Top 200 Angular Interview Questions and Answers
Updated 25 Jan 2025
Q1. What Data binding in angular?
Data binding in Angular is a way to establish a connection between the UI and the application's data.
Data binding allows automatic synchronization of data between the model and the view.
It eliminates the need for manual DOM manipulation.
There are different types of data binding in Angular, such as interpolation, property binding, event binding, and two-way binding.
Interpolation: {{ data }}
Property binding: [property]='data'
Event binding: (event)='handler()'
Two-way binding: [(...read more
Components are building blocks of Angular applications, while directives are used to add behavior to DOM elements.
Components have a template, styles, and behavior encapsulated together, while directives are used to manipulate the behavior of existing DOM elements.
Components are typically used to create reusable UI elements, while directives are used to add custom behavior to existing elements.
Components can have their own view encapsulation, while directives do not have their...read more
Q3. What are different data bindings in angular
Angular has four types of data bindings: Interpolation, Property binding, Event binding, and Two-way binding.
Interpolation: {{ expression }}
Property binding: [property]="expression"
Event binding: (event)="expression"
Two-way binding: [(ngModel)]="expression"
Q4. Whats difference between angular and react
Angular is a complete framework while React is a library for building UI components.
Angular is a complete framework with built-in features like routing, forms, and animations.
React is a library for building UI components and requires additional libraries for features like routing and forms.
Angular uses two-way data binding while React uses one-way data flow.
Angular has a steeper learning curve while React is easier to learn.
Angular is maintained by Google while React is maint...read more
Q5. What are @Input() and @Output()?
The @Input() and @Output() are decorators in Angular used for communication between parent and child components.
The @Input() decorator is used to pass data from a parent component to a child component.
The @Output() decorator is used to emit events from a child component to a parent component.
The @Input() property is bound to a value in the parent component template using property binding.
The @Output() property is bound to an event in the child component template using event b...read more
Q6. What is NgViewInit()
NgViewInit() is a lifecycle hook method in Angular that is called after the component's view has been fully initialized.
NgViewInit() is used to perform tasks that require the view to be fully initialized, such as initializing data-bound properties or setting up event listeners.
It is commonly used to fetch data from a backend API and update the view accordingly.
Example: ngOnInit() { this.http.get('api/data').subscribe(data => { this.data = data; }); }
Q7. What is html, what is angular
HTML is a markup language used for creating web pages. Angular is a JavaScript framework for building dynamic web applications.
HTML stands for HyperText Markup Language
HTML is used to create the structure of a web page
Angular is a JavaScript framework developed by Google
Angular allows for the creation of dynamic web applications
Angular uses components and directives to build interactive user interfaces
Q8. What is angular js and angular
AngularJS and Angular are JavaScript frameworks used for building web applications.
AngularJS is an older version of Angular, released in 2010.
Angular is a complete rewrite of AngularJS, released in 2016.
Angular uses TypeScript, a superset of JavaScript, while AngularJS uses plain JavaScript.
Both frameworks use a component-based architecture and have a strong focus on dependency injection.
Angular has a more streamlined and efficient performance compared to AngularJS.
Angular Jobs
Q9. difference between pure and impure pipes in angular
Pure pipes are stateless and only depend on input values, while impure pipes can have side effects and depend on external factors.
Pure pipes are faster and more efficient than impure pipes.
Pure pipes are used for simple transformations of data, while impure pipes are used for more complex transformations.
Pure pipes can be memoized for better performance.
Impure pipes can cause performance issues if not used carefully.
Examples of pure pipes include currency and date formatting,...read more
Q10. How will you separate your business logic, presentation logic, and service logic in angular?
Business logic, presentation logic, and service logic can be separated using Angular's component architecture.
Create separate components for each logic layer
Use services to handle business logic
Use pipes for presentation logic
Keep components simple and focused on one task
Use dependency injection to share services between components
Q11. How do you call REST APIs in angular?
To call REST APIs in Angular, use the HttpClient module and its methods like get(), post(), put(), delete().
