Meta (Facebook) Interview Questions

Siddharth R. - "IG already has a large user base. So the team would not need to look into acquire more people but enable new feature(s) for users to be more excited (which eventually would result in more people coming back more often). Facebook, as a company, strives to connect more people and help them have an amazing experience through interactions with their friends. This is the basic principle on which FB's various apps work on. So I would aim to build this feature with the overall vision of the company to"See full answer

Murat S. - "public class Solution { public string MinRemoveToMakeValid(string s) { var dict = new Dictionary(); dict.Add('(', 0); dict.Add(')', 0); StringBuilder result = new StringBuilder(); for (int i = 0; i = dict[')']+1) { result.Append(c); dict[c]++; } } else result.Append(c); } StringBuilder answer = new StringBuilder(); dict.Clear(); dict.Add('(', 0); dict.Add(')', 0); for ("See full answer

Bhavna S. - "Step 1: Define Objectives and Key Metrics Objectives: Understand the demand for group video calling. Assess the potential impact on user engagement. Identify technical and user experience considerations. Key Metrics: Call Frequency: Number of 1:1 calls per user. Call Duration: Average duration of 1:1 calls. Call Participants: Identify users who frequently call multiple individuals. Concurrent Calls: Instances where users are engaged in multiple 1:1 call"See full answer

Ina K. - "HashMap supports insert, search, delete and retrieve in O(1). It stores data as key value pairs."See full answer

San S. - "How might the system design change if it is limited specifically to a web/mobile use case?"See full answer

Usman B. - "System Components Data Collection Layer Posts with hashtags are asynchronously sent to Kafka topics Each message contains: hashtag, timestamp, userid, postid Multiple Kafka partitions ensure scalability and fault tolerance Processing Layer Apache Flink processes streams in real-time Implements sliding window aggregation (1hr, 24hr, 7d windows) Calculates topic popularity using weighted metrics: Post count User engagement (likes, comments) Unique user"See full answer

Steve Y. - "Define: How is daily post view calculated Isolate Issues: Data issue Time period Geo IOS vs Android vs Web Correlated Metrics in the funnel DAU Time spent/ scrolls Engagement - likes, comments External factors Competitor actions Big events Internal factors Product launch Feature change"See full answer

Robert H. - "I use ChatGPT a lot to either refine my own answers or stories and make them better, or to answer questions which I would then refine to be more personal to me. Here's what ChatGPT says about this question: This question is testing your analytical thinking, data-driven decision-making, and product sense—especially in the context of Meta’s focus on engagement and content ranking. The best approach is to **define key engagement metrics, outline an experiment design, and consider trade-of"See full answer

Vishal S. - "Product Understanding - Ads are what you see from companies as stories, posts, reels. Post are from users (connections). We have to design an experience which produces maximum engagement while generating ad revenue. Clarifying Questions - Is it specific to posts/stories/reels ? Is there an existing post to ads ratio or do we have to start from scratch? Is it specific to a device/OS? Is it specific to a region/user demographic? Assumption - Existing posts to ads ratio"See full answer

Rachita D. - "I will start with making sure that I have a clear understanding of Medium and how it works. I will ask the interviewer to fill in any gaps in my knowledge of Medium. Medium is a platform for novice, and professional writers to express/share their opinions readers to read about subjects that matter to them the platform has been running for some time (6-7 years), so it is relatively mature (this confirms that Medium has found a product-market fit) Here is my high-level structure for answeri"See full answer

R K. - "Clarifying Questions FB login is the feature that allows a user quickly create a login in a third party application using existing information from FB - YES For whom do we want to improve the product / feature - You choose On what platform mobile / desktop - Mobile Any specific geography - US Any specific user demographic - NO What is the goal of the improvement (acquisition, engagement, retention, monetization) - engagement & retention Outline: Who are the users"See full answer

Debajyoti B. - "First Clarify whether this is for FB general account or business account Why is removing the profile pic being considered in the first place? Declining conversion rates? TTV(signup to post creation) is perceived as too high wrt competing apps? Meta is considering a single signup for all its apps(FB, Insta, WA) & is looking to optimize the same? Do we have any supporting data for this? user feedback? Next Look at current FB signup flow(assuming these are the steps since its be"See full answer

Mahesh M. - "Clarification questions Is this a new app or an existing one? - new Is this going to be part of fb or stand-alone - fb app or web - app geo - any/US consider pre covid or covid - covid Grocery store - physical or online store? - physical store FB mission - connect people together The goal of the grocery store - help local stores to connect with users and drive more revenue Users Shoppers 13 - 21 - limited shopping power 21 to 50 - tech-savvy, a fb account already. 50+ - not"See full answer

Vishal S. - "Product Understanding - Push notifications are pop up notifications received on the device (phone, tablet etc.) sent by various Meta apps whenever a new post has been made or a new message is received Clarifying Questions - Is is specific to one device? Is it specific to one product? Is it specific to one region? Is it specific to one OS? Is this as a result of changes to algorithm/UI? Existing or a new feature? Assumptions - KPI calculation will only be for users who h"See full answer

Ajay P. - "Designing an evaluation framework for ads ranking is crucial for optimizing the effectiveness and relevance of ads displayed to users. Here's a comprehensive framework that you can use: Define Objectives and Key Performance Indicators (KPIs):** \\Click-Through Rate (CTR):\\ The ratio of clicks to impressions, indicating the effectiveness of an ad in attracting user attention. \\Conversion Rate:\\ The ratio of conversions (e.g., sign-ups, purchases) to clicks, measuring how well"See full answer

Adam L. - "Discussed: Requirements of the system: latency language modality (assume keyboard typing) availability of data (assume cold start) success metric (accuracy of next word predicted?, or minimize false positives? -> accuracy to start) Data collection and processing: design ethical user experiments to collect typed out data design a simple tokenization strategy (word level encoding, character level encoding, byte-pair encodings, and discuss tradeoffs) collect data, and split"See full answer

Anonymous Sparrow - "To make sure we are on the same page, this is a feature in the current FB app that would make it easier for people to volunteer? Or more broadly, the feature would aim to expand the base of volunteers. To start I want to dive deeper on the objective of the feature. Then we can look at possible users, pick a segment and outline their needs, then look at some solutions. We can then prioritize and see how we might roll something like this out. If I look at FB mission of building community and brin"See full answer

Ankit M. - "Interviewer: Design a Meta Product for space travel. Me: I would first likely ask a few clarifying questions. Can we discuss more about what do we mean by a product for space travel? Is it like a physical product or a software product? Any existing suite of products that we want to integrate this into? Interviewer: It can be a digital platform – a combination of software and services, integrated in a single ecosystem. It's not a physical product like a spacecraft, but rather a pla"See full answer

A R. - "Interviewee: Before I start discussing the solution, I would like to ask a few questions & clarify a few things. Is that okay? Interviewer: Yeah, Sure. Please go ahead. Interviewee: First, I would like to clarify that the Google Map (Offered by Google) you are referring to is the same one that we use on our mobile to find addresses, get route maps, and find different places like restaurants, and hotels near our place. **Interviewer: Yes, we are referring to the same Google Maps. We a"See full answer

Alan T. - "I want to work at Meta because of its reputation as a company that consistently pushes the boundaries of technology, particularly in areas like AI, machine learning, and immersive technologies such as AR and VR. I admire Meta's mission to bring people closer together and create meaningful connections, as well as its focus on long-term innovation, such as the development of the metaverse. As an AI engineer, I'm excited about the opportunity to work on cutting-edge projects that have a global impa"See full answer