Interview Questions

Avon T. - "Initialize left pointer: Set a left pointer left to 0. Iterate through the array: Iterate through the array from left to right. If the current element is not 0, swap it with the element at the left pointer and increment left. Time complexity: O(n). The loop iterates through the entire array once, making it linear time. Space complexity: O(1). The algorithm operates in-place, modifying the input array directly without using additional data structures. "See full answer

Namu - "Provided an example from my work history where I asked to move the Go-live date to prevent launch date failure."See full answer

Umang S. - "Before diving into answering this, I would like to ask some clarifying questions - High Level - What is the mission, goal, target for this year for WhatsApp? Assumption answer - 10X growth in users Do we have any road map where we can see it with more details? Yes we wish, it is kind of all over the place Do you know how far we have come from the start of the year to achieve that target? Yeah we have done some progress but not much Which quarter are we in? 1"See full answer

Elisa L. - "Being a marketplace, there are two users that Uber wants to satisfy: the rider and the driver. I think the ultimate success metric is related to how well riders and drivers get matched. The ultimate goal for the rider is to get to their destination as efficiently as possible. Some concerns for the rider may be Matching with drivers Minimizing waiting time waiting to be matched and waiting for the driver to arrive Ease of pick-up and drop-off (ie. Driver coming from the opposite side of t"See full answer

Bamboo Y. - "Since the problem asks for a O(logN) solution, I have to assume that the numbers are already sorted, meaning the same number are adjacent to each other, the value of the numbers shouldn't matter, and they expect us to use Binary Search. First, we should analyze the pattern of a regular number array without a single disrupter. Index: 0 1 2 3 4. 5 6. 7. 8. 9 Array:[1, 1, 2, 2, 4, 4, 5, 5, 6, 6] notice the odd indexes are always referencing the second of the reoccurring numbers and t"See full answer

Kofi N. - "const mergeIntervals = (intervals) => { const compare = (a, b) => { if(a[0] b[0]) return 1 else if(a[0] === b[0]) { return a[1] - b[1] } } let current = [] const result = [] const sorted = intervals.sort(compare) for(let i = 0; i = b[0]) current[1] = b[1] els"See full answer

Venkateswara reddy K. - "Form what I know I would state the following two points: Only 20% of google's $180B revenue comes from non-ad revenue sources. Google Cloud is a big part of Google's revenue diversification efforts. Google cloud at $13B is still under 10% of total revenue. Google cloud is at position 3 compared after Amazon AWS and Microsoft Azure. Typically only top 2 platforms take majority of stake in a lot of businesses. Google Cloud's Goal: Become one of the top two Cloud platforms in the world by deep"See full answer

Ammro H. - "I am not sure if I agree with the approach taken in the mock video. Should FB build a tablet? is not the same as "Design FB tablet." This is an analytical decision question, not a design question. I would have done strategic analysis using Porter's five forces or maybe SWOT and value chain analysis to decide rather than designing a product. My answer will be to examine critical factors to decide to build tablet vs. to build apps for existing non-FB tablets (ipads and android tablets) Users"See full answer

realkimchi - "Define: What is the Verified Badge Product? The Meta verified badge is a product displayed alongside a verified user’s profile across all Meta platforms. Mission: Why Build the Verified Badge Product? Trust and Authenticity: Meta's primary reason for introducing a Verified Badge is to enhance trust and authenticity across the platform. By confirming the identities of key figures and influencers, Meta can assure users that their interactions are with genuine profiles, no"See full answer

Akshai V. - "When are you talking about Sales Is the Number of Items that have dropped or GMV dropped ? If the GMV has dropped then clearly there is a drop in the Price of Items ? Is there any category or White Goods which have lead to decrease in the Price of Goods ? Is there a Long Term Promotion running By the Marketing and not because of it ? A customer Journey in a typical Market Place is that customer adds items to car Go To E-Commerce Site -----> Search--->Add Items to Bag"See full answer

Anonymous Shrimp - "I would start off by talking about the goals of this feature. What's the goal of Instagram with blue check marks? What does it aim to achieve? For the purpose of this question, I am assuming that Instagram wants to verify celebrities/famous people/brands as the original profile that differentiates them from fake profiles or other fan groups. It's also to develop trust and credibility amongst Instagram users. The mission of Facebook is to connect people across the globe. Instagram, which is a p"See full answer

Anonymous Prawn - "Would be better to adjust resolution in the video player directly."See full answer

V V. - "Simple file system ( Hash Map , LSM trees), and consistent hashing. I failed to discuss about conflicts ( Versioning)"See full answer

R S. - "One of the biggest risks I have taken was in a recent product, where we developed a new feature and released the feature externally without QA sign-off. Feature - Interactive Travel Itinerary Maps We had about ten days from the time we decided to include this new feature in the external launch. Usually, the biggest chunk of time in each release cycle was the sign-off from an external QA team. We fast-tracked the dev effort and completed the development of the feature in five days. Unfortunately,"See full answer

Ushita S. - "Video has audio disruption starting at ~7th minute, did not understand what law he was talking about. Can someone please clarify?"See full answer

Anonymous Krill - "Clarify the question. Any specific system? Will study the related systems in the environment. Will define the goal, attributes of the system, stakeholders expectations, problems this system is going to address in case these things don't exist already. With the above two steps, I Will come up with a draft of the System KPI. Will run it with leadership, stakeholders and will incorporate feedback. In parallel, will come up with quantification on these performance factors. Fina"See full answer

Nikita B. - "Mission: Tiktok's mission is to inspire creativity and Joy. Any business wants to make sure that they are serving the value to their customers: For TikTok customers are: Viewers 2. Content Creators 3. Advertisers So few metrics we could measure are: Time spent/day Total no of videos created/day engagement rate = users who interacted in one of the meaningful action on Tiktok / total users at a day level either likes, share, watched vide for at least 5 mins, created video "See full answer

Kartikeya N. - "C : Okay. So I would want to start with knowing what is the product for which we have to build a recommendation system. I : This is a photo sharing product. C : Okay. So is this something on the lines of Instagram? I : Yes C : Okay. And are we a new product co or we have some current product built already? I : You can assume yourself. C : Okay. Is there any demography or country we are targeting? I : No, this is a global product C : Okay. So, the biggest goal of any product recommendation system"See full answer

Darpan D. - "Clarifying Travellers in this context are people who are taking domestic or international flights. Answer: Correct. Are we designing to integrate into an existing product line or completely standalone? Answer: Integrate into existing products. Are we designing for a specific geography? Answer: Let’s try North America first; we can expand later. Company Mission Organize the world’s information and make it universally accessible and useful. Company Strategy "See full answer

Chris C. - "Here are the key entities to design a relational schema for a calendar application: User - userid, email, firstname, lastname Calendar - calendarID, calendarName, caledanUserID, defaultUIView, created, updated, status Event - eventID, eventName, eventUserID, isRecurrence, startDateTime, endDatetime EventReminder - eventID, reminderMethod(email, notification), reminderTime, reminderTimeUnit(min, hr, day) Event guest - eventID, userID, isRequired, acceptStatus"See full answer