Import the HttpClientModule in your Angular module
Inject the HttpClient service in your component or service
Use the HttpClient methods to make HTTP requests to the REST APIs
Handle the response using observables and subscribe to them
Example: httpClient.get('https://api.example.com/data')
Example: httpClient.post('https://api.example.com/data', postData)
Q12. What is the difference between Pure pipe and impure pipe?
Pure pipes are stateless and only depend on input data, while impure pipes have internal state and can have side effects.
Pure pipes are faster and more efficient than impure pipes.
Pure pipes are used for simple transformations of data, while impure pipes are used for more complex transformations.
Examples of pure pipes include currency and date formatting, while examples of impure pipes include filtering and sorting.
To mark a pipe as pure, add the @Pipe({pure: true}) decorator...read more
Q13. what is Angular Interceptor?
Angular Interceptor is a middleware that intercepts HTTP requests and responses.
It can be used to add headers, modify requests, handle errors, and more.
Interceptors can be global or specific to a certain request.
Example use cases include adding authentication tokens to requests or logging responses.
Interceptors are implemented using the HttpInterceptor interface in Angular.
Q14. What is a component in Angular?
A component is a building block of an Angular application that represents a part of the UI.
Components are reusable and self-contained
They have a template that defines the view
They have a class that defines the behavior
They can communicate with other components using @Input and @Output decorators
Q15. How to set up the environment for building angular application
To set up the environment for building an Angular application, you need to install Node.js and Angular CLI.
Install Node.js and npm
Install Angular CLI using npm
Create a new Angular project using CLI
Run the project using ng serve command
Q16. Tell about Angular pipe
Angular pipe is a feature that allows transforming data before displaying it in the view.
Pipes are used to format, filter, and transform data.
They can be used in interpolation, property binding, and directive binding.
Built-in pipes include DatePipe, UpperCasePipe, and CurrencyPipe.
Custom pipes can be created using the @Pipe decorator.
Q17. How to communicate with components in angular?
Components in Angular can communicate with each other using @Input, @Output, and services.
Use @Input to pass data from parent to child component
Use @Output to emit events from child to parent component
Use services to share data between components that are not directly related
Use RxJS subjects to create a shared data stream between components
Q18. How to create and use custom directive
Custom directives in AngularJS allow you to create reusable components.
Create a new directive using the directive() method
Specify the directive's behavior using the link() method
Use the directive in HTML using its name as an attribute
Pass data to the directive using attributes
Example:
Q19. What is Decorators and Directives
Decorators and directives are features in programming languages that allow for the modification or extension of code behavior.
Decorators are used in languages like Python to modify the behavior of functions or classes.
Directives are used in AngularJS to add behavior to HTML elements.
Decorators in Python are denoted by the @ symbol, like @staticmethod.
Directives in AngularJS are denoted by attributes in HTML tags, like ng-model.
Q20. Tell about Angular Routes
Angular Routes are used to navigate between different components and views in an Angular application.
Routes are defined in the app-routing.module.ts file
Each route maps a URL path to a component
Routes can have parameters and child routes
Navigation between routes can be done using routerLink directive or programmatically using Router service
Q21. Describe Angular life cycle
Angular life cycle is a series of events that occur from the creation of a component to its destruction.
ngOnChanges - called when an input property changes
ngOnInit - called once after the first ngOnChanges
ngDoCheck - called during every change detection cycle
ngAfterContentInit - called after content is projected into component
ngAfterContentChecked - called after every check of projected content
ngAfterViewInit - called after component's view has been initialized
ngAfterViewChec...read more
Q22. How angular works , architecture
Angular is a JavaScript framework for building web applications with a modular architecture.
Angular uses a component-based architecture to build reusable UI components
It uses a declarative approach to define UI elements and their behavior
Angular provides a powerful set of tools for data binding, dependency injection, and routing
It follows the MVC (Model-View-Controller) pattern to separate concerns and improve maintainability
Angular also supports server-side rendering for bet...read more
Q23. explain about life cycle hooks
Life cycle hooks are methods that allow you to tap into the lifecycle of a component in Angular.
Life cycle hooks are predefined methods that get called at specific stages of a component's life cycle.
They provide a way to perform actions before, during, or after certain events in a component's life cycle.
