Interview Questions

Alvaro R. - "bool isValidBST(TreeNode* root, long min = LONGMIN, long max = LONGMAX){ if (root == NULL) return true; if (root->val val >= max) return false; return isValidBST(root->left, min, root->val) && isValidBST(root->right, root->val, max); } `"See full answer

Ankit kumar S. - "A 25% drop-off rate at sign-up for a new app, especially one from Meta, indicates a significant challenge in onboarding and user retention. To analyze this, consider external, internal, and product-specific factors. Identify Potential Causes: External Factors:Competition: Are other platforms offering a more attractive or simpler signup process? Timing: Is there a recent major event or trend that might be influencing user behavior? User Experience: Is the signup process clunk"See full answer

Bg - "My use of Pinterest is somewhat limited. Pinterest is a social network that enables users to save and share ideas in a visual manner. So whether you are interested in fashion, health, lifestyle, decor, sports, you can learn about those in a visual manner. Am I correct? Of course, Pinterest provides recommendations for people to follow, makes it easy to save images as pins, categorize into various topics. The source of revenue is advertisements. That’s my understanding. Is there anything else I"See full answer

Kusheta K. - "In one of my projects, l analyzed customer purchase data for a retail company to under why sales were decrease"See full answer

Pramod V. - "I would like to ask questions to the interviewer as to if the company or I as TPM have any success history handling this magnitude. Also, I will talk on my behalf to justify my experience and caliber to drive this magnitude of project to success. But, I always follow a flow-chart approach when meeting exec management where I do my home work studying the current state of the project/ pain points/ issues/ blockers and steps we have taken or planning to take next to mitigate it. Now w.r.t the flow"See full answer

Anjali M. - "Define Groups: Platform where users ( organizers and members) with shared interests can come together and express their thoughts and opinions. Meta's mission: To bring ppl closer together by giving them access to tools and technology. Groups Mission alignment: Gives Organizers and members to come closer together over shared interests and build community. Users : Organizers ( create a group-> invite people on the platform --> can accept or deny a member to the group --> Intera"See full answer

Ankit kumar S. - " logo Contact Interview Preparation Application Process Career Advancement Onboarding and Orientation Common Interview Questions Dashboard Creation Interview Questions and Answers Dashboard Creation Interview Questions and Answers What is a dashboard? Answer: A dashboard is a visual representation of key performance indicators (KPIs) and other important data, designed to provide a high-level overview of a specific area or business process. It typically uses charts, graphs, and other da"See full answer

Anonymous Flamingo - "Handling projects out of my expertise: When faced with a project that falls outside of my expertise, I take the following steps: Identify my skills and knowledge gaps: I assess my own strengths and limitations, and determine which areas of the project may be outside of my comfort zone or expertise. Seek guidance and mentorship: I reach out to colleagues or subject matter experts who have relevant knowledge or experience, and ask for their advice and guidance on the project. Learn and adapt"See full answer

Kiran M. - "The primary objective of Instagram Stories is to share fleeting moments and engage with followers in a more casual way, through photos and videos that disappear after 24 hours. Its also used to showcase all ongoing Instagram Live events. There are 4 user segments Story Viewers Story Creators (who posted the story) Live event creators Live event viewers No of stories posted per user per day -> How to nudge users to post more stories and tag their friends/location. No of stories view"See full answer

Sourabh G. - "Functional Requirement Monitor health, metrics Alert in case of failure/anomaly Visualize the live health Analyse machines on periodic basis Non Functional Should not exert load on machines low latency Highly scalable Logs/Metrics Gathering push - machine gather and send to system and low priority background thread along with batching pull - heart beat check (for offline machines) Processing Real time streaming using Kafka/kinesis + Flink TimeSeries database for stor"See full answer

Meet P. - "Improve Swiggy’s Revenue What time period? Improve to what extent? Increasing Swiggy’s revenue in next one year (assume) Any specific segment of Business? Swiggy’s Mission Statement : To make food eating experience as comfortable, convenient & authentic. Type of Business Swiggy is in Food Delivery Grocery Delivery - Instamart Dining Let’s Aim for one Business line say Food Delivery lets breakdown the revenue maths for the business and see what we can do to improve revenue F"See full answer

Jacky Y. - "Problem scope: Can this system detect Bot in real-time online or offline? Both. Online traffic: 1M DAU. Latency: 2s. Offline frequency: daily Offline data: 2B activity logs. Data: How do we know a Bot player (Label)? Human label. Imbalance data: reweight, resample. Develop a Bot simulator to generate more data offline for training. Given lower weight to simulator data than human label. Features: Signals from different models online. Log all the features for offline. Propose new features: dail"See full answer

Bhaskar B. - "This could be done using two-pointer approach assuming array is sorted: left and right pointers. We need track two sums (left and right) as we move pointers. For moving pointers we will move left to right by 1 (increment) when right sum is greater. We will move right pointer to left by 1 (decrement) when left sum is greater. at some point we will either get the sum same and that's when we exit from the loop. 0-left will be one array and right-(n-1) will be another array. We are not going to mo"See full answer

XYZ - "We have observed that DAU have been declining, while MAU has remained constant. Activity is define as: Logging in. Viewing content. Posting content. Interacting with other users (likes, comments, etc.). Daily Active Users (DAU): This measures the number of unique users who engage with Instagram on a daily basis. It indicates how frequently users interact with the platform and reflects its daily stickiness. Monthly Active Users (MAU): This measures the number of unique users who en"See full answer

Aniket D. - "Goal: Before we look at FB Newsfeed, let's align ourselves with the overall goal of FB, that is, to bring the world closer together. Feature Introduction/Clarification: FB Newsfeed is a core feature of the social networking platform that allows people to share updates, and catch up with what the world around them is talking about, group activities, events, etc. Actions: On Newsfeed, one can: share their updates, feelings, etc. catch up with updates from the people, groups, pa"See full answer

N N. - "As a software engineer, there are a number of ways I could potentially contribute to improving Walmart.com. Here are a few ideas: Performance Optimization: Walmart.com is a complex web application with many moving parts. One potential area for improvement could be to optimize the performance of the site to make it load faster and feel more responsive. This could involve things like optimizing images, improving server response times, or reducing the number of HTTP requests required to load the"See full answer

Kusheta K. - "After cleaning and organizing the data the dataset become retable and ready for analysis. This helped the tame make accurate decision based on clean data"See full answer