Short Question / One Mark Question
Angular is
a popular open-source JavaScript framework developed and maintained by Google.
It is used for building web applications, specifically single-page applications
(SPAs), and provides a structured approach to application development. Angular
follows the Model-View-Controller (MVC) architectural pattern and aims to
simplify the development process by providing a robust framework and a set of
tools.
1. What
is the latest version of Angular?
As of my knowledge cutoff in May 2023, the latest
stable version of Angular is Angular 16. However, please note that the
information may have changed, and newer versions might be available at the time
you're reading this.
2. What
are the key features of Angular?
Angular offers several key features, including two-way
data binding, dependency injection, component-based architecture, modular
development, declarative templates, and a powerful command-line interface (CLI)
for scaffolding and building projects.
3. What
programming language does Angular use?
Angular is primarily written in TypeScript, which is a
superset of JavaScript. TypeScript provides static typing, enhanced tooling
support, and other features that help catch errors and improve productivity
during development.
4. How
does Angular differ from AngularJS?
AngularJS, often referred to as Angular 1, is a
previous version of Angular. Angular (versions 2 and above) is a complete rewrite
of AngularJS and introduces significant changes in terms of architecture,
performance, and features. Angular is more modular, has improved performance,
and embraces modern web development practices.
5. What
is the Angular CLI?
The Angular Command Line Interface (CLI) is a powerful
tool that simplifies the process of creating, developing, and deploying Angular
applications. It provides commands for generating components, services,
modules, and other project artifacts, as well as building, testing, and serving
the application during development.
6. How
can I install Angular CLI?
Once you have Node.js and npm installed, you can
install the Angular CLI (Command Line Interface) globally on your system using
npm. Open a command prompt or terminal and run the following command:
npm install
-g @angular/cli
This will
install the Angular CLI globally, allowing you to use it from any command prompt
or terminal window.
7. How
can I create a new Angular project?
After installing the Angular CLI, you can create a new
Angular project using the `ng new` command. Open a command prompt or terminal,
navigate to the desired directory, and run the following command:
ng new
my-angular-app
Replace
"my-angular-app" with the desired name for your project. The Angular
CLI will generate a new project structure with all the necessary files and
dependencies.
8. How
can I run my Angular application?
Once your Angular project is created, navigate into
the project's directory using the command prompt or terminal. Run the following
command to start the development server and run your application:
ng serve
By default,
the application will be served at http://localhost:4200. You can open this URL
in your web browser to see your Angular application running.
These are basic steps to set up the Angular
development environment and create a new project. For more advanced
configurations and options, refer to the official Angular documentation, which
provides detailed instructions and explanations.
---------------------------------------------------------------------------------------------
Folder
Structure of an Angular
1.
src:
This is the main folder that contains the source code of your Angular
application. It includes the following subfolders:
- app: This
folder contains the components, modules, services, and other
application-specific code. The app folder usually has subfolders such as:
-
components: This folder contains Angular components that make up your
application's UI.
- services:
This folder contains Angular services that provide functionality and data to
your components.
- modules:
This folder contains Angular modules that help organize and encapsulate related
components and services.
- assets:
This folder is used to store static assets such as images, fonts, and other
files that are needed by your application.
-
environments: This folder contains environment-specific configuration files. By
default, there are two files: environment.ts for development and
environment.prod.ts for production. You can define environment-specific
variables and settings in these files.
- index.html:
This is the main HTML file that serves as the entry point for your Angular
application.
- main.ts:
This is the main TypeScript file that bootstraps your Angular application.
2.
e2e:
This folder contains end-to-end (e2e) tests for your application. It's mainly
used for testing the application's functionality from the user's perspective.
3.
node_modules:
This folder contains the dependencies and libraries that your Angular
application relies on. It is created and managed by npm (Node Package Manager)
when you install packages.
4.
angular.json:
This file is the configuration file for your Angular project. It defines
various build and development settings, such as the project's root, assets
configuration, build options, and more.
5.
package.json:
This file contains metadata about your Angular project, including its
dependencies, scripts, and other project-related information. It is used by npm
to manage the project's packages and scripts.