Some commonly used life cycle hooks in Angular are ngOnInit, ngOnChanges, ngAfterViewInit, ngOnDestroy, etc.
ngOnInit is called after the component has been initialized and its...read more
Q24. difference between template driven and reactive form
Template driven forms are based on directives while reactive forms are based on reactive programming.
Template driven forms are easier to use and require less code.
Reactive forms are more flexible and allow for more complex validation.
Template driven forms are suitable for simple forms while reactive forms are better for complex forms.
Template driven forms use two-way data binding while reactive forms use observable streams.
Template driven forms are synchronous while reactive ...read more
Q25. What are the building blocks in Angular?
Building blocks in Angular are components, directives, services, and modules.
Components are the basic building blocks of Angular applications.
Directives add behavior to an existing DOM element or component.
Services are used to share data or logic across components.
Modules are used to organize the application into cohesive blocks of functionality.
Q26. What are the various lifecycle hooks in Angular?
Angular lifecycle hooks are methods that allow you to tap into specific points in a component's lifecycle.
ngOnChanges: Called when an input property changes
ngOnInit: Called once the component is initialized
ngDoCheck: Called during every change detection run
ngAfterContentInit: Called after content (ng-content) has been projected into the component
ngAfterContentChecked: Called after every check of the projected content
ngAfterViewInit: Called after the component's view has been ...read more
Q27. Tell about Angular Directives
Angular directives are markers on a DOM element that tell AngularJS to attach a specified behavior to that DOM element.
Directives are used to create custom HTML tags that serve as new, reusable widgets.
They can be used to manipulate the DOM, add event listeners, and create reusable components.
Some built-in directives include ng-model, ng-repeat, and ng-show.
Directives can be restricted to only apply to certain types of elements, such as attributes or elements.
They can also be...read more
Q28. What is ng-content
ng-content is a directive in Angular that allows for dynamic insertion of content.
It is used to project content into a component from the outside.
It is often used in combination with ng-template and ng-container.
It can be used to create reusable components that can be customized with different content.
It is useful for creating layouts and templates that can be reused across multiple components.
Q29. What is ngFor is used for?
ngFor is a directive in Angular used for iterating over a collection of data and rendering it in the UI.
ngFor is used in Angular templates to display a list of items by iterating over an array or object.
It is commonly used with an *ngFor directive in HTML templates.
Example:
{{item}}
Q30. How to load a component only after 3 of my services are loaded?
Use Angular's 'resolve' property to load component after services are loaded.
Create a resolver service that waits for all three services to complete before resolving.
Add the resolver service to the 'resolve' property of the component's route.
Access the resolved data in the component using the ActivatedRoute service.
Example: { path: 'my-component', component: MyComponent, resolve: { data: MyResolverService } }
Q31. Difference between angular and node js
Angular is a front-end framework for building client-side applications, while Node.js is a back-end runtime environment for running server-side applications.
Angular is used for building dynamic web applications with HTML, CSS, and TypeScript.
Node.js is used for server-side scripting and building scalable network applications.
Angular is a front-end framework developed and maintained by Google.
Node.js is a back-end runtime environment that uses JavaScript on the server side.
Ang...read more
Q32. What is an angular and how you difference between angular react js
Angular is a front-end framework developed by Google, while React is a JavaScript library for building user interfaces.
Angular is a full-fledged front-end framework with its own ecosystem, while React is a JavaScript library focused on building UI components.
Angular uses TypeScript, while React uses JavaScript.
Angular has a two-way data binding feature, while React uses a one-way data flow.
Angular has a steep learning curve due to its complexity, while React is easier to lear...read more
Q33. how to implement security in angular
Implement security in Angular by using built-in features like Angular Router Guards, HTTP Interceptors, and secure coding practices.
Use Angular Router Guards to control access to routes based on user authentication and authorization.
Implement HTTP Interceptors to intercept and modify HTTP requests and responses for adding security headers or handling authentication tokens.
Follow secure coding practices like input validation, output encoding, and avoiding client-side data mani...read more
Q34. what know about angular. what is typescript.
Angular is a JavaScript framework for building web applications. TypeScript is a superset of JavaScript that adds static typing.
Angular is a popular frontend framework developed by Google.
