Software Engineer Coding & Algorithms Interview Questions
Practice 2,306 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 Order Modification Feature
You are given an existing C++ trading system with a client/server architecture. The current system already supports two request types: - AddOrder(orde...
Flatten nested JSON into a string map
Problem You are given an input JSON object that may contain nested objects and arrays. Your task is to flatten it into a single-level key/value mappin...
Print a Centered Pascal Triangle
Given a positive integer height, generate the first height rows of Pascal's triangle and print them as a centered text triangle. Formatting requiremen...
Implement memcpy with misaligned addresses
Implement a C-style memcpy that correctly handles misaligned source/destination addresses. Task Write a function: `c void my_memcpy(void dst, const vo...
Solve these string, subset, and date problems
You are asked to solve multiple coding tasks. 1) Reverse word order in a string - Input: a string s containing words separated by spaces (may contain ...
Solve classic coding interview problems
Solve the following algorithmic problems: 1. Egg testing with limited resources: You are given k identical eggs and a building with n floors. An egg b...
Compute longest increasing subsequence length
Coding Question You are given an integer array nums. Return the length of the longest strictly increasing subsequence (not necessarily contiguous). A ...
Design hit counter for last 5 minutes
You are launching a new webpage and need a last-minute server-side metric to track popularity in real time. Implement a hit counter that supports the ...
Solve three C++ algorithmic tasks
Solve the following three C++ algorithmic tasks. For each, implement an efficient function and state time and space complexity. a) Diminishing prices ...
Solve Union-Find, Graph, and Stream Problems
Solve the following independent coding problems. 1. Merge Product Categories You are given a list of tuples (productA, productB). Each tuple means the...
Simulate and Construct Tournament Rankings
You are given a single-elimination tournament represented by an array of ranks. The array is a permutation of the integers 1..n, where a smaller numbe...
Build a Pivot Table Aggregator
Implement a function that builds a pivot table from a list of records. Each record contains a row_key, a column_key, and a numeric value. Requirements...
Find a split-stay booking across listings
You are implementing a simplified split-stay search. You are given: - A desired trip interval [start, end), where dates are represented as integers (e...
Compute nearest gate distance in grid
You are given an m x n grid representing a floor plan. - 0 = a gate - -1 = a blocked cell (wall/obstacle); cannot be entered - INF = an empty cell (a ...
Compute balances with transaction fees and rejections
You are building a simple ledger. Inputs - A list of account names. - An initial balance for each account. - A list of transfer transactions, each wit...
Find when failures started in log stream
You are given an array of log entries sorted by timestamp ascending. Each log entry contains: - timestamp (monotonic increasing) - status ∈ {OK, FAIL}...
Implement a debounced function (with leading option)
Problem Implement a debounce utility in JavaScript/TypeScript. Write a function: `ts function debounce<T extends (...args: any[]) => any>( func: T, ...
Bracket substrings matching any pattern
Problem You are given a sentence s (words separated by single spaces) and a list of strings patterns. For each word in the sentence, if the word conta...
Find balanced subarray and increasing tree path
You are given two coding problems. Problem 1: Longest balanced subarray (0/1) Given an integer array nums of length n where each element is either 0 o...
Determine validity after digit-constrained deletions
You're given a string S of length n consisting only of '(' , ')' , and digits '0'–'9'. For every digit at index i with numeric value v: ( 1) you must ...