Sr. Staff Software Engineer, AI Infra

LinkedIn

You are given a string s and a dictionary wordDict containing a list of words. Determine if s can be segmented into a space-separated sequence of one or more dictionary words. You may reuse words in the dictionary. Solve this using backtracking. For example: Input:** s = leetcode, wordDict = [leet, code] Output: true (because leetcode can be segmented as leet code) Input:** s = applepenapple, wordDict = [apple, pen] Output: true (because applepenapple can be segmented as apple pen apple) Input:** s = catsandog, wordDict = [cats, dog, sand, and, cat] Output: false Implement a function wordBreak(s, wordDict) that takes the string s and the dictionary wordDict as input and returns true if s can be segmented into a space-separated sequence of dictionary words, and false otherwise. Explain the backtracking approach you employed, including the base cases and recursive steps. Focus on the efficiency of your solution and potential optimizations. For instance, can you improve performance by using memoization to store the results of subproblems? Analyze the time and space complexity of your solution, considering both the backtracking approach and any optimizations you might introduce. What are the limitations of using a pure backtracking strategy for this problem, especially with very long input strings? Explore how dynamic programming could be used as an alternative approach and discuss its advantages in terms of performance and scalability.

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

Let's walk through a past project you've worked on. I'm interested in understanding your approach, the challenges you faced, and how you overcame them. To start, please describe a project where you had significant ownership and responsibility. Elaborate on the project's goals, your specific role, and the technologies you utilized. For example, perhaps you led the development of a new feature for a mobile application using React Native, or you were responsible for optimizing a database query that was causing performance bottlenecks. As you describe the project, please highlight the key decisions you made and the rationale behind them. I'd also like to hear about any unexpected obstacles you encountered and the steps you took to address them. This could include technical challenges, team coordination issues, or changes in project requirements. For instance, how did you handle a situation where a critical dependency was deprecated, or when a team member was unable to complete their assigned tasks? Finally, I'm keen to learn about the outcomes of the project and how you measured its success. What were the key performance indicators (KPIs) that you tracked, and what were the results? Did you achieve the project's goals, and what lessons did you learn from the experience? Please provide specific examples and quantify the impact of your contributions whenever possible. This walkthrough will help me understand your problem-solving skills, technical expertise, and ability to work effectively in a team environment.