Top 10 Interview Questions and Answered for Web Developer of 2020

Hello, today I would like to present a top 10 of web developer interview questions answered.

Don't forgot to save the post 😊😚 Ref : codinggame.com

Q1 : What is Coercion in JavaScript ?

Type coercion is the process of converting value from one type to another.

Q2 : What is blockchain ?

Blockchain is a secure distributed ledger (data structure or database) that maintains a continuously growing list of ordered records, called “blocks”, that are linked using cryptography.

Q3 : What is Design Patterns and why anyone should use them ?

Design patterns are a well-described solution to the most commonly encountered problems which occur during software development.

Q4 : What is meant by Continuous Integration ?

CI is a development practice that requires developers to integrate code into a shared repository several times a day. Each check-in is then verified by an automated build, allowing teams to detect problems early.

Q5 : What is npm ?

npm stands for Node Package Manager. It provides 2 main functionalities:
Online repositories for node.js packages/modules which are searchable on search.nodejs.org
Command line utility to install packages, do version management and dependency management of Node.js packages.

Q6 : What is webpack ?

Webpack is a build tool that puts all of your assets, including Javascript, images, fonts, and CSS, in a dependency graph. It lets you use require() in your source code to point to local files.

Q7 : What is Sprint Planning ?

planned at the Sprint Planning. This plan is created by the collaborative work of the entire Scrum Team.
Sprint Planning answers the following : - What can be delivered in the Increment resulting from the upcoming Sprint? - How will the work needed to deliver the Increment be achieved?

Q8 : What is test driven development ?

In this method, developer first writes an automated test case which describes new function or improvement and then creates small codes to pass that test.

Q9 : Explain Null and Undefined in JavaScript

undefined : Something hasn't been initialized.
null : Something is currently unavailable.

Q10 : What is the difference between span and div?

div is a block elemt
span is inline elemt