Angular Mastery: Dive into the Ultimate MCQ Challenge!

Ready to prove your Angular prowess? Embark on our comprehensive MCQ challenge covering core Angular concepts, from two-way data binding to dependency injection and beyond. Perfect for both novice developers and seasoned Angular enthusiasts looking to refresh their knowledge

1 / 25

How do you optimize performance in Angular applications?

By using techniques like AOT compilation, lazy loading, and ChangeDetectionStrategy.OnPush.

They allow data to be passed into and out of a component.

To decide if a route can be activated or deactivated.

A cohesive block of code dedicated to an application domain, a workflow, or a closely related set of capabilities.

2 / 25

Describe the concept of change detection in Angular.

It checks for changes in the data properties and reflects them in the view.

Using the Angular CLI with the 'ng generate service' command or by manually creating a service class with @Injectable() decorator.

It provides an execution context for JavaScript code, and Angular runs inside a zone.

Using Angular's i18n tools.

3 / 25

What is the role of zones in Angular?

It provides an execution context for JavaScript code, and Angular runs inside a zone.

Using the Angular CLI with the 'ng generate service' command or by manually creating a service class with @Injectable() decorator.

To decide if a route can be activated or deactivated.

Classes that handle HttpRequest and HttpResponse to modify or handle them.

4 / 25

How do you handle errors in Angular?

Using catchError operator in RxJS or ErrorHandlers.

It converts Angular HTML and TypeScript code into JavaScript and HTML during build phase, before the browser downloads and runs the code.

Using the Angular CLI with the 'ng generate service' command or by manually creating a service class with @Injectable() decorator.

Using Angular's i18n tools.

5 / 25

Explain the significance of Angular’s Ahead-of-Time (AOT) compilation.

It converts Angular HTML and TypeScript code into JavaScript and HTML during build phase, before the browser downloads and runs the code.

A web application framework for building dynamic apps.

Using Angular's i18n tools.

Using Angular's RouterModule and configuring a Router with Routes.

6 / 25

What are Angular interceptors used for?

Classes that handle HttpRequest and HttpResponse to modify or handle them.

Using @Input() for data flow from parent to child and @Output() for child to parent.

It's a technique that allows Angular to load feature components when needed, rather than all at once.

Using Angular's i18n tools.

7 / 25

How do you implement internationalization (i18n) in Angular?

Using Angular's i18n tools.

Using Angular's HttpClient module.

It provides an execution context for JavaScript code, and Angular runs inside a zone.

To decide if a route can be activated or deactivated.

8 / 25

Describe the purpose of Angular pipes.

They transform displayed values within templates.

Using catchError operator in RxJS or ErrorHandlers.

By using techniques like AOT compilation, lazy loading, and ChangeDetectionStrategy.OnPush.

Using the Angular CLI with the 'ng generate service' command or by manually creating a service class with @Injectable() decorator.

9 / 25

How do you communicate between parent and child components?

Using @Input() for data flow from parent to child and @Output() for child to parent.

By using techniques like AOT compilation, lazy loading, and ChangeDetectionStrategy.OnPush.

A design pattern in which a class receives its dependencies from external sources rather than creating them internally.

A lifecycle hook that initializes the directive/component after Angular first displays the data-bound properties.

10 / 25

What are Angular guards used for?

To decide if a route can be activated or deactivated.

Classes that handle HttpRequest and HttpResponse to modify or handle them.

Using Angular's HttpClient module.

A cohesive block of code dedicated to an application domain, a workflow, or a closely related set of capabilities.

11 / 25

Explain the concept of lazy loading in Angular.

It's a technique that allows Angular to load feature components when needed, rather than all at once.

Using @Input() for data flow from parent to child and @Output() for child to parent.

Using Angular's HttpClient module.

Using Reactive Forms or Template-driven forms.

12 / 25

How do you handle forms in Angular?

Using Reactive Forms or Template-driven forms.

They allow data to be passed into and out of a component.

