Senior Quality Assurance Engineer – IC3

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 design a URL shortening service like bit.ly. Consider the following: Functional Requirements: The service should accept a long URL and generate a unique short URL. Users should be able to access the original URL by visiting the shortened URL. The service should track click statistics for each shortened URL. Non-Functional Requirements: The service should be highly available and scalable to handle a large number of URL shortening and redirection requests. Shortened URLs should be generated quickly. The system should be fault-tolerant. Considerations: How would you handle URL collisions (when the same short URL is generated for different long URLs)? How would you design the data storage? How would you optimize the system for read-heavy traffic (redirections)? How would you implement analytics and track clicks? Explain the architectural components, data model, algorithms, and scaling strategies you would use to build such a system. Provide specific examples for URL encoding and decoding. For example, how would you encode https://www.example.com/very/long/url/path into something like bit.ly/xyz123?

Oracle

Let's delve into your professional background. I'm interested in understanding the scope and impact of your previous experiences and projects. To begin, walk me through your resume, highlighting the roles and projects that you believe best showcase your skills and abilities relevant to this position. For each experience, please elaborate on the following aspects: Your responsibilities: What were your primary duties and tasks in each role? Technical skills utilized: Which programming languages, tools, and technologies did you employ? Project outcomes: What were the results or deliverables of your projects? Did you achieve specific goals or metrics? Challenges and solutions: Describe any significant challenges you faced and how you overcame them. What innovative solutions did you implement? Teamwork and collaboration: How did you collaborate with your team members and stakeholders to achieve project objectives? Furthermore, I'd like to hear about any personal projects or open-source contributions that demonstrate your passion for software development. Please provide specific examples that illustrate your problem-solving skills, coding proficiency, and commitment to continuous learning. Finally, are there any gaps in your resume that require further clarification? I want to get a thorough understanding of your professional journey and how it has prepared you for this opportunity.