Software Engineer (L4), Content Engineering

Netflix

Could you explain what a deadlock is, providing a specific example to illustrate the concept?

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 went above and beyond for a client or customer. Describe the situation, the actions you took, and the positive outcome that resulted from your efforts. What was the context? What specific steps did you take to exceed their expectations? What were the results of your going the extra mile? For example, perhaps a client was facing a critical deadline and you volunteered to work overtime to ensure their project was completed on time and to a high standard. Or maybe a customer was experiencing a frustrating issue with your company's product or service, and you took the initiative to personally resolve their problem, even though it was outside of your usual responsibilities. Consider a situation where you identified a potential problem or opportunity that the client hadn't even considered, and you proactively developed a solution or proposal that delivered significant value to them. Did you receive any special recognition or commendation as a result of your efforts?