6. tsconfig.json: This file contains
TypeScript compiler configuration options for your Angular project. It
specifies how TypeScript files should be compiled into JavaScript.
---------------------------------------------------------------------------------------------
About decorators in Angular
1. What
are decorators in Angular?
Decorators are a TypeScript feature used in
Angular to enhance classes, properties, methods, and other elements. Decorators
provide a way to add metadata and modify the behavior of these elements at
runtime. In Angular, decorators are used extensively to configure and customize
various aspects of components, services, modules, and more.
2. How
are decorators used in Angular?
Decorators are applied using the `@` symbol
followed by the decorator's name, placed immediately before the element being
decorated. For example, `@Component`, `@NgModule`, and `@Injectable` are common
decorators used in Angular to decorate classes.
3. What
are some commonly used decorators in Angular?
- `@Component`: Used to decorate a class as
an Angular component and define its template, styles, selector, and other
properties.
- `@Directive`: Used to decorate a class as
an Angular directive and define its behavior and usage.
- `@NgModule`: Used to decorate a class as
an Angular module and configure its dependencies, providers, and declarations.
- `@Injectable`: Used to decorate a class as
an Angular service and make it injectable through Angular's dependency
injection mechanism.
- `@Input` and `@Output`: Used to decorate
properties of a component to mark them as input and output bindings, respectively.
- `@ViewChild` and `@ContentChild`: Used to
decorate properties of a component to access child components or elements.
4. Can I
create custom decorators in Angular?
Yes, you can create custom decorators in
Angular by defining your own decorator functions using the `function` keyword
and applying them to classes, properties, or methods. Custom decorators allow
you to extend Angular's functionality and add custom behavior to your
application.
Remember
that decorators are a powerful tool in Angular development, allowing you to add
metadata, modify behavior, and customize various elements of your application.
Understanding decorators is essential for effectively using and extending
Angular's capabilities.
---------------------------------------------------------------------------------------------
Angular
Directives
Directives in
Angular are markers on a DOM element that instruct Angular to manipulate the
element or modify its behavior. Directives are used to extend HTML with new
features and create reusable components.
There are three
types of directives in Angular:
1. Component
Directives: These are the most common directives in Angular and are used to
create reusable components. Components are directives with an associated
template. They have their own view and data logic and can be used as custom
HTML elements in your application.
Example:
`<app-custom-component></app-custom-component>`
2. Attribute
Directives: These directives are used to change the behavior or appearance of
an element by applying custom logic to the element's attributes. Attribute
directives are applied as attributes to existing elements.
Example:
`<input type="text" appCustomDirective>`
3. Structural
Directives: Structural directives change the structure of the DOM by adding,
removing, or manipulating elements. They are typically used for conditionally
rendering elements or repeating a section of HTML based on a collection.
Example:
```html
<div
*ngIf="showElement">Element is shown</div>
<ul>
<li *ngFor="let item of
items">{{ item }}</li>
</ul>
```
Angular Pipes:
Pipes in
Angular are a way to transform data before displaying it in the view. Pipes
take in data as input and transform it into the desired output format. They can
be used to format dates, numbers, currency, and perform other data
manipulations.
Angular provides
several built-in pipes, such as `DatePipe`, `UpperCasePipe`, `LowerCasePipe`,
`CurrencyPipe`, and `DecimalPipe`. You can also create custom pipes to meet
specific requirements.
Example usage
of built-in pipes:
```html
<p>{{
date | date:'dd/MM/yyyy' }}</p>
<p>{{
text | uppercase }}</p>
<p>{{
price | currency:'USD':true }}</p>
<p>{{
number | number:'2.2-2' }}</p>
```
To use a pipe, you apply it to a value in the
template using the pipe operator `|`. The value to be transformed is placed
before the pipe, and the pipe's arguments (if any) are placed after the colon.
---------------------------------------------------------------------------------------------
Angular routing
and services
1. Q: What is
Angular routing and how does it work?
A: Angular routing is a mechanism that
allows you to navigate between different views (components) in an Angular
application. It works by mapping URL paths to specific components, allowing you
to display different components based on the current URL.
2. Q: How do
you set up routing in an Angular application?