It uses TypeScript as its primary language.
TypeScript is a superset of JavaScript that adds optional static typing and other features.
It helps catch errors at compile time and improves code maintainability.
TypeScript code is compiled into JavaScript code that can run in any browser.
Angular u...read more
Q35. How to optimize an Angular Project?
Optimizing an Angular project involves reducing bundle size, lazy loading modules, using AOT compilation, and optimizing performance.
Reduce bundle size by removing unused code and dependencies
Lazy load modules to only load components when needed
Use Ahead-of-Time (AOT) compilation for faster rendering
Optimize performance by minimizing DOM manipulation and using trackBy in ngFor loops
Q36. What design pattern used in angular
The design pattern commonly used in Angular is the Observer pattern.
The Observer pattern is used to establish a one-to-many dependency between objects.
In Angular, Observables are used to implement the Observer pattern for handling asynchronous data streams.
Components in Angular often use Observables to subscribe to changes and react accordingly.
Q37. What is the angular and its advantages?
Angular is a popular front-end framework for building dynamic web applications.
Angular is developed and maintained by Google.
It uses TypeScript for building web applications.
Advantages include two-way data binding, dependency injection, and modular architecture.
Angular provides a rich set of built-in directives and components for faster development.
It has a large community and ecosystem for support and resources.
Q38. How to Define a module in angular?
A module in Angular is defined using the NgModule decorator.
Import the NgModule decorator from @angular/core
Use the decorator to define the module and its properties
Export the module to make it available for other modules to import
Q39. what is angular and its feature
Angular is a JavaScript framework for building web applications.
Uses TypeScript for building scalable and maintainable applications
Provides two-way data binding for easy synchronization between model and view
Offers a powerful set of built-in directives and services for faster development
Supports modular architecture and dependency injection for better code organization
Enables easy integration with other libraries and frameworks
Example: Angular is used by Google, Microsoft, an...read more
Q40. Comparison between react js and angular
React JS is a lightweight library for building user interfaces, while Angular is a full-fledged framework with more features.
React is more flexible and allows for easier integration with other libraries and frameworks.
Angular provides more out-of-the-box features like routing, forms, and HTTP client.
React uses a virtual DOM for better performance, while Angular uses two-way data binding for easier data manipulation.
React is maintained by Facebook, while Angular is maintained ...read more
Q41. how to create service in angular
To create a service in Angular, you can use the 'ng generate service' command or manually create a service file.
Use the Angular CLI command 'ng generate service serviceName' to create a new service file
Manually create a service file by creating a new TypeScript file with the '.service.ts' extension
Inject the service into components or other services by adding it to the providers array in the @Injectable decorator
Define methods and properties in the service class to provide fu...read more
Q42. What is routing in MVC and Angular
Routing in MVC and Angular is the mechanism of mapping URLs to controller actions or components.
In MVC, routing is used to define the URL patterns and map them to specific controller actions.
In Angular, routing is used to navigate between different components based on the URL.
Routing in MVC is typically configured in the RouteConfig class, while in Angular it is configured in the RouterModule.
Example in MVC: routes.MapRoute('Default', '{controller}/{action}/{id}', new { contr...read more
Q43. How to call api in angular write the code for this
To call an API in Angular, use HttpClient module to make HTTP requests.
Import HttpClientModule in app.module.ts
Inject HttpClient in the component/service where API call needs to be made
Use HttpClient methods like get(), post(), put(), delete() to make API calls
Subscribe to the Observable returned by HttpClient methods to handle the response
Q44. What is life cycle hook
Life cycle hooks are functions that allow you to tap into the lifecycle of Angular components.
Life cycle hooks are predefined methods that get called at specific points in the component's life cycle.
They allow you to perform actions like initialization, change detection, and destruction.
Examples of life cycle hooks include ngOnInit, ngOnChanges, and ngOnDestroy.
Q45. How would the application work without @NgModule
The application would not work properly without @NgModule as it is required to bootstrap the application and configure dependencies.
Without @NgModule, the application would not be able to bootstrap and start properly.
NgModule is used to configure dependencies, such as components, directives, and services.
