Ans: The key features of Angular 8 are as follows:

• Differential Loading to create two different production bundles of your app.
• New Dynamic Lazy Loading modules for imports.
• Supports Web Workers.
• Supports TypeScript version 3.4.
• Availability of New Workspace APIs and Builder.
• Bazel Support.
• Opt-In usage sharing.
• Ivy Rendering Engine: The new compiler for Angular version 8.
• ngUpgrade improvements.

Ans: Yes, Angular version 8 supports TypeScript 3.4 because it is mainly used to run the Angular 8 projects. Everything in Angular version 8 is written in TypeScript. So you need to upgrade your TypeScript version to 3.4.

Ans: Ivy in Angular version 8 is considered as the Rendering Engine. It was released in Angular 8 as Opt-in. It has opted as the code name for Angular’s next-generation rendering pipeline and compilation. By default, Ivy is intended to be the rendering engine in Angular 9

Ans: Bazel is one of the key features present in Angular version 8. It always allows you to build CLI applications quickly. Bazel is considered a built tool that is developed and mostly used by Google as it can build applications in any language. The entire Angular framework is built with Bazel. Moreover, Bazel allows you to break an application into different build units which are defined at the NgModule level.

Ans: Codelyzer in Angular version 8 is the open-source tool that is present on the top of the TSLint. The main purpose of Codelyzer is to verify whether the Angular TypeScript 3.4 projects are following the set of linting rules or not. It mainly focuses on the static code in Angular TypeScript. In simple words, we can say that the main purpose of the Codelyzer in Angular version 8 is to check the quality and correctness of the program.

Ans: The main purpose of the Wildcard Router in Angular version 8 is to match every URL as an instruction to get a clear client-generated view. This Wildcard route always comes last as it needs to perform its task at the end only. It is mainly used to define the route of the pages in Angular 8.

Ans: The ng -version command is used to check the current version of Angular CLI.

Ans: The following are the key advantages of Bazel, and they are as follows:

• It provides you the possibility to make both frontends and backends with the same tool.
• Availability of incremental build and test options.
• In Bazel, you have the possibility for cache and remote builds on the build farm.

Ans: The web workers in Angular version 8 are mainly used to speed up the work of the things in your application during the working of CPU. These web workers mainly allow you to run the CPU computations in a background thread. This, in turn, helps the main thread to free up and then update the user interface.

Ans: The main difference between Angular 8 and Angular 7 are as follows:

Ans: The command ng serve is used to run and load the Angular App.

Ans: The key parts of the Angular 8 Architecture are as follows:

• Modules
• Components
• Templates
• MetaData
• Data-Binding
• Directives
• Services
• Dependency Injection

Ans: The components in Angular 8 are the list of classes with decorators that mainly mark their own types and provide metadata to guide Angular to do things. Every application in Angular has at least one component called a root component. This root component is mainly used to connect page hierarchy with page DOM.

Ans: NgModules in Angular version 8 varies from other JavaScript modules. Each and every Angular app has at least one module called AppModule. The NgModule provides a bootstrap mechanism to launch different applications. Commonly, every Angular App contains many functional modules to do things. The key features of Angular 8 modules are as follows:

• Own functionality of the NgModule can be exported and can also be used by other NgModules.
• Angular 8 NgModule can import functionalities from other NgModules.

Ans: NgUpgrade is the library present in the Angular version 8. This upgrade library is mainly used to integrate both AngularJS and Angular components in the application. Moreover, NgUpgrade also helps you in bridging the gap between the Dependency Injection Systems in both AngularJS and Angular.

Ans: The npm install -g @angular/cli@latest is the command which is used to install the latest version of Angular CLI.

Ans: The nglf directive is a structural directive present in Angular Version 8. This directive is mainly used to add or remove HTML elements based on the expression statement. The functioning of the nglf directive is observed when the expression is true the element is added and when the expression is false the element is removed using nglf directive.

Ans: The typeofchecks plays a key role in Angular 8, it is mainly used to check the type of value assigned to the variable the same as that of JavaScript. You can even test the value assigned to the object by using typeofchecks in version 8.

Ans: It is also a Structural directive present in Angular Version 8. The ngSwitch directive is mainly used to add or remove HTML DOM elements. It is much similar to the switch statement of C#. This directive is applied to a container element with the help of a switch expression.

Ans: Data Binding in Angular version 8 is considered as the key concept, that is mainly used to build the communication between the DOM and the TypeScript code of your component. It is the most prominent technique used to link your data to the view layer. Data Binding also defines interactive applications very quickly and easily. It can be achieved either by one-way binding or two-way binding.

Ans: String Interpolation in Angular version 8 comes under the one-way Data Binding technique, it is mainly used to output or extract the data from a TypeScript coding to HTML template view layer. It represents the data from the component to view layer in the form of curly braces. This interpolation technique adds the value of property to the component.

Example for String Interpolation is {{data}}

Ans: Event Binding technique is mainly used to handle the events that are raised from DOM like mouse move, button click, and many more in Angular version 8. When the DOM event occurs, at that moment only the specified method is called in the component.

Ans: The main use of Angular 8 forms is to handle the user’s input. These forms can also be used in your applications to enable the user to login, enter personal info, update profile, perform various tasks related to data entry, and many more. Basically, there are two approaches to handle the user’s input by using forms. The two approaches are used to collect the user inputs from the view layer and they also provide the way to track different changes.

Ans: The reactive forms are used in Angular 8 because of the following features. They are:

• Reactive forms are testable, scalable, and reusable.
• They are more robust.
• They are mostly preferred when the forms are considered as the key part of your application.

Ans: In the following cases the template-driven forms are needed in Angular 8.

• If you want to add just a simple form to your application you need template-driven forms.
• They are very easy to use in the applications but they are not scalable.
• If any of your applications require a very basic logic and form then you must make use of template-driven forms.

Ans: The syntax to create an application in Angular version 8 is

ng new app_name

Ans: The npm install -g @angular/cli is the command used to install Angular CLI.

Ans: The Angular Universal is defined as the process of SSR (server-side rendering) of your particular application to HTML present on the Server. Basically, all the Angular applications are single-page applications so the rendering always occurs on the browser. The entire process of rendering single-page applications is known as the client-side rendering process (CSR).

Ans: The following are the advantages of Angular 8, and they are as follows:

• Higher performance
• Effective clean code development
• debugging templates
• Angular 8 supports multiple apps in a single domain.
• easier implementation.