A: To set up routing in an Angular
application, you need to import the RouterModule and Routes modules, define
routes using the RouterModule.forRoot() method, and add the RouterModule to the
app's imports array in the app.module.ts file.
3. Q: What is a
route configuration in Angular?
A: A
route configuration in Angular defines the mapping between URL paths and
components. It specifies the path, component, and optional parameters for each
route.
4. Q: How do
you define a route with parameters in Angular?
A: Route parameters in Angular are defined
by prefixing a parameter name with a colon in the route's path definition. For
example, `path: 'users/:id'` defines a route parameter named "id".
5. Q: How can
you pass parameters to a route in Angular?
A: You can pass parameters to a route in
Angular by including them in the URL when navigating or by using the
ActivatedRoute service to retrieve them in the component.
6. Q: How do
you define child routes in Angular?
A: Child routes in Angular are defined by
nesting route configurations within a parent route configuration. You can use
the children property to specify an array of child routes.
7. Q: How do
you navigate to a specific route in Angular?
A: You can navigate to a specific route in
Angular by using the Router service and calling its navigate() method, passing
the desired route path as an argument.
8. Q: What is a
route guard in Angular?
A: A route guard in Angular is a mechanism
that allows you to control access to a route. It can prevent navigation to a
route, activate a route conditionally, or prompt the user for confirmation
before navigating.
9. Q: How do
you implement route guards in Angular?
A: To implement route guards in Angular, you
need to create a guard class that implements the CanActivate or CanActivateChild
interface, and then add the guard to the canActivate or canActivateChild
property of the route configuration.
10. Q: What is
lazy loading in Angular routing?
A: Lazy loading in Angular routing is a
technique that allows you to load modules and their associated routes only when
they are needed. It helps improve the initial loading time of your application.
11. Q: How do
you implement lazy loading in Angular routing?
A: To implement lazy loading in Angular
routing, you need to create a separate module for the lazy-loaded component(s),
configure a route for the module, and use the loadChildren property in the
parent route configuration to specify the path to the module.
12. Q: What are
route resolvers in Angular?
A: Route resolvers in Angular are services
that are used to fetch data before navigating to a route. They ensure that the
required data is available before the component is rendered.
13. Q: How do
you implement a route resolver in Angular?
A: To implement a route resolver in Angular,
you need to create a resolver service that implements the Resolve interface,
define a resolve() method in the service to fetch the required data, and add
the resolver to the resolve property of the route configuration.
14. Q: What are
query parameters in Angular routing?
A: Query parameters in Angular routing are
additional parameters added to the URL after a question mark (?). They
are used to pass optional data to a route.
15. Q: How do
you handle query parameters in Angular routing?
A: Query parameters in Angular routing can
be accessed using the ActivatedRoute service. You can subscribe to the
queryParamMap observable to retrieve and react to changes in the query
parameters.
16. Q: What are
route events in Angular?
A: Route events in Angular are events that
are emitted during the navigation lifecycle. They allow you to track and
respond to different stages of navigation, such as when a route is activated,
deactivated, or when an error occurs.
17. Q: How can
you subscribe to route events in Angular?
A: To subscribe to route events in Angular,
you can use the Router service and its events property, which provides
observables for different route events. You can subscribe to these observables
to perform actions based on the events.
18. Q: What is
the purpose of the ActivatedRoute service in Angular?
A: The ActivatedRoute service in Angular
provides information about the currently activated route. It allows you to
access route parameters, query parameters, and other route-related data in the
component.
19. Q: What are
Angular services?
A: Angular services are classes that
provide common functionality and can be injected into components or other
services. They promote reusability, maintainability, and separation of concerns
in an Angular application.
20. Q: How do
you create and use a service in Angular?
A: To create a service in Angular, you can
use the CLI command `ng generate service serviceName`. Once created, you can
inject the service into components or other services using the constructor and
use its methods and properties.
21. How do you
inject a service into an Angular component?
Angular provides a dependency injection
mechanism to inject services into components. You can inject a service into a component
by declaring it as a parameter in the component's constructor. Angular's
dependency injection system takes care of creating an instance of the service
and providing it to the component.
22. What are
the benefits of using services in Angular?