Using Angular's RouterModule and configuring a Router with Routes.

A lifecycle hook that initializes the directive/component after Angular first displays the data-bound properties.

13 / 25

Describe how Observables are used in Angular.

Asynchronous helpers that provide a way to handle asynchronous operations.

It checks for changes in the data properties and reflects them in the view.

A web application framework for building dynamic apps.

They allow data to be passed into and out of a component.

14 / 25

What is the significance of `@Input()` and `@Output()` in Angular?

They allow data to be passed into and out of a component.

It allows automatic synchronization between the model and view components.

To decide if a route can be activated or deactivated.

It's a structural directive that conditionally includes a template based on the value of an expression.

15 / 25

How can you fetch data from an API in Angular?

Using Angular's HttpClient module.

To decide if a route can be activated or deactivated.

A lifecycle hook that initializes the directive/component after Angular first displays the data-bound properties.

It converts Angular HTML and TypeScript code into JavaScript and HTML during build phase, before the browser downloads and runs the code.

16 / 25

What is the role of `ngOnInit` in Angular?

A lifecycle hook that initializes the directive/component after Angular first displays the data-bound properties.

It allows automatic synchronization between the model and view components.

Classes that handle HttpRequest and HttpResponse to modify or handle them.

Using catchError operator in RxJS or ErrorHandlers.

17 / 25

Explain the purpose of the `ngIf` directive.

It's a structural directive that conditionally includes a template based on the value of an expression.

It converts Angular HTML and TypeScript code into JavaScript and HTML during build phase, before the browser downloads and runs the code.

To decide if a route can be activated or deactivated.

Classes that handle HttpRequest and HttpResponse to modify or handle them.

18 / 25

What are directives in Angular?

Classes that add/modifies behavior of elements in Angular templates.

Using Angular's i18n tools.

They allow data to be passed into and out of a component.

They transform displayed values within templates.

19 / 25

How do you set up routing in Angular?

Using Angular's RouterModule and configuring a Router with Routes.

They transform displayed values within templates.

It converts Angular HTML and TypeScript code into JavaScript and HTML during build phase, before the browser downloads and runs the code.

Using catchError operator in RxJS or ErrorHandlers.

20 / 25

What is an Angular module?

A cohesive block of code dedicated to an application domain, a workflow, or a closely related set of capabilities.

It's a technique that allows Angular to load feature components when needed, rather than all at once.

They transform displayed values within templates.

It provides an execution context for JavaScript code, and Angular runs inside a zone.

21 / 25

Describe dependency injection in Angular.

A design pattern in which a class receives its dependencies from external sources rather than creating them internally.

A web application framework for building dynamic apps.

They transform displayed values within templates.

It allows automatic synchronization between the model and view components.

22 / 25

How do you create a service in Angular?

Using the Angular CLI with the 'ng generate service' command or by manually creating a service class with @Injectable() decorator.

It provides an execution context for JavaScript code, and Angular runs inside a zone.

To decide if a route can be activated or deactivated.

A web application framework for building dynamic apps.

23 / 25

What is two-way data binding in Angular?

It allows automatic synchronization between the model and view components.

They transform displayed values within templates.

Classes that handle HttpRequest and HttpResponse to modify or handle them.

It converts Angular HTML and TypeScript code into JavaScript and HTML during build phase, before the browser downloads and runs the code.

24 / 25

How does Angular differ from AngularJS?

Angular is a complete rewrite from AngularJS and uses TypeScript.

Using the Angular CLI with the 'ng generate service' command or by manually creating a service class with @Injectable() decorator.

They transform displayed values within templates.

It provides an execution context for JavaScript code, and Angular runs inside a zone.

25 / 25

What is the primary use of Angular?

A web application framework for building dynamic apps.

A design pattern in which a class receives its dependencies from external sources rather than creating them internally.

Angular is a complete rewrite from AngularJS and uses TypeScript.

Using Angular's RouterModule and configuring a Router with Routes.

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