NgModule also helps in organizing the application into modules for better maintainability and reusability.
Q46. How to enable SSR in Angular
Server-side rendering (SSR) in Angular can be enabled by using Angular Universal.
Install Angular Universal using Angular CLI
Create a new Angular Universal project
Update app.module.ts to include server-side rendering
Build and run the Angular Universal project
Q47. What is a module in Angular?
A module is a container for a group of related components, directives, pipes, and services.
Modules help organize an application into cohesive blocks of functionality.
They can be imported and exported to share functionality between modules.
Angular has a built-in module called the AppModule, which is the root module of an Angular application.
Modules can be lazy loaded to improve performance.
Modules can have their own providers to provide services specific to that module.
Q48. what is angular? what is SPA?
Angular is a popular front-end framework for building web applications. SPA stands for Single Page Application.
Angular is a front-end framework developed by Google for building dynamic web applications.
It uses TypeScript for building applications with components, services, and modules.
SPA is a web application that loads a single HTML page and dynamically updates the content as the user interacts with the app.
SPA provides a more seamless user experience by avoiding full page r...read more
Q49. When to use interceptor in angular?
Interceptors are used to intercept HTTP requests and responses.
To add headers, modify requests, or handle errors globally
Can be used for authentication, logging, caching, etc.
Example: Adding an authorization token to every request
Q50. What are new features in latest angular version?
Some new features in the latest Angular version include Ivy rendering engine, Bazel support, and differential loading.
Ivy rendering engine for improved performance and smaller bundle sizes
Bazel support for faster builds and better dependency management
Differential loading for serving different bundles to modern and legacy browsers
Q51. What are route guards?
Route guards are used in Angular to prevent unauthorized access to certain routes.
Route guards can be used to check if a user is authenticated before allowing access to a route.
There are three types of route guards: CanActivate, CanActivateChild, and CanLoad.
CanActivate is used to protect individual routes, while CanActivateChild is used to protect child routes.
CanLoad is used to prevent lazy-loaded modules from being loaded until certain conditions are met.
Q52. What is the use of ActivatedRoute?
ActivatedRoute is used to access the current route's information.
It provides access to route parameters, query parameters, and fragment parameters.
It can be used to subscribe to route parameter changes.
It can be injected into a component or service.
Example: accessing a route parameter in a component using snapshot: this.route.snapshot.params['id']
Example: subscribing to route parameter changes in a component: this.route.params.subscribe(params => console.log(params))
Q53. What is NGRX ?
NGRX is a state management library for Angular applications, inspired by Redux.
NGRX helps manage the state of an Angular application in a predictable way
It uses a unidirectional data flow and immutable state
NGRX consists of actions, reducers, selectors, and effects
Example: Actions define events that occur in the application, Reducers specify how the state changes in response to actions
Q54. Different between vue and angular
Vue is lightweight and easy to learn, while Angular is more powerful and feature-rich.
Vue is easier to set up and has a smaller learning curve
Angular has more built-in features and is better for larger projects
Vue uses a template-based syntax, while Angular uses a component-based syntax
Vue has better performance in smaller applications
Angular has better performance in larger applications
Q55. What are the latest updates in angular
Angular 12 is the latest version with updates on Ivy, performance improvements, and new features.
Angular 12 is the latest version released in May 2021
Updates include improvements to Ivy compiler, performance enhancements, and new features like strict mode
Angular Material received updates with new components and features
Improved support for Webpack 5 and TypeScript 4.2
Q56. How to reduce bundle size of angular application
To reduce bundle size of an Angular application, you can use lazy loading, tree shaking, code splitting, and optimizing assets.
Use lazy loading to load modules only when needed
Implement tree shaking to remove unused code
Utilize code splitting to divide code into smaller chunks
Optimize assets by compressing images and minifying CSS/JS files
Q57. Explain angular performance improvements
Angular performance improvements involve optimizing code, reducing load times, and minimizing rendering cycles.
Use lazy loading to only load components when needed
Optimize change detection by using OnPush strategy
Minimize DOM manipulation by using ngZone
Implement server-side rendering for faster initial page load
Use AOT (Ahead-of-Time) compilation to reduce bundle size
Q58. Please explain the custom hooks in angular
Custom hooks in Angular are functions that allow you to reuse logic across multiple components.