Using services in Angular offers several
benefits:
- Code reusability: Services allow you to
encapsulate and reuse common functionality across multiple components.
- Separation of concerns: Services promote a
modular and organized architecture by separating business logic and data
manipulation from the component's view-related tasks.
- Testability: Services can be easily unit
tested independently of components, making it simpler to write comprehensive
tests for your application.
- Centralized data management: Services can
manage shared data and state, allowing components to communicate and
synchronize their data through a centralized service.
---------------------------------------------------------------------------------------------
1. What is
Angular?
Answer: Angular
is a TypeScript-based open-source web application framework used for building
dynamic web applications.
2. What is the
latest version of Angular?
Answer: As of
my knowledge cut-off date (May 2023), the latest version of Angular is 16.
3. What is a
component in Angular?
Answer: A
component is a building block of an Angular application that represents a UI
element.
4. What is the
purpose of the NgModule decorator?
Answer: The
NgModule decorator is used to define a module in an Angular application.
5. What is
dependency injection in Angular?
Answer:
Dependency injection is a design pattern in Angular that allows you to inject
dependencies into components, services, and other objects.
6. What is a
service in Angular?
Answer: A
service is a class in Angular that can be used to share data and functionality
across different components in an application.
7. What is the
use of interpolation in Angular?
Answer:
Interpolation is used to display dynamic data in an Angular application.
8. What is the
purpose of the router module in Angular?
Answer: The
router module in Angular is used to handle navigation between different
components in an application.
9. What is the
use of ngModel directive in Angular?
Answer: The
ngModel directive is used to create a two-way binding between the view and the
model in an Angular application.
10. What is the
purpose of the OnInit interface in Angular?
Answer: The
OnInit interface in Angular is used to implement the ngOnInit lifecycle hook,
which is called when a component is initialized.
11. What is the
purpose of the ngFor directive in Angular?
Answer: The
ngFor directive is used to iterate over a collection of items and create a
template for each item.
12. What is the
difference between ngOnChanges and ngOnInit in Angular?
Answer:
ngOnChanges is called when a component property is changed, whereas ngOnInit is
called when the component is initialized.
13. What is the
purpose of the ngIf directive in Angular?
Answer: The
ngIf directive is used to conditionally render a part of the template based on
a Boolean expression.
14. What is the
purpose of the HttpClient module in Angular?
Answer: The
HttpClient module in Angular is used to make HTTP requests to a server.
15. What is the
use of the async pipe in Angular?
Answer: The
async pipe is used to handle asynchronous data in an Angular application.
16. What is the
purpose of the EventEmitter class in Angular?
Answer: The
EventEmitter class is used to create custom events in an Angular application.
17. What is a
directive in Angular?
Answer: A
directive is a class in Angular that can be used to add behavior to an existing
element or component.
18. What is the
difference between a template-driven form and a reactive form in Angular?
Answer:
Template-driven forms are based on HTML templates, whereas reactive forms are
based on reactive programming principles.
19. What is the
use of the ngClass directive in Angular?
Answer: The
ngClass directive is used to add or remove CSS classes based on a condition in
an Angular application.
20. What is the
purpose of the pipe operator (|) in Angular?
Answer: The
pipe operator is used to apply a transformation to a value in an Angular
template.
---------------------------------------------------------------------------------------------
1. What is the
difference between a module and a component in Angular?
Answer: A
module is a container for a group of related components, directives, pipes, and
services, while a component is a building block of an Angular application that
represents a UI element.
2. What is a
template in Angular?
Answer: A
template in Angular is a piece of HTML code that is used to define the UI of a
component.
3. What is a
decorator in Angular?
Answer: A
decorator in Angular is a special type of function that is used to add metadata
to a class, function, property, or parameter.
4. What is the
difference between a constructor and ngOnInit in Angular?
Answer: The
constructor is called when a component is instantiated, while ngOnInit is
called when the component is initialized.
5. What is a
directive in Angular?
Answer: A
directive in Angular is a class that can be used to add behavior to an existing
element or component.
6. What is a
service in Angular?
Answer: A
service in Angular is a class that can be used to share data and functionality
across different components in an application.
7. What is the
use of the @Input decorator in Angular?
