Software Engineer, Machine Learning

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Table: Sales +-------------+-------+ | Column Name | Type | +-------------+-------+ | sale_id | int | | product_id | int | | year | int | | quantity | int | | price | int | +-------------+-------+ (sale_id, year) is the primary key (combination of columns with unique values) of this table. product_id is a foreign key (reference column) to Product table. Each row of this table shows a sale on the product product_id in a certain year. Note that the price is per unit. Table: Product +--------------+---------+ | Column Name | Type | +--------------+---------+ | product_id | int | | product_name | varchar | +--------------+---------+ product_id is the primary key (column with unique values) of this table. Each row of this table indicates the product name of each product. Write a solution to select the product id, year, quantity, and price for the first year of every product sold. Return the resulting table in any order. Example: Sales table: +---------+------------+------+----------+-------+ | sale_id | product_id | year | quantity | price | +---------+------------+------+----------+-------+ | 1 | 100 | 2008 | 10 | 5000 | | 2 | 100 | 2009 | 12 | 5000 | | 7 | 200 | 2011 | 15 | 9000 | Product table: +------------+--------------+ | product_id | product_name | +------------+--------------+ | 100 | Nokia | | 200 | Apple | | 300 | Samsung | Output: +------------+------------+----------+-------+ | product_id | first_year | quantity | price | +------------+------------+----------+-------+ | 100 | 2008 | 10 | 5000 | | 200 | 2011 | 15 | 9000 | `

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Let's design a system for URL shortening, like TinyURL. Consider the following: Functional Requirements: Users should be able to enter a long URL and get a shorter URL. Users should be able to access the original URL by visiting the shortened URL. The system should be highly available and handle a large number of requests. Analytics: Track the number of times a shortened URL is accessed. Non-Functional Requirements: The system should have low latency for both URL shortening and redirection. The shortened URLs should be relatively short. The system should be reliable and fault-tolerant. Considerations: How would you handle collisions (when two different long URLs map to the same short URL)? How would you design the data store to efficiently handle a large number of URLs? How would you scale the system to handle a large number of requests? What algorithms could be used for generating the short URLs? Discuss the trade-offs. Walk me through the architectural components, data model, and scaling strategies for this URL shortening service. For instance, if a user inputs https://www.example.com/very/long/path/to/resource, the system might generate a short URL like https://short.url/xyz123. When a user visits https://short.url/xyz123, they should be redirected to the original URL.

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Tell me about your best project. To provide a comprehensive overview, please address the following points: Project Overview: What was the project's purpose and goals? What problem did it solve or what opportunity did it address? Who was the target audience or end-user? Your Role and Responsibilities: Describe your specific role within the project team. What were your key responsibilities and contributions? Did you lead any specific aspects of the project? If so, elaborate. Technical Details: What technologies, languages, and frameworks did you use? Describe the architecture and design of the system. Were there any interesting or challenging technical aspects? Challenges and Solutions: What were the major challenges you faced during the project? How did you overcome these challenges? Be specific about the solutions you implemented. Did you have to make any trade-offs or compromises? Explain why. Outcomes and Impact: What were the measurable outcomes of the project? How did the project impact the organization or its users? Did the project achieve its intended goals? Lessons Learned: What did you learn from this project? What would you do differently if you were to undertake a similar project again? How has this project influenced your approach to software development? For example, if you developed an e-commerce platform, you might discuss how you implemented a scalable microservices architecture to handle high traffic, or how you used machine learning to personalize product recommendations. Be prepared to discuss technical details, challenges you faced, and the impact your project had on the users or the business. Focus on projects where you played a significant role and can demonstrate your technical skills and problem-solving abilities.