Interview Question Helm

Draw the architectural diagram of your current project

Event loop in javascript

Ans:

JavaScript has a concurrency model based on an event loop. JavaScript runtime contains a message queue, which is a list of messages to be processed. Messages are taken out of the queue and processed by the browser UI thread. So, the browser basically works in a loop, picking up and processing messages to do things.

CQRS

Ans : https://interview-preparation-for-you.blogspot.com/2017/02/cqrs_8.html

Onion architecture

Ans : https://interview-preparation-for-you.blogspot.com/2019/01/onion-architecture.html

Hexagonal architecture

Ans : https://interview-preparation-for-you.blogspot.com/2021/06/hexagonal-architechture.html

call() apply() and bind() in javascript

Ans : used to bind this.

setinterval() vs settimeout() javascript

how to stop settimeout() in javascript

Ans : use Cleartimeout method

scope in javascript

Ans : https://interview-preparation-for-you.blogspot.com/2018/12/execution-context.html

closures in javascript

Ans : https://interview-preparation-for-you.blogspot.com/2018/01/closure-in-javascript.html

IIFE (Immediately Invoked Function Expression) is a JavaScript

Ans : https://interview-preparation-for-you.blogspot.com/2021/06/iife.html

Lexical Scoping

Ans : https://interview-preparation-for-you.blogspot.com/2018/12/lexical-scope.html

What is benifit of => fat arrow

Ans : https://interview-preparation-for-you.blogspot.com/2021/06/benefit-of-arrow-function.html

What is new in ES 6

Ans : https://interview-preparation-for-you.blogspot.com/2018/12/what-is-new-in-es6.html

Write the UML diagram of any pattern you have used

Write the code for Singleton pattern

Diff between let and var

Ans : https://interview-preparation-for-you.blogspot.com/2018/08/difference-between-var-and-let.html

Explain prototype why and when

Ans : https://interview-preparation-for-you.blogspot.com/2018/12/prototype-in-javascript.html

Explain Nocnflict

Ans : https://interview-preparation-for-you.blogspot.com/2018/04/noconflicy.html

Why we use use strict

Ans : https://interview-preparation-for-you.blogspot.com/2021/06/use-of-strick.html

If this keyword used globally in js file than which object it will refer.

Ans  Window

UML diagram of singleton/Factory

Agile methodology  which approach we use top down and bottom up

Ans : https://interview-preparation-for-you.blogspot.com/2021/06/agile-transformation-top-down-vs-bottom.html