Senior Technical Operations Engineer

Oracle

You are given an m x n grid where each cell can have one of three values: 0 representing an empty cell, 1 representing a fresh orange, or 2 representing a rotten orange. Every minute, any fresh orange that is 4-directionally adjacent to a rotten orange becomes rotten. Return the minimum number of minutes that must elapse until no cell has a fresh orange. If it is impossible, return -1. For example, consider the following grid: [[2,1,1], [1,1,0], [0,1,1]] In this case, the function should return 4 because it takes 4 minutes for all the fresh oranges to rot. As another example, consider the following grid: [[2,1,1], [0,1,1], [1,0,1]] In this case, the function should return -1 because the orange in the bottom left will never rot. Here's how the rotting process would proceed in the first example: Initial state: [[2,1,1], [1,1,0], [0,1,1]] After 1 minute: [[2,2,1], [2,1,0], [0,1,1]] After 2 minutes: [[2,2,2], [2,2,0], [0,1,1]] After 3 minutes: [[2,2,2], [2,2,0], [0,2,1]] After 4 minutes: [[2,2,2], [2,2,0], [0,2,2]] All fresh oranges are now rotten after 4 minutes. Write a function to solve this problem efficiently. Consider edge cases such as an empty grid or a grid with no fresh oranges initially.

Oracle

Let's say you've developed a new feature for a high-traffic e-commerce website. The feature allows users to save items to a wishlist. You've tested it thoroughly in your development environment, and it seems to be working perfectly. Now, you need to deploy this feature to the production environment, where thousands of users will interact with it simultaneously. Describe the steps you would take to safely and successfully deploy this feature to production.** What are the key considerations you'd keep in mind during each stage of the deployment process?** How would you monitor the feature's performance and identify potential issues after deployment?** What rollback strategies would you have in place if something goes wrong during or after the deployment?** For instance, would you use a blue-green deployment, canary release, or some other strategy? How would you handle database migrations, caching, and potential security vulnerabilities? What metrics would you track to ensure the feature is performing as expected and not negatively impacting the overall site performance? What tools would you use for monitoring and alerting? Finally, how would you communicate the deployment progress and any issues to stakeholders?

Oracle

Okay, let's imagine we're at a career fair, and you have about two minutes to introduce yourself to a recruiter. Keeping that timeframe in mind, could you provide a concise overview of your background, skills, and career aspirations? Think of it as your elevator pitch. For example, you might highlight your key accomplishments from previous roles, discuss your proficiency in specific programming languages or technologies relevant to the target position, and briefly touch upon your career goals and what you're hoping to achieve in your next role. What makes you a great candidate?