Custom hooks are created using the @Injectable decorator
They can be used to share stateful logic between components
They can also be used to abstract away complex logic from components
Custom hooks can be tested independently of components
Q59. What is ng-container
ng-container is a structural directive in Angular used to group elements without creating an extra element in the DOM.
ng-container is used to group elements together without adding an extra element to the DOM
It is often used with structural directives like *ngIf and *ngFor to apply logic to multiple elements
ng-container is not rendered in the final DOM, making it useful for organizing code without affecting the layout
Q60. Difference between reactive form and template driven form
Reactive forms are more flexible and allow for complex form validation and handling, while template driven forms are simpler and rely on directives in the template.
Reactive forms are defined programmatically in the component class using form controls, form groups, and form arrays.
Template driven forms are defined in the HTML template using ngModel directive and template variables.
Reactive forms offer more control over form validation and submission logic.
Template driven forms...read more
Q61. How would you create a drop-down in angular. Write a code for this.
Creating a drop-down in Angular
Use the
Q62. What is angular , why SPA came in picture
Angular is a JavaScript framework for building web applications. SPA came in picture for better user experience.
Angular is a client-side framework developed by Google.
It allows developers to build dynamic, single-page web applications.
SPA (Single Page Application) came in picture to provide a better user experience by reducing page reloads and improving performance.
SPA loads all the necessary resources (HTML, CSS, JS) at once and dynamically updates the content as the user in...read more
Q63. How to apply ngclass
ngClass is used to conditionally apply CSS classes to an element in Angular.
Use ngClass directive in the template with an object or array of classes and conditions
Classes are applied when the condition is true, and removed when false
Example:
Q64. how to load a angular application
To load an Angular application, you can use the Angular CLI command 'ng serve' to start a development server.
Use the Angular CLI command 'ng serve' to start a development server
Navigate to the project directory in the terminal and run 'ng serve'
Open a web browser and go to 'http://localhost:4200/' to view the application
Q65. What are Routing Guards?
Routing guards are used in Angular to control access to certain routes based on certain conditions.
Routing guards are used to protect routes in Angular applications.
They can be used to control access based on authentication status, user roles, etc.
There are different types of routing guards like CanActivate, CanActivateChild, CanDeactivate, CanLoad.
Example: CanActivate guard can be used to check if a user is authenticated before allowing access to a route.
Q66. What is Ngrx Store?
Ngrx Store is a state management library for Angular applications.
Centralized state management for Angular applications
Uses RxJS for reactive programming
Helps manage application state in a predictable way
Facilitates communication between components
Q67. How to call service in angular
To call a service in Angular, you need to inject the service into a component or another service and then call its methods.
Inject the service into the component or service constructor
Call the service method using the injected instance
Q68. Component, module and service difference
Components, modules, and services are different parts of a software system with specific functionalities.
Components are reusable and independent parts of a system, often encapsulating a specific functionality.
Modules are larger units of code that group related components together.
Services are self-contained units of functionality that can be accessed remotely over a network.
Examples: Component - Button in a UI, Module - User Authentication module, Service - REST API for data ...read more
Q69. Translation in Angular How we wil do ? CSS
Translation in Angular can be done using ng-translate or ngx-translate libraries. CSS can be applied using Angular's built-in styles or external stylesheets.
Use ng-translate or ngx-translate libraries for translation in Angular
Apply CSS using Angular's built-in styles or external stylesheets
Utilize Angular's ngClass directive for dynamic CSS classes
Q70. Fundamentals of JS and Angular.
JS is a scripting language used for web development. Angular is a JS framework for building web applications.
JS is used for adding interactivity to web pages
JS has data types like string, number, boolean, etc.
Angular is a framework for building single-page applications
Angular uses components, services, and directives for building applications
Angular has features like dependency injection, routing, and forms
Q71. Router in Angular?
Router in Angular is used for navigation between different components and views.
