Interview Questions

Ying T. - "def encode(root): if not root: return [] def dfs(node): if not node: return res.append(node.val) res.append(len(node,children)) for child_node in node.children: dfs(child_node) res = [] dfs(root) return res def decode(arr): if not arr: return None n = len(arr) i = 0 def dfs(val, children_count): if children_count == 0: return Node(val) cur_node = Node(val) cur_node.children = [] for j in range(children_count): nonlocal i i += 2 cur_node.children.append(dfs(arr[i], arr[i"See full answer

JGJGJG - "What do you think you fumbled here with? how would you have restructured the answer with the interviewer? appreciate the reply here :)"See full answer

Khushbu R. - "Let’s say the matrix is m x n (i.e., m rows and n columns). Start from the top-right corner of the matrix. Move left if you see a 1. Move down if you see a 0. Keep track of the row index where you last saw the leftmost 1 — that row has the most 1s. public class MaxOnesRow { public static int rowWithMostOnes(int matrix) { int rows = matrix.length; int cols = matrix[0].length; int maxRowIndex = -1; int j = cols - 1; /"See full answer

R A. - "Company Mission: Make video communication frictionless Product: Zoom is a telecommunications tool used by companies and individuals to interact with one another. It has a freemium business model i.e. it provides some basic features to its users for free and premium features for a subscription. Features: Video and audio interactions. Built-in collaboration features. End-to-end encryption for all meetings. Recording and transcripts. Streamlined calendaring. User Base: "See full answer

Maia T. - "Clarify When we say creates value, is there a specific metric that we want to measure as driving value, i.e. engagement or revenue? Interviewer: Up to you. Capital One overall is a financial institution. I don't believe the real value here is through direct revenue from affiliate partnerships which is likely small in comparison to other business. Let's say engagement since the value to Capital One is to learn more about the customer to provide them targeted offers and experiences. "See full answer

Hamzeh J. - "Evaluate how much the issue affects the sprint goal and timeline. If it blocks the main goal, it needs to be prioritized. Discuss the issue with the team. Analyze the root cause of the issue. Is it because of unclear requirements or a design flaw? You may need to re-prioritize tasks. If the issue is serious enough to delay or change the sprint goal, communicate the updates to stakeholders and manage their expectations. Keep an eye on the solution’s progress and adjust your plans a"See full answer

Rajeev K. - "Here's how I'd approach investing that $10 million over the next year and a half. The biggest chunk about $4 million would go straight into our core infrastructure because that's what everything else depends on. We're seeing massive demand for real-time payments, so I'd put $2.5 million into building instant settlement capabilities and integrating with FedNow and RTP rails. The remaining $1.5 million would beef up our platform scalability because we're hitting capacity limits during peak times,"See full answer

Kaitlyn M. - "System architecture diagram. Define API params, responses, tradeoffs between caching and webhooks to update message delivery status."See full answer

Samya S. - "Asked clarifying questions Thought through the motivation (came up with a mission and business model, modeled it on Safeway with agreement from the interviewer User segmentation both by age groups and behavior, then prioritized user group Went through user journey (both physical store and online) to identify pain points Prioritized pain points Came up with 5 solutions Interviewer picked one for me to deep dive. I went into detail on that one. "See full answer

Hidayat E. - "Value of Moving All Customers to the Mobile App Full Monitoring of User Behavior Gain deeper insights into customer preferences and habits. Use data analytics to identify trends, predict needs, and offer personalized solutions. Better Engagement Provide a more interactive and engaging experience compared to traditional channels. Enable gamification, personalized notifications, and targeted campaigns to keep users active. Enhanced Direct Interaction _Leverage"See full answer

John H. - "All products and services have to sell. I would create measurements on how much time, labor, and funds went into a project and how much value it brings back to customers and company."See full answer

Jaswanth P. - " Prioritized Features for Improvement 1. Content Discovery and Recommendation Algorithm Rationale: The algorithm significantly influences user engagement by determining which videos appear on the "For You Page" (FYP). Improving its accuracy can enhance user satisfaction and retention. - Approach: Incorporate more nuanced data points, such as user mood indicators or contextual data (e.g., time of day, trending events) to refine recommendations further. Regular updat"See full answer

Suraj - "UberPool Product built for Uber Uber is a network of drivers & riders that allow to transport riders from A to B UberPool UberPool product solves for 2-3 riders to take a trip to a destination that works for everyone. It helps with reduced cost for riders, reduced emissions, make it faster to reach destination during high traffic hours makes it harder to find a ride --> until you find users willing to go to same destination "See full answer

Ankita G. - "Merge Sort"See full answer