You are given an array of integers representing the amount of money stored in each house.The houses are arranged in a line, and you cannot rob two adjacent houses. Return the maximum amount of money you can rob without ever robbing two adjacent houses. Example (Explanation: choose non-adjacent houses so the sum is maximized.) Use…

Amazon has web server logs from multiple hosts.Each log entry consists of: Example (conceptual): We want to find the 3-page pattern that is visited most frequently across all sessions. In the example, the sequence <cart, checkout, help> appears twice, so it is the most frequent 3-page pattern. Given logs in the form: Return the 3-page…

Convert a number to an Excel column, and convert an Excel column back to a number. In Excel, columns are labeled as: You are asked to implement two functions: You may assume: The VOprep team has long accompanied candidates through various major company OAs and VOs, including Google, Amazon, Citadel, SIG, providing real-time voice assistance, remote practice,…

Implement the Linux find command as an API. Your API should support searching for files that match: Assume the filesystem is represented as a tree-like structure of directories and files. Your job:Design and implement a find-like API that searches the file system and returns all files that satisfy the given filters. Do a DFS traversal…

You are given a (potentially large) list of words.Some words are compound words, meaning they are composed of two or more words that also exist in the same list. Example word list:[rockstar, rock, star, rocks, tar, stars, rockstars, super, highway, high, way, superhighway] Goal:Identify all combinations where a word can be decomposed into two or…

Given an array of integers, find the index of a local minimum. A local minimum is defined as an element that is strictly smaller than its neighbors.Formally: You may assume: Goal:Return the index of one such local minimum. Example: You must return the index of any element that is strictly smaller than both neighbors.Since adjacent…

Implement the function pow(x, n), which calculates x^n.Note that you cannot use any built-in functions that directly implement pow. Examples: Key Ideas: This approach tests understanding of recursion, divide and conquer, and edge case handling (e.g. negative powers, floating-point base). The VOprep team has long accompanied candidates through various major company OAs and VOs, including SnowFlake, Google,…

Your team is debugging a program’s performance. A tracing tool records all function calls and returns, producing a sequence of events.Your task is to analyze these raw traces and determine which call stack occurs most frequently.Finding the most frequent call stack will help identify where the main slowdown may be occurring. Input Output Call Stack…

Roblox has a marketplace with millions of items. A user can flag/unflag any item as a favorite (similar to Like/Bookmark).Goal: Design a system that can show the number of favorites each item has. User Stories / QPS targets Extra:– As a user, I want to list all items I have favorited — 50K QPS (Insert…

This question focuses on system design and scalability within the context of Roblox’s Game Detail Page.You’re asked to design how to efficiently display: while considering massive user scale (100M total, 10M concurrent). Key challenges include: Typical design solutions might involve: The VOprep team has long accompanied candidates through various major company OAs and VOs, including Roblox, Google,…