Staff Software Engineer, Data Science

LinkedIn

Given a string s, find the length of the longest substring without repeating characters. For example: Input: s = abcabcbb Output: 3 Explanation: The answer is abc, with the length of 3. Input: s = bbbbb Output: 1 Explanation: The answer is b, with the length of 1. Input: s = pwwkew Output: 3 Explanation: The answer is wke, with the length of 3. Notice that the answer must be a substring; pwke is a subsequence and not a substring. Input: s = Output: 0 Implement an algorithm in your chosen language to efficiently determine the length of the longest substring without repeating characters in the given input string. Consider the time and space complexity of your solution. Can you optimize your approach to achieve the best possible performance, especially for very large input strings? What are the edge cases to consider, such as empty strings or strings with only one character?

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

Why do you want to intern at LinkedIn? LinkedIn is a company that deeply resonates with my professional aspirations and values. I'm particularly drawn to LinkedIn's mission of connecting the world's professionals to make them more productive and successful. I believe that technology can be a powerful force for positive change, and LinkedIn exemplifies this by creating opportunities for individuals and businesses alike. Here's why I'm specifically interested in an internship at LinkedIn: Impactful Work: LinkedIn's platform directly impacts millions of users worldwide, helping them find jobs, connect with colleagues, and advance their careers. I'm eager to contribute to a company where my work can have such a meaningful impact. Growth and Learning: LinkedIn is renowned for its culture of learning and development. I'm excited about the prospect of working alongside talented engineers and mentors who can help me grow my technical skills and expand my knowledge in areas such as distributed systems, data science, and machine learning. For example, I'm particularly interested in learning more about how LinkedIn uses machine learning to personalize user experiences and recommend relevant content. Innovation: LinkedIn is constantly evolving and pushing the boundaries of what's possible in the professional networking space. I'm excited to be part of a team that's committed to innovation and tackling challenging technical problems. The opportunity to contribute to cutting-edge projects, such as developing new features for the LinkedIn mobile app or improving the performance of LinkedIn's search algorithms, is incredibly appealing. Culture: From what I've learned through research and networking, LinkedIn fosters a collaborative, inclusive, and supportive work environment. I believe that a positive and engaging culture is essential for creativity and productivity, and I'm confident that I would thrive in LinkedIn's team-oriented atmosphere. Professional Development: An internship at LinkedIn would provide invaluable experience and exposure to the tech industry. I'm eager to learn from seasoned professionals, build my network, and gain practical skills that will prepare me for a successful career in software engineering. I'm particularly interested in opportunities to attend workshops, training sessions, and networking events offered to LinkedIn interns. In summary, I want to intern at LinkedIn because I'm passionate about its mission, excited about the opportunity to learn and grow, and drawn to its culture of innovation and collaboration. I believe that my skills and enthusiasm would make me a valuable asset to your team, and I'm eager to contribute to LinkedIn's continued success.