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."
Infection Spread on a Grid (Cellular Automaton)
This question tests a candidate's ability to implement and optimize a synchronous cellular automaton simulation on a 2D grid, assessing proficiency in...
Find the First Bad Version in a Monotonic Release History
Find the First Bad Version in a Monotonic Release History You are given a release history as a boolean array bad. Versions use zero-based indices. Onc...
Solve two array and string problems
You will solve two independent coding tasks. Problem 1: Generate All Subsets of a Set You are given an integer array nums containing n distinct elemen...
Implement custom iterator classes
Implement custom iterator classes In a blank coding environment (no IDE assistance, no autocomplete), implement an iterator abstraction entirely from ...
Terminal-Controlled Grid Rover Simulator
This question evaluates a candidate's ability to model stateful simulation logic, translating grid coordinates, heading rotations, and sequential comm...
Implement IP Address Arithmetic
This question evaluates proficiency in IP addressing, parsing and validation, binary/address-space arithmetic, CIDR subnet calculation, and formatting...
Simulate Transaction Lock Scheduling
This question evaluates understanding of concurrency control, lock scheduling, transaction state management, and queuing behavior in the Coding & Algo...
Solve Nearby Inventory and Word Segmentation Tasks
Two Algorithmic Tasks Implement both parts. They are independent and should have separate functions. Part A - Nearby Centers with Inventory An undirec...
Solve Three Coding Interview Problems
The interview included three coding tasks: 1. Common ancestor in an N-ary tree You are given the root of an N-ary tree and two target nodes. Dete...
Implement tail N lines
Question Implement a utility tail(path: string, N: int) (and an equivalent stream variant) that prints the last N lines of input without loading the w...
Implement streaming enrichment aggregator
This question evaluates competency in stateful stream processing, event-driven aggregation, in-memory state management, time-based expiry, and produci...
Wildcard Dictionary Matching
This question evaluates a candidate's ability to design custom pattern-matching logic beyond simple substring or regex lookups, handling both fixed-le...
Implement a search autocomplete suggestion service
This question evaluates proficiency in designing efficient prefix-matching and ranking mechanisms, including management of incremental query state and...
Return Top K Open Businesses
This question evaluates a candidate's ability to perform filtering and multi-criteria ranking, requiring correct handling of an open-status filter and...
Design a trie-based URL router with wildcards
Design a trie-based URL router with wildcards Implement a URL routing matcher that supports adding route patterns and matching request paths, using a ...
Minimum Path Length Through a Grid With One Allowed Cell Conversion
You are given an m x n grid grid where every cell holds either 1 (an open cell you may stand on) or 0 (a blocked cell). You start at the top-left cell...
Implement a FIFO Queue Using Two Stacks
Implement a FIFO Queue Using Two Stacks Implement a first-in-first-out (FIFO) queue using only two last-in-first-out (LIFO) stacks. The implemented qu...
Sum palindrome-change costs over all substrings
This is a three-part coding screen. Each part is independent — a string-algorithms problem, a SQL aggregation problem, and a shell-parsing problem — a...
Implement core puzzle/array/grid routines
You may be asked to solve one or more of the following coding exercises (write clean, testable code; discuss time/space complexity): 1) Jigsaw assembl...
Implement Price-Time Order Matching
This question evaluates understanding of limit-order book mechanics, priority-based matching, stateful stream processing, and data-structure managemen...