Technical Interview Questions

Catherine Z. - "Clarifying Questions Have we confirmed this was a server side issue and not client side or network related? Interviewer confirms this was a server side issue Do we have additional information on whether this was region specific, user specific? Interviewer says you can make some assumptions Introduction I am going to focus on a few potential factors and describe how they could lead to system downtime: Data Center Power Outage Software Deployment Software Bug P"See full answer

Ridhima K. - "Youtube's mission is to give everyone a voice and show them to the world, in video format. In order to do so, Youtube is optimizing the experience for creators and consumers, and needs to add a layer of smart discovery for bringing the content to the world. Recommendation engine can be for creators- recommending what type of videos (length, genre, video size, etc) they should create for maximum viewership, or for consumers, recommending relevant videos. We'll focus on the recommendation engi"See full answer

Glados - "First, why are we building the system? What are the requirements we must meet - Do customers care about data being read/written from a single set of tables or multiple tables, do they care about cost allocation, do they need backups/storage to happen slow or fast, do they foresee a lot of data movement from one table to another? Based on this, there are a few options using some common design choices. Shared disk, or Shared nothing. Both have pros and cons. Based on latency, performance, and cos"See full answer

Woongshik C. - "Our team were developing a HQ trivia for fitness. So at that moment our focus was developing an eye-catching animation for both iOS and Android. By the way, implementing an animation were hard without the progress of it. So we wanted to see an immediate progress. So I decided to use tools or libraries such as Lottie or Kite. Then it increased the quality and the productivity dramatically. So our designer were happy with it and also our dev team could reuse the code from the designed animation fr"See full answer

Scott S. - " Situation In the derivatives trading domain, timely and accurate data is crucial for making informed trading decisions. Our existing data processing system was facing challenges with latency and scalability, which hindered our ability to react swiftly to market changes. To address these issues, we designed a new real-time market data processing platform. Task The task was to develop a low-latency data processing platform that could handle real-time market data ingestion, processing, an"See full answer

Darpan D. - "Clarifying and assumption When we say financial security, are we talking about authentication, fraud detection or money laundering? Assumption: Fraud detection. Focusing specifically on transaction-level fraud. Is this an internal AI implementation or an external third-party service we provide to multiple financial businesses? Assumption: External Third-party AI financial security product. Requirements Need to detect when fraudulent transactions happen. **Detection stra"See full answer

Ali H. - "SQL databases are relational, NoSQL databases are non-relational. SQL databases use structured query language and have a predefined schema. NoSQL databases have dynamic schemas for unstructured data. SQL databases are vertically scalable, while NoSQL databases are horizontally scalable."See full answer

Astro S. - "what is NUC? "See full answer

Aatman P. - " TC: O(N +E) , SC: O(N+E) from typing import List def areSentencesSimilar(sentence1: List[str], sentence2: List[str], similarPairs: List[List[str]]) -> bool: l1,l2 = len(sentence1), len(sentence2) if l1!=l2: return False #build a adj set adjSet = {} for edge in similarPairs: w1, w2 = edge[0], edge[1] if w1 not in adjSet: newSet = {w2} adjSet[w1]=newSet else:"See full answer

Mehul K. - "Clarifying questions I asked? Are we trying to track any specific type of metric ? Like a Business Metric, Engagement Metric ? No. In general as a admin of a city at Uber what would you track ? Okay. (After collecting thoughts) Revenue from rides per day No of rides per day in the city % of drivers completing more than 10 rides/day, 5 rides/day, 1+ ride/day."See full answer

Sri V. - "First, I'd like to ask some clarifying questions and try to narrow down the scope of this question. Among them I would like to ask: a) How is the behaviour of pricing today? b) Are we looking to optimize a specific goal or a metric ? Ex: Click thru rate, Conversions etc. c) Exactly when user is searching for a product. d) what is dynamic pricing? - Pricing based on demand, inventory availability, user behavior etc. I'd now like to go thru a five step process to answer: a) Hypothesis:"See full answer

Nouna J. - "If this question was for a product manager; I would approach it as I don't really know how actually these vehicles work. I will try to simplify the concept and answer questions like why autonomous vehicles are exists and what is the purpose of them. Autonomous vehicle is a vehicle can do some actions on behalf on a human and as main reason is to increase the safety, so to come up into how they work, I should identify the main actions that human does and prioritize it based on what they may"See full answer

Anonymous Cheetah - "First profile the URL/Webpage to see which components are limiting/blocking the loading of Web page. Based on the observation, identify if it is the latency, server, network or the sheer number of elements that make up the page. Accordingly plan the optimization strategy."See full answer

Debajyoti B. - "As far as i know, when we type a web address in the browser- the broswer connects to the DNS server & finds the address of the website we are looking for after finding it, the browser sends an HTTP request message to the server,with a request to send a copy of the website to the user. all of this information is sent using TCP/IP protocol across your internet"See full answer

Surbhi G. - "Deep Learning is a part of Artificial Intelligence, it's like teaching the machine to think and make decisions on its own. It's like how we teach a child the concept of an apple - it's round, red, has a stem on top. We show them multiple pictures of apples and then they understand and can recognize an apple in future. Similarly, we feed lots of data to the machine, and slowly, it starts learning from that data, and can then make relevant predictions or decisions based on what it has learnt. A co"See full answer

Sagrika S. - "The biggest factor that excites me about technology is its ever changing and dynamic trend. In my life, I have seen the transition from landlines to simple mobile to smartphones, from Cathode tube desktop screen to super slim TFT and many more. I think technology has now (with time) become integral part of human life and getting in-sync with it is like a normal and very cool phenomena."See full answer