Angular Router is a powerful tool for building single-page applications
It allows you to define routes, which are URL patterns that map to specific components
You can use routerLink directive to navigate between different views
You can also use router.navigate method to programmatically navigate to a specific route
Q72. Observables Input Output ForJoin MergeMap Interceptors
Observables are used in RxJS to handle asynchronous operations, input/output refers to data flow, ForJoin and MergeMap are operators, interceptors are used for handling HTTP requests.
Observables are used for handling asynchronous operations in RxJS
Input/Output refers to the flow of data into and out of a system
ForJoin is used to combine multiple observables into a single observable
MergeMap is an operator used to merge observables and map their values
Interceptors are used in A...read more
Q73. Singals in angular
Signals in Angular are used to communicate between components or services.
Signals in Angular are typically implemented using Observables or Subjects.
They allow components to subscribe to changes and react accordingly.
Signals can be used to pass data, trigger actions, or handle events.
Example: Using a Subject to emit a signal when a button is clicked.
Q74. Deployment of angular application
Deployment of Angular application involves building the application and hosting it on a server.
Build the Angular application using 'ng build' command
Copy the generated files from the 'dist' folder to the server
Configure the server to serve the Angular application
Use tools like Jenkins or GitLab CI/CD for automated deployment
Q75. Deep dive in net core and angular
Deep dive into .NET Core and Angular
NET Core is a cross-platform, open-source framework for building modern, cloud-based, internet-connected applications.
Angular is a popular front-end framework for building dynamic web applications.
Understanding the architecture, features, and best practices of both .NET Core and Angular is essential for developing robust and scalable applications.
Integration of .NET Core backend with Angular frontend for creating full-stack applications.
Uti...read more
Q76. How does angular works, data sharing
Angular uses services, observables, and components for data sharing.
Angular services can be used to share data between components.
Observables can be used for asynchronous data sharing.
Components can communicate with each other using @Input and @Output decorators.
Shared modules can also be used for sharing data across multiple components.
Q77. Angular Lazy loading and how do you implement
Lazy loading in Angular is a technique used to load modules only when they are needed.
Lazy loading is achieved by using the loadChildren property in the route configuration.
Lazy loaded modules are loaded asynchronously when the user navigates to the corresponding route.
Lazy loading helps improve the initial loading time of the application by only loading necessary modules on demand.
Q78. how you integrated your angular code with in the project which is related to asp.net core
I integrated Angular code with ASP.NET Core using Angular CLI to generate components and services, and then integrating them into ASP.NET Core project.
Used Angular CLI to generate components and services
Integrated Angular code into ASP.NET Core project by adding necessary configurations and dependencies
Utilized Angular HTTP client to communicate with ASP.NET Core backend APIs
Q79. Workflow of technical aspects in Node, Angular.
Node.js and Angular work together to create a seamless workflow for backend development.
Node.js is used for server-side scripting and handling backend logic.
Angular is used for client-side scripting and creating dynamic web applications.
Node.js can serve as the backend API for an Angular frontend application.
Communication between Node.js backend and Angular frontend can be done through RESTful APIs.
Q80. Template Forms vs Reactive Forms
Template forms are static while reactive forms are dynamic.
Template forms are easier to create and maintain.
Reactive forms allow for more complex validation and dynamic behavior.
Template forms are suitable for simple forms with few fields.
Reactive forms are suitable for complex forms with many fields and dependencies.
Reactive forms use observable streams to manage form data.
Template forms use two-way data binding to manage form data.
Q81. reactive vs template driven form
Template driven forms are easier to create and maintain, while reactive forms offer more flexibility and control.
Template driven forms are created using directives in the template, while reactive forms are created programmatically in the component class.
Reactive forms offer more control over validation and dynamic form changes.
Template driven forms are suitable for simple forms with less complex logic, while reactive forms are better for complex forms with dynamic requirement...read more
Q82. Different Structural directives used
Structural directives are used to manipulate the structure of the DOM.
ngIf - conditionally adds or removes an element from the DOM
ngFor - repeats an element for each item in a list
ngSwitch - conditionally adds or removes elements based on a value
ngStyle - dynamically adds styles to an element
ngClass - dynamically adds classes to an element
Q83. using ngOnchages
ngOnChanges is a lifecycle hook in Angular that is called when input properties of a component change.
ngOnChanges is used to respond to changes in input properties of a component
It receives a SimpleChanges object as an argument, which contains the previous and current values of the input properties
ngOnChanges is commonly used for detecting changes in @Input properties and performing actions based on those changes
Q84. constructor vs ngOnInit
Constructor is a method used to create and initialize an object, while ngOnInit is a lifecycle hook used in Angular to initialize components.
