I recently had my on-site with Google and wanted to put together a clean, realistic walkthrough for anyone preparing. On-site write-ups are surprisingly rare, so hopefully this fills the gap. 🛫 Arriving at Google Google arranged the travel and hotel, so I flew in the day before. On interview day I showed up a bit…

📌 Problem Statement Imagine you have an RPC server that produces log entries and we’re analyzing it offline.There are two entries for each call: Your task is to efficiently determine if any RPC in the log timed out. You can assume your function receives two arguments: Example Input timeout: Input log: ID Timestamp Event Type…

You are given a 2-D grid representing two elevators (left elevator A, right elevator B).Each cell may contain a digit representing the number of people waiting on that floor for that elevator. Example grid: Legend: You are also given a query describing a request: Task Given the grid and a request in the format: Write…

You are given a list of users, each with a start time and an end time.For each time interval where the set of active users changes, output: Input Example Output Example Convert all start/end into events: Sort events and sweep from left to right.Maintain an active user set: Between consecutive event times, output a time…

Given a log file, find the top N most talkative users Parse each line, extract username and message, count words, aggregate per user in a map, sort by total word count (desc), return top N. Given a chat log, count how many words each user has spoken and return the top N most talkative users….

You have a list of meetings in your calendar with a start and end time. You are very busy, so meetings can overlap. You also have one “Do Not Schedule”(DNS) interval during which you don’t attend any meeting. Any meeting schedule that overlaps with a DNS slot is automatically cut such that it does not…

📌 Part A — Tree Islands Problem Question:In a tree of zeros and ones, an island is defined as a group of ones that are surrounded by zeros or are at the boundary of the tree. Example: Find the number of islands in the tree. In the above example, there are 4 islands. 📌 Part…

This task requires you to sort characters in a string by: ✅ Rules ✅ Approach This tests basic algorithm design and comfort with the language, without relying heavily on advanced libraries. The VOprep team has long accompanied candidates through various major company OAs and VOs, including OpenAI, Google, Amazon, Citadel, SIG, providing real-time voice assistance, remote practice,…

Warmup Section Imagine you have a robot that sends status messages that humans will read in real time.The raw messages are hard to read for a human because there are often many messages produced in short periods of time. One idea to make them more readable is to remove the duplicate messages over a 10-second…

Given an English-language text and the width of a page, find how many lines the text would take on that page. Given a text that you’d like to place into a two-column table on a fixed-width page, find the best column width that minimizes the overall table height. Subproblem 1 (line count): Given page width,…