Answer: The
@Input decorator is used to pass data from a parent component to a child
component.
8. What is the
use of the @Output decorator in Angular?
Answer: The
@Output decorator is used to emit events from a child component to a parent
component.
9. What is the
purpose of the RxJS library in Angular?
Answer: The
RxJS library in Angular is used to handle asynchronous data streams and events.
10. What is the
difference between a reactive form and a template-driven form in Angular?
Answer:
Reactive forms are based on reactive programming principles and are built
programmatically, while template-driven forms are based on HTML templates and
are built declaratively.
11. What is the
use of the FormBuilder service in Angular?
Answer: The FormBuilder
service in Angular is used to create reactive forms programmatically.
12. What is the
purpose of the subscribe method in Angular?
Answer: The
subscribe method is used to subscribe to an observable and handle the emitted
values.
13. What is the
purpose of the map operator in Angular?
Answer: The map
operator in Angular is used to transform the emitted values of an observable.
14. What is the
purpose of the async/await syntax in Angular?
Answer: The
async/await syntax in Angular is used to handle asynchronous code in a
synchronous manner.
15. What is the
use of the ActivatedRoute service in Angular?
Answer: The
ActivatedRoute service in Angular is used to access the current route and its
parameters.
16. What is the
purpose of the ActivatedRouteSnapshot interface in Angular?
Answer: The
ActivatedRouteSnapshot interface in Angular is used to represent the current
state of a route.
17. What is the
difference between a pure and impure pipe in Angular?
Answer: A pure
pipe in Angular is a pipe that is called only when its input data changes,
while an impure pipe is called on every change detection cycle.
18. What is the
purpose of the slice pipe in Angular?
Answer: The
slice pipe in Angular is used to create a new array or string by selecting a
subset of the original data.
19. What is the
use of the HostListener decorator in Angular?
Answer: The
HostListener decorator in Angular is used to add event listeners to a component
or directive.
20. What is the
purpose of the HostBinding decorator in Angular?
Answer: The
HostBinding decorator in Angular is used to bind a property of a component or
directive to a property of its host element.
---------------------------------------------------------------------------------------------
1. What is a
form control in Angular?
Answer: A form
control in Angular is an object that represents the state of an input element.
2. What is a
reactive form in Angular?
Answer: A
reactive form in Angular is a form that is built programmatically using the
ReactiveFormsModule module.
3. What is a
template-driven form in Angular?
Answer: A
template-driven form in Angular is a form that is built declaratively using the
FormsModule module.
4. What is the
purpose of the FormGroup class in Angular?
Answer: The
FormGroup class in Angular is used to group form controls together.
5. What is the
purpose of the FormControl class in Angular?
Answer: The
FormControl class in Angular is used to represent the state of an individual
form control.
6. What is the
purpose of the FormBuilder class in Angular?
Answer: The
FormBuilder class in Angular is used to create reactive forms programmatically.
7. What is the
difference between the patchValue and setValue methods in Angular?
Answer: The
patchValue method in Angular is used to update a subset of the form controls,
while the setValue method is used to update all form controls.
8. What is the
use of the formControlName directive in Angular?
Answer: The
formControlName directive in Angular is used to bind a form control to an input
element.
9. What is the
use of the ngModel directive in Angular?
Answer: The
ngModel directive in Angular is used to bind an input element to a property in
a component.
10. What is the
purpose of the ngSubmit directive in Angular?
Answer: The ngSubmit
directive in Angular is used to handle the form submission event.
11. What is the
use of the ngForm directive in Angular?
Answer: The
ngForm directive in Angular is used to create a form and bind it to a
component.
12. What is the
purpose of the FormGroupDirective class in Angular?
Answer: The
FormGroupDirective class in Angular is used to access the FormGroup instance
associated with a form.
13. What is the
purpose of the FormArray class in Angular?
Answer: The
FormArray class in Angular is used to represent an array of form controls.
14. What is the
use of the formArrayName directive in Angular?
Answer: The
formArrayName directive in Angular is used to bind a FormArray to an array of
input elements.
15. What is the
purpose of the AbstractControl class in Angular?
Answer: The
AbstractControl class in Angular is used as a base class for the FormControl,
FormGroup, and FormArray classes.
