Principal Technical Operations Engineer

Oracle

Given an unsorted array of integers, find the length of the longest increasing subsequence. For example: Input:** [10, 9, 2, 5, 3, 7, 101, 18] Output:** 4 Explanation:** The longest increasing subsequence is [2, 3, 7, 101], therefore the length is 4. Another example: Input:** [0, 1, 0, 3, 2, 3] Output:** 4 Explanation:** One longest increasing subsequence is [0, 1, 2, 3]. Constraints: The array can contain duplicate numbers. The numbers are not necessarily positive. They can be negative or zero. Your solution should be as efficient as possible. Could you describe your approach and implement the solution? Consider the time and space complexity of your solution. In the first example, [10, 9, 2, 5, 3, 7, 101, 18], a longest increasing subsequence is [2, 3, 7, 18]. Note that subsequences are not required to be contiguous. Another longest increasing subsequence is [2, 5, 7, 101]. It is important to understand what increasing means. The numbers must be strictly increasing (e.g., 2, 3, 7 is increasing, but 2, 2, 7 is not). Another important point to note is that there may be multiple longest increasing subsequences, but your function should return the length of such a subsequence, not the subsequence itself.

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?