Top 30 important interview questions in Angular | Angular interview questions | nihira techiees

#angular #angularQA #angularcli Top 30 important interview questions in angular 13 Angular 13 playlist ================ https://youtube.com/playlist?list=PLfyWdpsiUiPAcHftMr_R0HwSyAVHCW5cR RxJS in Angular - Playlist ======================= https://youtube.com/playlist?list=PLfyWdpsiUiPDuxyDGqAoq0l_T6NlRZq6C Authentication in Angular - Playlist ============================== https://youtube.com/playlist?list=PLfyWdpsiUiPD7kYHujLg3Vl6GV69yQPgD GitHub link for document ===================== https://github.com/nihira2020/Documents/blob/main/Interview%20questions.pptx 1, What is angular & advantages of angular 1, Angular is a Typescript-based free and open-source web application framework 2, Provided by Google , having long term support 3, Cross-Platform Development. 4, Improved Speed and Performance. 5, Faster Development Process. 6, Readable and Testable Code. 7, More Lightweight Web Applications. 2, How to identify Angular app version & Angular CLI Version? 1, ng version 2, For application version check package.json 3, What is the default port? how can we change the port? 1, default port number 4200 2, use the command ng serve –port 3000 3, Add "start": "ng serve --port 3000“ in package.json under scripts 4, Add port with value in angular.json 4, What is Interpolation? 1, This is the kind one way data binding , syntax {{data}} 5, What is pipes? 1, pipes are nothing but text formatter 2, basically its works like function it will take input and return the output 6, What is property binding? 1, it’s used to set values of properties 2, syntax [] 7, Diff b/w property binding & Interpolation? 1, Property binding does not convert the expression result to a string 2, property binding is suitable for bind disable, checked 8, What is module? 1, place where you can group the components, directives, pipes, and services, which are related to the application 2, It is defined using ngModule ng generate module [module-name] –routing 9, what is directive? 1, Directives are classes that add additional behavior to elements in your Angular applications. 2, Components directives Structural directives Attribute directives 10, What is routing? 1, routing is an URL pattern matching 2, Used to handle the navigation from one view to the next Routes – this is the class used to map the component & path router-outlet – this is the place to load the active component routerLink - this is the directive to navigate different route 11, What is child routing? 1, Creating new Route inside the another Route 12, What is angular route guard? 1, Angular Route Guard is an interface which can be implemented to decide if a route can be activated 2, used to implement authentication 13, what is services? 1, typescript class to have injectable decorator 2, It can be injected into many components 3, Used to consume http services also transfer the data b/w components 14, What http interceptor? 1, This is also kind of service class 2, used this one we can modify the http request, we can pass auth header value 15, Can we develop angular without VS Code? 1, Yes, we can develop angular using any source code editor 16, How to transfer data between component? 1, Parent to Child using @Input 2, Child to parent using @output 3, transfer bidirectional @viewchild 4, using services 17, What is forms in angular? 1, Forms are used to handle user input data 2, basically we have 2 types * Template driven form * Reactive forms 18, Can we use bootstrap in angular? How? 1, Yes, we can use ngbootstrap 19, What is reactive form? 1, Reactive forms provide a model-driven approach to handling form inputs whose values change over time. 2, we can handle validations & logics from ts file itself 20, What is TDF in angular? 1, Template-driven forms use two-way data binding to update the data model in the component as changes are made in the template and vice versa. 21, Diff b/w reactive & TDF? 1, Template Driven Forms are based only on template directives, while Reactive forms are defined programmatically at the level of the component class. 21, What is two way binding? 1, Two-way binding means that any data-related changes in view updated to modal similarly modal data change updated to all views 2, syntax is [()]