16. What is the
purpose of the Validators class in Angular?
Answer: The
Validators class in Angular is used to define validation rules for form
controls.
17. What is the
use of the disabled property in Angular form controls?
Answer: The
disabled property in Angular form controls is used to disable or enable a form
control.
18. What is the
use of the touched property in Angular form controls?
Answer: The
touched property in Angular form controls is used to check if a form control
has been interacted with.
19. What is the
purpose of the ngModelOptions directive in Angular?
Answer: The
ngModelOptions directive in Angular is used to configure the behavior of the
ngModel directive.
20. What is the
use of the async validator in Angular forms?
Answer: The
async validator in Angular forms is used to perform asynchronous validation on
a form control.
---------------------------------------------------------------------------------------------
1.
The ____________ directive is used to conditionally display content in an
Angular template.
Answer:
NgIf
2.
The ____________ directive is used to repeat a set of HTML elements for each
item in a collection.
Answer:
NgFor
3.
The ____________ directive is used to define a reusable piece of HTML that can
be inserted into a component's template.
Answer:
NgTemplate
4.
The ____________ directive is used to project content from a parent component
into a child component's template.
Answer:
NgContent
5.
The ____________ directive is used to bind an event to a method in an Angular
component.
Answer:
Event binding
6.
The ____________ directive is used to bind a property of an HTML element to a
variable in an Angular component.
Answer:
Property binding
7.
The ____________ directive is used to bind the value of an HTML input element
to a variable in an Angular component.
Answer:
Two-way binding
8.
The ____________ directive is used to define a custom structural directive in
Angular.
Answer:
NgDirective
9.
The ____________ directive is used to define a custom attribute directive in
Angular.
Answer:
Directive
10.
The ____________ pipe is used to convert a string to all uppercase letters.
Answer:
Uppercase
11.
The ____________ pipe is used to convert a string to all lowercase letters.
Answer:
Lowercase
12.
The ____________ pipe is used to truncate a string to a specified length.
Answer:
Slice
13.
The ____________ pipe is used to format a number as currency.
Answer:
Currency
14.
The ____________ pipe is used to format a date according to a specified format
string.
Answer:
Date
15.
The ____________ pipe is used to filter an array based on a specified
condition.
Answer:
Filter
16.
The ____________ pipe is used to sort an array based on a specified property.
Answer:
Sort
17.
The ____________ pipe is used to combine multiple arrays into a single array.
Answer:
Concat
18.
The ____________ pipe is used to transform an array into a comma-separated
string.
Answer:
Join
19.
The ____________ pipe is used to limit the number of items displayed in an
array.
Answer:
LimitTo
20.
The ____________ pipe is used to transform a value based on a specified
function.
Answer:
FunctionPipe
---------------------------------------------------------------------------------------------
1.
Directives are used to transform the DOM elements in an Angular application.
Answer:
True
2.
Structural directives are used to add or remove elements from the DOM.
Answer:
True
3.
A component is a type of directive in Angular.
Answer:
True
4.
The asterisk (*) is used to indicate a structural directive in Angular.
Answer:
True
5.
A directive can have multiple bindings.
Answer:
True
6.
Pipes are used to transform the data before it is displayed in the view.
Answer:
True
7.
Pipes can be chained together to perform multiple transformations on the same data.
Answer:
True
8.
The async pipe is used to handle asynchronous data in Angular.
Answer:
True
9.
A directive can be used as an attribute on an element.
Answer:
True
10.
A directive can be used as an element in the DOM.
Answer:
True
11.
The NgIf directive can only be used as an attribute on an element.
Answer:
False (It can be used as an attribute or as a structural directive)
12.
The NgFor directive is a structural directive in Angular.
Answer:
True
13.
A custom directive can only be created using the @Directive decorator.
Answer:
True
14.
A custom pipe can only be created using the @Pipe decorator.
Answer:
True
15.
A pipe can only accept one argument.
Answer:
False (It can accept multiple arguments)
16.
Pipes can be used in both templates and component classes.
Answer:
True
17.
The date pipe can be used to format a date in a specific way.
Answer:
True
18.
The async pipe automatically unsubscribes from the observable when the
component is destroyed.
