Research Engineer, Computer Vision - GenAI Evaluations

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Implement a SnapshotArray that supports the following interface: SnapshotArray(int length) initializes an array-like data structure with the given length. Initially, each element equals 0. void set(index, val) sets the element at the given index to be equal to val. int snap() takes a snapshot of the array and returns the snap_id: the total number of times we called snap() minus 1. int get(index, snap_id) returns the value at the given index, at the time we took the snapshot with the given snap_id For example: Input: [SnapshotArray,set,snap,set,get] [[3],[0,5],[],[0,6],[0,0]] Output: [null,null,0,null,5] Explanation: SnapshotArray snapshotArr = new SnapshotArray(3); // set the length to be 3 snapshotArr.set(0,5); // Set array[0] = 5 snapshotArr.snap(); // Take a snapshot, return snap_id = 0 snapshotArr.set(0,6); snapshotArr.get(0,0); // Get the value of array[0] with snap_id = 0, return 5 What data structures and algorithms are best suited for this problem? What are the time and space complexities of each operation?

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Let's design a stories feature, similar to Instagram or WhatsApp. These stories should disappear after a friend views them and only be available for 24 hours after publishing. Consider the following aspects: Functionality: How would users create and upload stories (photos and videos)? How would users view stories from their friends? How would you implement the 24-hour expiration? How would you handle the disappearing aspect after viewing? Scalability: How would you handle a large number of users uploading and viewing stories simultaneously? How would you efficiently store and retrieve stories? How would you manage the storage as stories expire? Data Model: What database schema would you use to store story information (user, timestamp, media URL, view status)? How would you track which users have viewed a story? Technical Challenges: What are the potential challenges in implementing this feature? How would you address issues like latency, storage limitations, and data consistency? Edge Cases: How would you handle users with slow internet connections? What happens if a user uploads a story right before the 24-hour mark? How would you handle deleted user accounts and their associated stories?

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Tell me about a time you had a conflict with a colleague. What was the nature of the conflict, and how did you approach resolving it? What was the outcome, and what did you learn from the experience? For example, perhaps you disagreed on the best approach to a technical problem, or maybe there was a misunderstanding about responsibilities. How did you communicate your perspective, and how did you listen to theirs? What steps did you take to find a mutually agreeable solution? Did you involve a mediator or supervisor, or were you able to resolve it yourselves? What were the key takeaways from that situation, and how have you applied those lessons to future collaborations? It is important to show that you can handle conflict well.