Amazon SDE Intern Interview Experience — One Round to Decide Everything Amazon has started sending out OA invitations again recently. Over the past few weeks I helped several friends go through the process — and everything remains much the same as last year: OA format unchanged, interview setup consistent, and question types stable. Although the…

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…

Flight Booking (Python) This exercise provides a basic Python HTTP server used to track flight tickets and their prices.Your interviewer will explain the question; the README only contains usage hints.The main libraries include Flask (HTTP server) and psycopg2 (PostgreSQL client). Getting Started To start the database: Then, in another terminal: If psycopg2-binary fails to install,…

Problem 1 — Ticket Reservation API Design Codewriting How do you design the API/backend for a ticket reservation app?Examples include movie tickets or concert tickets.The app should allow users to hold their ticket(s) for 10 minutes before booking. Problem 2 — Third-Party Airline Booking APIs 3-party APIs Suppose we want to design an automated flight-booking…

📌 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…

Problem – Merge Overlapping CI Intervals Atlassian runs many CI pipelines, and we want to generate reports on usage to find cost-optimization patterns. Each CI pipeline starts at time X and ends at time Y. We are given a list of pipeline time windows: [[X₁, Y₁], [X₂, Y₂], …] Objective Find the list of non-overlapping…

Problem – Find Overlapping Pipeline Intervals Find all time intervals during which at least two pipelines are running at the same time. You are given a list of half-open or closed intervals (assume closed here) where each interval[start, end] represents the running time of one pipeline. Return all sub-intervals where the number of running pipelines…

The VOprep team has long accompanied candidates through various major company OAs and VOs, including Meta, Amazon, Citadel, SIG, providing real-time voice assistance, remote practice, and interview pacing reminders to help you stay smooth during critical moments. If you are preparing for these companies, you can check out our customized support plans—from coding interviews to system design,…

Triplet Card Game — AI Strategy Task You can see there is a 4×4 grid of cards, Ace through Nine.Each turn consists of picking up 3 cards which add up to 15 (Aces count as 1);these cards are then replaced from the deck. If you can’t pick up exactly 3 cards that add up to…

Question 1 You are asked to implement parts of a Naive Bayes classification algorithm from scratch, without using any libraries except numpy and math. Naive Bayes classification is based on Bayes’Theorem, predicting the probability that a set of data points belongs to one of several classes. A full Naive Bayes classifier consists of four major steps: You are given:…