among all elements from both arrays combined. Coun...
Implement Calendar Layout and String Packing
The interview reportedly included two separate coding exercises: 1. Day-view calendar layout - You are given a list of events for a single day. Eac...
Implement Sliding-Window Rate Limiter
You are asked to build an in-memory rate limiter for an API service. For each user_id, allow at most limit requests during any rolling window of windo...
Aggregate loans and match repayments
You are building a loan servicing tool. You are given two datasets. Part 1: Aggregate raw loan records Each raw loan record has the following fields: ...
Implement Validation and String Compression
Implement the following two coding tasks. 1. CSV dataset validation You are given: - a multiline string representing CSV data; - a set of banned words...
Design a data structure for dynamic top‑K frequency
Design a data structure that maintains a multiset of integers and supports the following operations efficiently: Operations - insert(x): Add one occur...
Find Duplicate Files by Content
You are given a list of directory descriptions. Each description has the following format: root_directory file_name_1(content_1) file_name_2(content_2...
Optimize trade PnL table updates
You are asked to modify an existing class without changing its public API: `python class Table: def __init__(self, filters, times): pass ...
Implement Plurality and Runoff Voting
You are given a list of ballots for an election. Each ballot is an ordered list of distinct candidate names, from highest preference to lowest prefere...
Solve multiple algorithmic interview questions
Below are several independent coding tasks. For each task, implement a function that returns the required output. Assume: - Arrays/lists are 0-indexed...
Compute conflicts and minimum meeting rooms
You are given a list of meeting room booking requests. Each request is a half-open time interval [start, end), meaning it uses the room starting at st...
Implement matrix transpose and KV store
The phone screen for a Linux-oriented software engineering role included multiple coding tasks: 1. Transpose an n x n matrix Given a square matri...
Validate KYC CSV Records
Implement a function that validates business-verification records from a CSV-formatted string. - The first line is a header with exactly 6 comma-separ...
Solve Search Speed and String Product
You are asked to solve two coding problems. Problem 1: Find the Minimum Constant Processing Speed You are given an array piles, where piles[i] is the ...
Find minimum time to cross bridge with flashlight
A group of people must cross a bridge at night with one flashlight. The bridge can hold at most two people at a time. - If two people cross together, ...
Implement Prefix Search and Node Removal
This interview included two coding tasks: 1. Implement a prefix-search data structure for strings with two operations: insert(word) and count_with_pre...
Solve binary-tree reverse printing and LPS
You are given a binary tree node definition: - TreeNode { int val; TreeNode left; TreeNode right; } Answer the following two algorithmic questions. 1)...
Compare heap and stack memory
Compare heap and stack memory. Explain how each is allocated and freed, typical lifetimes of data stored there, access patterns and performance charac...