Research Engineer, Computer Vision - GenAI Evaluations

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Describe the difference between a stack and a queue. Provide an example of when you might use each data structure. Write functions to implement the push and pop methods for a stack and the enqueue and dequeue methods for a queue. Explain the time complexity of each of these operations. Additionally, discuss a scenario where you might need to implement a stack using a queue or a queue using a stack.

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Let's design a new feature for the Facebook app: Ephemeral Groups. These groups function like regular Facebook groups but with a key difference: all content (posts, comments, media) within the group is automatically deleted after 24 hours. The group itself remains, but the content vanishes. Imagine users creating groups for flash events, temporary project collaborations, or just sharing memes that are only funny for a day. Here are some considerations to guide our design: Use Cases: What are the primary use cases for Ephemeral Groups? Consider examples beyond those mentioned above. User Interface: How would users create and identify Ephemeral Groups within the existing Facebook app? How is it visually distinct? Data Storage: How would you efficiently store and automatically delete content to minimize storage costs and ensure compliance with the 24-hour expiration? Abuse Prevention: How do you prevent the misuse of Ephemeral Groups for sharing harmful or illegal content, given the disappearing nature of the data? Notifications: How would notifications work for Ephemeral Groups? Should users receive notifications for content that will disappear soon? Privacy: How would we make users aware of the ephemeral nature of the group and its content to manage their privacy expectations effectively? Scalability: How would this feature scale to handle potentially millions of Ephemeral Groups without impacting the performance of the overall Facebook platform? Walk me through your design proposal, addressing these considerations and any other relevant aspects you believe are important.

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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.