Senior Engineer, Data Center (CA, OR, TX, or VA)

LinkedIn

Let's dive into C++ and networking concepts, followed by a concurrency coding challenge. Part 1: C++ and Networking Fundamentals Explain the difference between TCP and UDP. Provide examples of applications that would be best suited for each protocol. For instance, why is TCP preferred for web browsing, while UDP is often used for online gaming? Describe the OSI model. What is the purpose of each layer, and how does data travel from the application layer on one machine to the application layer on another? What are sockets? Explain how they are used to establish network connections in C++. Provide a simple code example demonstrating how to create a socket and listen for incoming connections. Explain the concept of network address translation (NAT). How does NAT allow multiple devices on a private network to share a single public IP address? Discuss different types of network topologies. What are the advantages and disadvantages of star, bus, ring, and mesh topologies? Part 2: Concurrency Coding Challenge Implement a thread-safe queue in C++. The queue should support the following operations: enqueue(item): Adds an item to the back of the queue. dequeue(): Removes and returns the item at the front of the queue. If the queue is empty, it should block until an item becomes available. size(): Returns the number of items in the queue. Your implementation should be robust and handle concurrent access from multiple threads without data corruption or race conditions. Explain the synchronization primitives you have used (e.g., mutexes, condition variables) and why you chose them. Provide a basic example demonstrating how multiple threads can enqueue and dequeue items from your thread-safe queue concurrently.

LinkedIn

Let's design the LinkedIn feed. Consider the user experience, key features, scalability, and personalization aspects. For instance, how would you prioritize content from connections versus suggested content? How would you handle different content types like text, images, videos, and articles? How do you design a system to ensure that the feed remains responsive even with millions of active users? How would you personalize the feed to show users content they are most likely interested in, and what data would you use to achieve this personalization? Finally, how would you prevent the spread of misinformation or harmful content within the feed?

LinkedIn

Describe a time you dealt with conflict. To provide a comprehensive answer, please consider the following aspects: The Situation: Clearly describe the situation where the conflict arose. What were the circumstances? Who was involved? The Conflict: What was the specific nature of the conflict? What were the differing opinions, goals, or perspectives that led to the disagreement? Be specific about the core issues. Your Role: What role did you play in the situation? Were you a direct participant in the conflict, or were you mediating between others? Your Actions: What specific steps did you take to address and resolve the conflict? This might include communication strategies, negotiation tactics, compromise, or problem-solving approaches. Provide concrete examples of your actions and dialogue. The Outcome: What was the result of your efforts? Was the conflict resolved successfully? What were the specific outcomes, and how did they impact the team, project, or organization? If the conflict wasn't fully resolved, what were the remaining challenges? Lessons Learned: What did you learn from this experience? How has it influenced your approach to conflict resolution in subsequent situations? What would you do differently if faced with a similar conflict in the future? For example, you could describe a conflict with a coworker over project priorities, a disagreement with a client about project scope, or a conflict within a team about different approaches to solving a technical problem. Detail the situation, your actions, and the ultimate resolution (or lack thereof), focusing on the skills you employed to navigate the disagreement.