Interview Questions

Jagan M. - "This system design question is very small compared to other questions like design instagram, twitter, google drive etc... Since the design involves less components the level of detail we have to go in them were deep. I had to explain how to deal with all the NFR for the distributed cache system. Whether it is a push model or a pull model. Hade to do BOE calculations for the database too."See full answer

Michelle D. - "I would first want to confirm my understanding of the reasoning behind no-ads-allowed in the top left of the feed. For this case, I will assume that the rule is not a hard rule and one in which we may test in this prompt. I'd next confirm my understanding of Pinterest's revenue model with the interviewer. My understanding is as follows: Pinterest serves ads to pinners. Conversion (i.e., purchase) via the ad yields some amount of profit to Pinterest. There's some amount of costs associated and"See full answer

L B. - "For data distribution drift: DL Divergence or PSI (Population Stability Index) performance: two categories: 1st operational metrics: runtime. 2nd model performance: loss function, MAE (regression), business metrics: overall watch time, DAU, revenue lift etc Outlier: data distribution"See full answer

Jack F. - "conduct direct user research through methods such as interviews, surveys, and focus groups to gather qualitative insights into user preferences, pain points, and behaviors. Additionally, I analyze quantitative data from sources like user analytics, feedback metrics, and market research to identify trends and patterns. Collaborating closely with stakeholders, including customers, internal teams, and subject matter experts, further enriches the requirements gathering process by incorporating diver"See full answer

Nishant S. - "First step would be to define the goals. Many different opinions could themselves be due to unclear goals. The process of arriving at goals could be based on what are the larger goals of the company or based on prioritization of impact/potential impact. Although not all the stakeholders would possibly be involved in the goal setting exercise, it's important to explain the process behind arriving at the goals and why these are important. Next step would be to get buy-in of the stakeho"See full answer

Julien C. - "👇 Your feedback is very much appreciated 👇 Defining metrics: Activation Mobile downloads New user registration Retention and Engagement Nb messages sent Average nb of contacts per user Nb groups Monetization CAC LTV ARPU MRR Prioritizing: What matters most for WhatsApp right now is Engagement. I would therefore prioritize these three: Nb messages sent Average nb of contacts per user Nb groups"See full answer

Beginner P. - "Skeleton: Mission Metrics to improve User segments & the segment with most impact User journey Pain points and opportunities Features/solutions & prioritization Starting with Twitter's mission, "the power to create and share ideas & information without any barriers", we are looking to empower people to be both consumers and generators of content. Are these users interacting with Twitter on the website or the mobile app? [Clarifying with interviewer, who answers mobile app.] "See full answer

Alick C. - "The first step is to engage the coworker. Listen to their request and try to understand the root cause of the discomfort. Is it internal or is it the environment that the team operates in, is it a specific individual. Having an open conversation, I believe adds to a culture of being open to discussions for feedback. Depending on the response, would work together with the coworker to identify means or ways that can reduce/remove the discomfort and what can produce an ideal working environment. Th"See full answer

Chayan R. - "Clarifying questions: You said on average, having 5 reviews can have positive impact, so I am assuming we will plan to pay for 500 reviews. Is that correct or am I missing anything here ? One information which seems to be missing here to come up with the exact price per review is the number of active visitors from which we are calculating the sales conversion rate. Do we have that information or I should include that as a variable in the price per review. ( assuming we are taking that as a var"See full answer

Gaurav K. - "I think sliding window will work here and it is the most optimized approach to solve this question."See full answer

SG - "Clarifying questions - Alexa HW, Alexa SW, Alexa particular feature? Assumption - Pick any. Picking HW due to relevance with my background. Any particular pain point that we are trying to address, or any specific goal that I should be aware of? Assumption - None. Mine to pick. Goal for Amazon is to be the most customer centric company. To extend the same vision - With Alexa HW our goal is to provide the best customer experience possible. **Restating problem state"See full answer

Jack F. - "This is an estimation question - the goal is to show your thought process to the interviewer how you think through the question Let's make some assumptions - we are only focused on the TAM for Capital One's new potential card For the purpose of scoping this more narrowly let's assume we are solely focused on the U.S. Let's continue to scope in... 1). We know the United States population is somewhere in the ballpark of ~330MM (let's use round figures) 2). You should have some due dili"See full answer

Nithesh S. - "First, let us start with the mission of Amazon: “We strive to offer our customers the lowest possible prices, the best available selection, and the utmost convenience.” Alignment of recommendations system with Amazon's mission: Suggesting recommendations to the users would be a part of this mission as it would allow users to buy things on their mind for the lowest cost in market (may or may not be true). They might get better prices if they order adjacent items together. For example, i"See full answer

Guilherme F. - "A much better solution than the one in the article, below: It looks like the ones writing articles here in Javascript do not understand the time/space complexity of javascript methods. shift, splice, sort, etc... In the solution article you have a shift and a sort being done inside a while, that is, the multiplication of Ns. My solution, below, iterates through the list once and then sorts it, separately. It´s O(N+Log(N)) class ListNode { constructor(val = 0, next = null) { th"See full answer

Aimable - "Clarifying question: Is there a goal that we have in mind? Fb mission: empower people to create community and bring the world closer together IG shops as I understand are the marketplace on IG, where users can view items listed for sale by creators/businesses and also search for specific items or categories. Users can actually buy through shops instead of getting navigated to the original business website. IG shop goals: Businesses continue to face the challenges of selling onli"See full answer