Privacy Engineer, Incident Response and Investigation

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Let's talk about strings. Suppose you're given two strings, text and pattern. Your task is to implement a function that efficiently determines if the pattern is a subsequence of the text. A subsequence is a sequence that can be derived from another sequence by deleting some or no elements without changing the order of the remaining elements. For example, ace is a subsequence of abcde, but aec is not. Your function should return true if the pattern is a subsequence of the text, and false otherwise. Example 1: text = abcde pattern = ace Output: true Example 2: text = abcde pattern = aec Output: false Example 3: text = abcde pattern = Output: true (An empty string is always a subsequence) Example 4: text = pattern = abc Output: false (A non-empty string cannot be a subsequence of an empty string) Consider edge cases such as empty strings and differing lengths. Discuss the time and space complexity of your solution. Aim for an optimal solution.

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Design a System for Real-Time Twitter Trending Topics Let's design a system to identify trending topics on Twitter in real-time. Consider the following: Data Ingestion: How would you ingest the massive stream of tweets from Twitter? Processing: How would you process the tweets to extract relevant information (e.g., hashtags, keywords)? Trending Detection: How would you identify trending topics based on the processed data? What algorithms or techniques would you use? Scalability: How would you design the system to handle a large volume of tweets and users? Storage: What storage solutions would you use to store the tweets and trending topics? Consider both short-term and long-term storage. Network Requirements: Estimate the network bandwidth required for data ingestion and processing. Performance Optimization: How would you optimize the system for low latency and high throughput? For example, assume that Twitter generates 500 million tweets per day. Design a system that can identify trending topics within a few minutes, considering the computational resources, storage, and network bandwidth needed.

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Describe your proudest project. What were the challenges, and what was your specific role in overcoming them? Elaborate on the technologies used, the impact the project had, and what you learned from the experience. For example, if you developed a new feature for a popular app, explain how it improved user engagement or solved a specific problem for users. Or, if you automated a critical business process, describe how it increased efficiency and reduced errors. If you led a project, explain how you motivated the team and overcame interpersonal challenges. Be sure to highlight your specific contributions and quantify the results whenever possible, showcasing the positive outcomes you helped achieve.