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,…

Level 1 The basic level of the in-memory database contains records. Each record can be accessed with a unique identifier key of string type. A record may contain several field – value pairs, both of which are of string type. Function Definitions Examples Queries Explanations set(“A”, “B”, “E”) database state: {“A”: {“B”:“E”}} set(“A”, “C”, “F”) database state: {“A”: {“C”:“F”,“B”:“E”}}…

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,…

Companies like Google, Apple, Microsoft, etc. offer various services such as drive, photos, mail, and documents.Typically, they provide users with a single shared quota. For example, if you purchase a 100GB storage plan,all these services will consume capacity from the same quota bucket. Under the hood, such systems usually look like this: Applications and services…

Example: Matrix: Words: Output: [‘abe’] This problem asks you to check which of the given words can be found in a 2D character matrix. A valid word must be formed by adjacent characters in the matrix, typically in horizontal or vertical directions (depending on the interviewer’s clarification). The task is essentially a simplified version of…

SnowCal is a simple programming language used to perform calculations. A SnowCal program keeps a single integer X in memory, initially set to zero, and repeatedly performs addition and multiplication operations on it. Formally, the language has 5 operations: Write an interpreter that takes in the commands as an array of strings and returns the…