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."
Compute weighted sum of nested lists
Compute weighted sum of nested lists Given a nested collection that can contain integers or other nested collections, compute the depth-weighted sum w...
Determine reachability and minimum jumps
Determine reachability and minimum jumps Given an array of non-negative integers nums of length n, where nums[i] is the maximum number of steps you ca...
Design Minesweeper and Optimize Click Performance
Design a Minesweeper game. At game start, initialize an m×n board by randomly placing k bombs. Implement: ( 1) printBoard(): return a human-readable s...
Minimize sum with halving operations
Minimize sum with halving operations You are given an array of non-negative integers nums and an integer k. In one operation, choose any index i and r...
Convert integer to NAF form
Question Convert a given integer into its Non-Adjacent Form (NAF) representation such that no two non-zero digits are adjacent, and prove that the res...
Determine reachability and optimize task scheduling
Question LeetCode 780. Reaching Points: Given four integers a, b, c, d (1 <= a, b, c, d <= 1000). Starting from (a, b) you may repeatedly apply either...
Perform matrix Candy Crush elimination
Question Implement a function that, given an m × n integer matrix representing colored blocks (same integers = same color), performs one round of "Can...
Compute delay times in priority array
Question Given an array of integers representing task priorities processed from right to left, return an array where each element is the distance (ind...
Implement Card Validation and Recovery System
Question Design and implement a payment-card validation system supporting: Basic VISA validation (16-digit numbers starting with 4) using the Luhn che...
Implement bank balance operations
Question Design and implement a Bank account class that supports the operations Deposit(amount), Withdraw(amount), and CashBack(percent). Ensure balan...
Solve weighted pick and product except self
Question LeetCode 528. Random Pick with Weight LeetCode 238. Product of Array Except Self https://leetcode.com/problems/random-pick-with-weight/descri...
Solve non-repeating show substring
Question LeetCode 3. Longest Substring Without Repeating Characters – variant where the elements are show names instead of numbers. https://leetcode.c...
Maximize path score in DAG
Question Given a weighted directed acyclic graph (DAG) where each node v has a score w(v) and each edge (u→v) has a time cost t(u,v), starting from no...
Optimize file reading and expression DFS
Optimize file reading and expression DFS Given a large password file, build a program to read the required password(s) while minimizing memory usage. ...
Find concatenated words in list
Question LeetCode 472. Concatenated Words – Given an array of strings words, return all words that are concatenations of at least two shorter words al...
Compute balances and array queries
Question Given a list of transactions where each transaction has a userId and an amount (positive for credit, negative for debit), compute the final b...
Solve Number of Islands
Question LeetCode 200. Number of Islands – Given a 2D grid of '1's (land) and '0's (water), count the number of islands. Follow-up: implement the solu...
Solve string match and DashMart BFS
Question Implement a string-matching function that returns the first index of a pattern in a text (akin to LeetCode 28 Implement strStr()). 2) “Dash M...
Design test-run logging and query functions
Question Implement log(test_id, timestamp, status) to record a test run, where timestamps are strictly increasing across all test IDs. Implement get_m...
Implement test failure analytics APIs
Question Design a data structure that supports: log(testId, timestamp, status) — record the status ('pass'/'fail') of a test run; timestamps are stric...