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Kubernetes

What is Kubernetes? Kubernetes is a portable, extensible, open-source platform for managing containerized workloads and services, that facilitates both declarative configuration and automation. It has a large, rapidly growing ecosystem.  The name Kubernetes originates from Greek, meaning helmsman or pilot. Google open-sourced the Kubernetes project in 2014. Kubernetes combines over 15 years of Google’s experience running production workloads at scale with best-of-breed ideas and practices from the community. Why you need Kubernetes and what it can do? Containers are a good way to bundle and run your applications. In a production environment, you need to manage the containers that run the applications and ensure that there is no downtime. For example, if a container goes down, another container needs to start. Wouldn’t it be easier if this behavior was handled by a system? That’s how Kubernetes comes to the rescue! Kubernetes provides you with a framework to run distributed systems resi
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NodeJS

Question : Why You should use Node JS? Answer :  Following are the major factor influencing the use of the NodeJS Popularity : The popularity can be important factor, as it has more user base and hence solution  of any common problem faced by developer can found easily online, without any professional help. JavaScript at all levels of the stack :  A common language for frontend and backend offers several potential benefits: The same programming staff can work on both ends of the wire Code can be migrated between server and client more easily Common data formats (JSON) exist between server and client Common software tools exist for server and client Common testing or quality reporting tools for server and client When writing web applications, view templates can be used on both sides Leveraging Google's investment in V8 Engine. Leaner, asynchronous, event-driven model Microservice architecture Question : example of node JS code? Answer :  const fs = require('fs'); const uti
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Graphql

Question : Why GraphQL? Answer : There are various reason why we benefit from using the graphQL Clean API between backends and frontends Less communication overhead  No more time spent writing API documentation No more time spent trying to figure out an API Great tooling for your API Supports multiple clients and multiple server interactions. Question : Describe GraphQL in nutshell? Answer : GraphQL is Language and Runtime both, Language gives us the tool to specify the queries, mutation, subscription, fragment. Runtime describe the validation, Type Systems, execution and introspection. Question : Describe the overall interaction cycle of the graphQL? Answer : These are the basic steps carried during the interaction between client and the server Read inputs from Interface, Parse into the Abstract Syntax Tree,  invokes its resolver function, then it either gets the scalar data or else invokes another internal resolver function. Data returned from resolver function are then merge toge
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HTML&CSS

Question : Why title element is important? Answer : This is the element represent, html page in the tab, also when you add this webpage as a bookmark then it will be a default name saved for the bookmark name. Question : What is the benefit of using the label? Answer : the for attribute of lable tag will able to associate the name with the element, and clicking on the label itself is good enough to add the focus and and selection to the given element. Question : Does the box-sizing property affect the overall width or height of the elements? Answer : Yes, border width, padding and margin is added to the width properties, e.g. h1 { line-height : 40 px ; font-weight : bold ; color : aqua ; font-size : 40 px ; width : 300 px ; padding : 50 px ; margin : 50 px ; border : 10 px dotted ; text-align : center ; } This means that the overall of width of the element is width value  + 2 * padding [ right + left ] + 2 * border [ left + right ]. Question : What
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Javascript

Question : example of Map Reduce Answer : (() => { let aNumberArray = [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ] ; let sum = aNumberArray. map (data => data * 2 ) . reduce ((ongoing , data) => ongoing + data) ; console . log (sum) ; })() Question : What is IIFE? Answer  : Immediately Invoked function expression e.g. (function(){}()). usually pronounces as " effy ". Question : Why the script tag should be added at the bottom or before the end of the body tag? Answer  : It helps the html page to render quickly without even downloading the script which may be getting downloaded from the slow CDN. there are other alternative like async and defer as well, which are supported primarily on new browsers.     <script src="bower_components/angular/angular.min.js" defer></script>     <script src="bower_components/jquery/dist/jquery.min.js" defer></script>     <script src="bower_components/boo
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