Depth System Calibration Engineer

Meta

You are given a binary tree. Write a function to flatten the binary tree into a linked list in-place. The linked list should be in the same order as a pre-order traversal of the binary tree. This means that for each node, the right pointer should point to the next node in the pre-order traversal, and the left pointer should be null. For example, consider the following binary tree: 1 / 2 5 / 3 4 6 After flattening, the tree should look like this: 1 -> 2 -> 3 -> 4 -> 5 -> 6 Each node's right pointer points to the next node in the pre-order traversal, and all left pointers are null. Clarifications: The function should modify the tree in-place. The pre-order traversal should be followed. The left pointers of all nodes should be set to null after flattening. Could you provide an efficient algorithm to accomplish this, and what is the time and space complexity of your solution?

Meta

Let's delve into the realm of networking. Imagine you are tasked with designing a network for a growing company with three distinct departments: Engineering, Marketing, and Sales. Each department has unique needs and security requirements. The Engineering department requires high bandwidth for data transfer and code compilation, the Marketing department needs access to various social media platforms and marketing tools, and the Sales department needs secure access to customer data and CRM systems. Furthermore, the company wants to implement a guest network for visitors. The network should be designed with scalability, security, and performance in mind. Considering these requirements, address the following: Describe the network topology you would choose and why. Explain the advantages and disadvantages of your chosen topology in this scenario. Outline the IP addressing scheme you would implement. Include subnetting details and justification for your choices. Discuss the security measures you would implement to protect each department's data and ensure network security. Elaborate on firewall rules, access control lists (ACLs), and intrusion detection/prevention systems (IDS/IPS). Explain how you would segment the network to isolate the guest network from the internal network. What specific technologies or configurations would you use to achieve this? Describe how you would ensure high availability and redundancy in the network design. What measures would you take to prevent single points of failure? Outline the routing protocols you would use and why. How would you configure them to optimize network performance and ensure efficient data delivery? Discuss how you would monitor and manage the network to ensure optimal performance and security. What tools and techniques would you employ for network monitoring and troubleshooting?

Meta

Let's explore your motivations for applying to Facebook. To give me a comprehensive understanding, please elaborate on the specific factors that attracted you to our company. Consider these points in your answer: Company Mission and Values: How do Facebook's core values and mission align with your personal beliefs and career aspirations? Provide specific examples of Facebook initiatives or projects that resonate with you and explain why. Company Culture: Describe your understanding of Facebook's work culture. What aspects of our culture appeal to you, and how do you believe you would contribute to maintaining and enhancing this environment? For example, have you heard about our emphasis on open communication, rapid iteration, or continuous learning, and how do these resonate with your work style? Specific Opportunities: Are there particular teams, roles, or projects at Facebook that excite you? Detail why you are interested in these specific opportunities and how your skills and experience would be a valuable asset to the team. For instance, are you drawn to our work in AI, VR/AR, or social networking, and what specific projects are you aware of that match your skillset? Growth and Development: What are your long-term career goals, and how do you see Facebook helping you achieve them? Discuss the opportunities for learning, growth, and professional development that you believe Facebook offers and how these align with your aspirations. Impact: What kind of impact do you hope to make at Facebook? Do you want to influence millions of users, solve complex technical challenges, or contribute to innovative products? Explain how you would like to make a difference and why you believe Facebook is the right place for you to do so. By providing a detailed and thoughtful response that covers these areas, you will give me a clear picture of your passion for Facebook and your potential to contribute to our team.