Machine Learning Engineer (L5 - Senior) , Ads Inventory Management & Forecasting

Netflix

How can you execute threads A, B, and C in a specific sequence using multithreading?

Netflix

Design a Distributed Service Let's design a distributed service that can handle a large volume of requests while maintaining high availability and low latency. Consider a URL shortening service like TinyURL as an example. Specific Requirements: Functionality: The service should be able to: Accept a long URL and generate a unique short URL. Redirect users from the short URL to the original long URL. Scale: The service should be able to handle millions of URL shortening and redirection requests per day. Availability: The service should be highly available, with minimal downtime. Latency: The redirection from the short URL to the long URL should be as fast as possible. Storage: The service should efficiently store the mapping between short URLs and long URLs. Consider the Following Aspects in Your Design: Data Model:** How will you store the mapping between short and long URLs? What database technology will you use, and why? Algorithm for Short URL Generation:** How will you generate unique short URLs? How do you avoid collisions? System Architecture:** How will you distribute the load across multiple servers? What components will you use (e.g., load balancers, caches, databases)? Caching:** Where and how will you implement caching to improve performance? Fault Tolerance:** How will you ensure that the service remains available even if some servers fail? Monitoring and Alerting:** How will you monitor the health of the service and alert operators to potential problems? Walk me through your design, explaining the choices you make and the trade-offs involved. Be prepared to discuss alternatives and justify your decisions. For instance, why would you choose a relational database like MySQL over a NoSQL database like Cassandra, or vice versa? How would your design change if you needed to support custom short URLs?

Netflix

Tell me about a time you faced a significant ethical dilemma. What made it difficult, and what was the outcome? Describe the situation in detail, explaining the context and the stakeholders involved. Explain your thought process as you evaluated the ethical considerations. What alternatives did you consider, and why did you choose the path you did? What was the result of your actions, and what did you learn from the experience? For example, perhaps you discovered a colleague was misrepresenting their work or claiming credit for someone else's contributions. Or maybe you identified a potential safety issue with a product or service that your company was preparing to launch. Discuss how you navigated the situation, ensuring that your actions aligned with your personal and professional values, while also considering the potential impact on your team, the company, and other stakeholders. Explain how you communicated your concerns and the steps you took to reach a resolution, reflecting on whether you would approach the situation differently in the future.