Angular 8 Interview Questions and Answers

In Angular 8, Bazel is a new build system and it is available for a short period of time. It is the new feature of Angular 8, which provides a platform to make your backends and frontends with a similar tool. It has the possibility to have remote builds as well as cache on the build farm.

The main features of Bazel are-

• It is an internal build tool, through which application can be customized.
• It also tests the action and performance of multiple machines.
• It constructs a graph through which you can identify the useful information.
• It also supports customization.

Wildcard routing is used in Angular 8 for defining the route of pages. Specific changes/updates can be made when defining the route using Wildcard.

Codelyzer is an open-source tool in Angular 8 whose main function is to check for errors in codes not following pre-defined guidelines. It runs on the tslint.json file and checks only the static code in Angular 8.

Angular 8 it has following new features such as

• Differential loading- It is a technique that automatically makes your angular applications more performant. When you build applications for production, two bundles are created- One bundle for Modern browsers that support ES6+ and another bundle for older browsers that only support ESS.
• Dynamic imports for lazy routes- In Angular version 8 there is nothing new in the concept of lazy routes itself but the syntax has totally changed. In the older version of Angular CustomString Syntax is used, but angular 8 uses standard dynamic import syntax so the syntax which is customized to Angular is migrated to industrial standard.
• Ivy rendering Engine- It translates the templates and components into regular HTML and javascript that the browser can interpret and understand.
• Bazel- It is a building tool through which angular developer can build backends and frontends.

Here are the limitations of a Web Worker:

• A web worker cannot directly manipulate the DOM
• It has limited access to methods and properties of the window object.
• It cannot be run directly from the file system. A web worker needs a server to run.

Angular 8 has advanced level features which ensure systematic workflow and performance improvements. It has apparent features such as differential loading, CLI workflow improvements, Dynamic imports for lazy routes, Ivy rendering engine, Bazel, etc.

A Service Worker is used in Angular 8 to build the basic steps of converting an application into a Progressive Web App (PWA). Service workers function as network proxies and intercepting all outgoing HTTP requests made by the application and how to respond.

Steps to upgrade Angular 7 to 8

• Install TypeScript 3.4
• Use Node LTS 10.16 or its advanced version
• Run command on terminal panel/CLI -> ng update @angular/cli@angular/core

Alternative- use URL link- https://update.angular.io/