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."
Validate word abbreviation and reconcile two abbreviations
Validate word abbreviation and reconcile two abbreviations Implement a function isValidAbbreviation(word: string, abbr: string) that returns true if a...
Find first unique character
Find first unique character Given a lowercase/uppercase alphanumeric string s, return the index of the first character that appears exactly once; if n...
Merge Two Insertion Diffs in Linear Time
A text-editing system represents changes to a document as insertion diffs. An insertion diff is a set of (position, value) pairs, where each pair mean...
Design a Fixed-Capacity Least-Recently-Used Cache
Design a Fixed-Capacity Least-Recently-Used Cache Design and implement a cache with a fixed maximum capacity that evicts the least recently used entry...
Maximum Currency Conversion Rate
Maximum Currency Conversion Rate You are given N currency exchange rate pairs. Each pair is a triple (from_currency, to_currency, rate), meaning that ...
Decode an Encrypted Paragraph Tree
Decode an Encrypted Paragraph Tree A document is stored as a tree of paragraphs. Each node holds a paragraph text — a string of lowercase English lett...
Snake Game: Minimum Moves to Reach the Apple
Snake Game: Minimum Moves to Reach the Apple You are simulating the classic Snake game on a grid with R rows and C columns. Cells are identified as (r...
Evaluate a Tokenized Arithmetic Expression
Evaluate a Tokenized Arithmetic Expression You are given an arithmetic expression that has already been tokenized for you — you do not need to write a...
Stack Machine Interpreter with Typed Int and String Values
You are building an interpreter for a simple stack machine. The machine has a single stack, and every value on the stack is one of exactly two primiti...
Determine Whether One Point Can Reach Another
Determine Whether One Point Can Reach Another You start at a point (sx, sy) with positive integer coordinates. From (x, y), one move may transform the...
Count Substrings with No Repeated Characters
Count Substrings with No Repeated Characters Given a lowercase English string s, return the number of nonempty contiguous substrings whose characters ...
Find the K Closest Points to the Origin
Find the K Closest Points to the Origin Given points, a list of distinct integer coordinate pairs [x, y], and an integer k, return the k points closes...
Remove All Adjacent Duplicate Pairs
Remove All Adjacent Duplicate Pairs Given a string s, repeatedly remove pairs of equal adjacent characters. A removal can make a new equal pair adjace...
Implement Adjacent-Line Uniq
Implement Adjacent-Line Uniq Implement the core behavior of the Unix-style uniq utility: combine consecutive equal lines into one run. The interview r...
Simulate a TTL Cache with LRU Eviction
Simulate a TTL Cache with LRU Eviction Implement a deterministic simulator for a cache that combines per-key expiration with a fixed-capacity least-re...
Recover a Rooted Tree from Depth-Annotated Preorder
Recover a Rooted Tree from Depth-Annotated Preorder A rooted, ordered tree was serialized by preorder traversal. Before each node value, the serialize...
Choose the Cheapest Round Trip
Choose the Cheapest Round Trip You are given two arrays of equal length. departure[i] is the cost of departing on day i, and return_cost[j] is the cos...
Report Where a Value Appears
Report Where a Value Appears Given a target and an even-length integer list, return four binary flags describing whether the target occurs: 1. at an e...
Compute a Point Set's Bounding Rectangle
Compute a Point Set's Bounding Rectangle Given two-dimensional integer points, return the smallest axis-aligned rectangle containing every point. Repr...
Implement Regular Expression Matching
Implement Regular Expression Matching Determine whether an entire input string matches a pattern containing lowercase letters and two special symbols:...