Answer:
True
19.
The NgSwitch directive is a structural directive in Angular.
Answer:
True
20.
The NgClass directive is used to add or remove CSS classes from an element
based on a condition.
Answer:
True
---------------------------------------------------------------------------------------------
1.
The ____________ module provides the routing functionality in Angular.
Answer:
RouterModule
2.
The ____________ method is used to define the routes for an Angular
application.
Answer:
forRoot
3.
The ____________ property of a route is used to specify the component that
should be displayed when the route is navigated to.
Answer:
component
4.
The ____________ property of a route is used to specify the path that should be
used to navigate to the component.
Answer:
path
5.
The ____________ method is used to navigate to a specific route in an Angular
application.
Answer:
navigate
6.
The ____________ method is used to subscribe to changes in the current route in
an Angular application.
Answer:
paramMap
7.
The ____________ method is used to get the query parameters from the current
route in an Angular application.
Answer:
queryParamMap
8.
The ____________ service is used to make HTTP requests in an Angular
application.
Answer:
HttpClient
9.
The ____________ method of the HttpClient service is used to make a GET request
to a URL.
Answer:
get
10.
The ____________ method of the HttpClient service is used to make a POST request
to a URL.
Answer:
post
11.
The ____________ method of the HttpClient service is used to make a PUT request
to a URL.
Answer:
put
12.
The ____________ method of the HttpClient service is used to make a DELETE
request to a URL.
Answer:
delete
13.
The ____________ service is used to share data between components in an Angular
application.
Answer:
DataService
14.
The ____________ method of the DataService service is used to set the data that
should be shared between components.
Answer:
setData
15.
The ____________ method of the DataService service is used to get the data that
was set in another component.
Answer:
getData
16.
The ____________ service is used to show a message to the user in an Angular
application.
Answer:
ToastrService
17.
The ____________ method of the ToastrService service is used to show a success
message to the user.
Answer:
success
18.
The ____________ method of the ToastrService service is used to show an error
message to the user.
Answer:
error
19.
The ____________ method of the ToastrService service is used to show a warning
message to the user.
Answer:
warning
20.
The ____________ method of the ToastrService service is used to show an info
message to the user.
Answer:
info
---------------------------------------------------------------------------------------------
1.
True or False: Angular forms allow you to track and manage user input.
Answer: True
2.
True or False: Angular forms require the FormsModule to be imported in every
component that uses forms.
Answer: True
3.
True or False: Angular Reactive Forms provide a more scalable and flexible
approach compared to Template-driven Forms.
Answer: True
4.
True or False: In Angular forms, both Template-driven Forms and Reactive Forms
can be used together in a single component.
Answer: False
5.
True or False: Angular forms can handle validation on both the client-side and
the server-side.
Answer: True
6.
True or False: Angular forms can perform asynchronous validation using custom
validators.
Answer: True
7.
True or False: Angular forms provide built-in support for cross-field
validation.
Answer: True
8.
True or False: Angular forms support two-way data binding, allowing data
synchronization between the form and the model.
Answer: True
9.
True or False: Angular forms allow you to dynamically add or remove form
controls during runtime.
Answer: True
10.
True or False: Angular forms can display validation error messages to the user.
Answer: True
11.
True or False: Angular forms support conditional validation based on user
input.
Answer: True
12.
True or False: Angular forms can handle form submission and perform actions
based on the submitted data.
Answer: True
13.
True or False: Angular forms can be nested, allowing you to create complex form
structures.
Answer: True
14.
True or False: Angular forms automatically handle form submission and data
submission to the server.
Answer: False
15.
True or False: Angular forms allow you to customize the styling and appearance
of form elements.
Answer: True
16.
True or False: Angular forms provide built-in support for handling file
uploads.
Answer: True
17.
True or False: Angular forms can be used for both reactive and proactive form
handling.
Answer: False
18.
True or False: Angular forms can handle input sanitization and prevent
cross-site scripting (XSS) attacks.
Answer: True
19.
True or False: Angular forms automatically handle form reset and clearing user
input.
Answer: False
20.
True or False: Angular forms can be used to build multi-step and wizard-like
form experiences.
Answer: True
