Senior Data Engineer, Commerce Product

Netflix

Given an m x n matrix, return all elements of the matrix in spiral order. Example 1: Input: matrix = [[1,2,3],[4,5,6],[7,8,9]] Output: [1,2,3,6,9,8,7,4,5] Example 2: Input: matrix = [[1,2,3,4],[5,6,7,8],[9,10,11,12]] Output: [1,2,3,4,8,12,11,10,9,5,6,7] Constraints: m == matrix.length n == matrix[i].length 1 <= m, n <= 10 -100 <= matrixi <= 100

Netflix

Design a thread synchronization function to access common resources. Imagine you have multiple threads that need to access and modify a shared data structure, such as a counter or a list. Without proper synchronization, race conditions can occur, leading to unpredictable and incorrect results. For example, two threads might try to increment the same counter simultaneously, resulting in only one increment instead of two. Your task is to design a function or mechanism that allows these threads to safely access and modify the shared resource. Consider the following requirements: Mutual Exclusion: Only one thread should be able to access the shared resource at any given time. Fairness: Threads should not be indefinitely blocked from accessing the resource (no starvation). Efficiency: The synchronization mechanism should not introduce excessive overhead that significantly impacts performance. Explain your design choices, including the type of synchronization primitive you would use (e.g., mutex, semaphore, condition variable), how it would be implemented, and how it would ensure mutual exclusion, fairness, and efficiency. Provide code snippets or pseudocode to illustrate your solution. Discuss potential issues such as deadlocks and how to prevent them. How would your design handle a scenario with a high number of threads contending for the resource?

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?