Interview Questions
Practice the exact questions companies are asking right now.
"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."
Find closest BST value and remove parentheses
Question LeetCode 270. Closest Binary Search Tree Value LeetCode 1249. Minimum Remove to Make Valid Parentheses (follow-up: achieve without using a st...
Solve 4 LeetCode algorithm problems
Question LeetCode 636. Exclusive Time of Functions LeetCode 253. Meeting Rooms II LeetCode 314. Binary Tree Vertical Order Traversal LeetCode 215. Kth...
Design Connect-N winner detector
Question Design a data structure for the Connect-N game: pieces are dropped into a column (occupying the lowest empty cell). Implement move(column, pl...
Design prefix-sum function and max stack
Question LeetCode 303. Range Sum Query – Immutable (design a reusable prefix-sum function) LeetCode 716. Max Stack (similar design question) https://l...
Solve various LeetCode data-structure questions
Question LeetCode 129. Sum Root to Leaf Numbers LeetCode 2089. Find Target Indices After Sorting Array LeetCode 270. Closest Binary Search Tree Value ...
Determine minimal substitutions and removals
Question Given a list of words, determine the minimum number of character substitutions required so that, in every word, no two adjacent characters ar...
Count changed nodes in N-ary trees
Question Given two N-ary trees (old and new versions) where each node has a key (string), value (int), and list of children, compute how many nodes ar...
Determine equality after limited swaps
Question LeetCode 1790. Check if One String Swap Can Make Strings Equal Follow-up: Given two strings, determine if they can become anagrams of each ot...
Find largest island area
Question Given a 2D grid of 0s and 1s, find the largest area of a connected group of 1s (island) using 4-directional adjacency; return that area. (Var...
Calculate area, flush probability, egg drops
Question Given two quarter-circles inside a 1×1 square (centers at bottom-left and top-right corners), find the exact area of their overlapping region...
Compare two string linked lists
Question Given two singly linked lists where each node stores one character as a string, determine whether the sequences of characters represented by ...
Solve array and list algorithms
Question LeetCode 315. Count of Smaller Numbers After Self LeetCode 23. Merge k Sorted Lists Design algorithm for Amazon Locker getPackage (retrieve p...
Solve classic LeetCode problems
Question LeetCode 215. Kth Largest Element in an Array LeetCode 249. Group Shifted Strings Variant of LeetCode 56. Merge Intervals extended to 2-D rec...
Implement basic calculator
Question LeetCode 227. Basic Calculator II – implement an arithmetic expression evaluator supporting +, -, *, / and integer operands https://leetcode....
Find lowest common ancestor
Question LeetCode 236. Lowest Common Ancestor of a Binary Tree — Given a binary tree, find the lowest common ancestor (LCA) of two given nodes. Follow...
Solve min window & animal conflicts
Question LeetCode 76. Minimum Window Substring: Given strings s and t, return the smallest substring of s that contains every character of t (includin...
Navigate maze via HTTP API
Question Implement a program that repeatedly calls a provided HTTP API which returns the next URL in a maze; continue following the URLs until reachin...
Implement bank account with cashback
Implement a bank account processor. Given an initial non-negative integer balance B and a list of operations (n up to 1e 5), apply each operation in o...
Implement a match-3 board resolver
Question Implement a match-3 board resolver (the core loop of a "candy crush"-style game). You are given an m×n grid of cells. Each cell holds a value...
Format messages with paginated suffixes
You are given a message string s and an integer width w. Split s into multiple chunks, preserving character order, and append a suffix "i/n" to each c...