Constructor is a default method of a class that is automatically called when an object is created.
ngOnInit is a lifecycle hook in Angular that is called after the constructor and is used to initialize data in a component.
Constructors are used in all classes, while ngOnInit is specific to Angular components.
Q85. Lifecycles in Angular
Angular lifecycles are methods that are called at specific points during the life of a component or directive.
Angular components have lifecycle hooks that allow you to tap into key moments in the component's lifecycle, such as creation, updates, and destruction.
Some of the commonly used lifecycle hooks include ngOnInit, ngOnChanges, ngDoCheck, ngOnDestroy, etc.
These lifecycle hooks can be used to perform tasks like initializing data, detecting changes, cleaning up resources, ...read more
Q86. How to handle performance issues in angular
Performance issues in Angular can be handled by optimizing code, reducing HTTP requests, and using lazy loading.
Optimize code by using trackBy in ngFor loops
Reduce HTTP requests by using caching and pagination
Use lazy loading to load only necessary components
Use AOT compilation to reduce load time
Avoid using ngIf with heavy computations
Use ChangeDetectionStrategy.OnPush to reduce change detection cycles
Angular Bootstrap is a front-end framework that combines Angular and Bootstrap to create responsive web applications.
Angular Bootstrap is a library that allows developers to easily integrate Bootstrap components into Angular applications.
It provides pre-built UI components like modals, dropdowns, and tooltips that can be easily customized and used in Angular projects.
Angular Bootstrap simplifies the process of creating responsive web designs by leveraging the power of both An...read more
Q88. What are basic building blocks of Angular
The basic building blocks of Angular are components, templates, directives, services, and dependency injection.
Components are the building blocks of Angular applications
Templates define how components are rendered
Directives add behavior to elements in the DOM
Services provide functionality that can be shared across components
Dependency injection is used to provide services to components
Q89. Why Angular, difference between angular ans react
Angular is a full-fledged framework while React is a library. Angular uses TypeScript while React uses JavaScript.
Angular is a complete framework with a lot of built-in features while React is a library that only handles the view layer.
Angular uses TypeScript, which is a superset of JavaScript, while React uses plain JavaScript.
Angular has a steeper learning curve but provides more structure and organization while React is easier to learn and more flexible.
Angular has a large...read more
Q90. Difference between in constructor and NgOninit()?
Constructor is used to initialize class properties, NgOnInit() is a lifecycle hook used to perform initialization after Angular has initialized the component.
Constructor is a TypeScript feature used to create and initialize class properties.
NgOnInit() is an Angular lifecycle hook that is called after Angular has initialized the component.
Constructor is called before NgOnInit() during component initialization.
Example: Constructor is used to inject services, NgOnInit() is used ...read more
Q91. what is pure pipe and impure pipe?
Pure pipe and impure pipe are concepts in Angular framework for data transformation.
Pure pipe is a pipe that is stateless and doesn't modify the input data.
Impure pipe is a pipe that can have side effects and modify the input data.
Pure pipes are more efficient as they are only executed when the input data changes.
Impure pipes are executed on every change detection cycle, even if the input data remains the same.
Pure pipes are denoted by the 'pure' keyword in Angular.
Impure pip...read more
Q92. Difference between angular vs Angular js
Angular is a complete rewrite of AngularJS with improved performance and features.
Angular is a TypeScript-based framework while AngularJS is based on JavaScript.
Angular has a component-based architecture while AngularJS uses a directive-based architecture.
Angular has better performance and improved features like server-side rendering and lazy loading.
AngularJS is no longer supported by Google and has been replaced by Angular.
Q93. Explain about ngmodel
ngModel is a directive in AngularJS that binds the value of HTML controls to application data.
ngModel is used for two-way data binding in AngularJS.
It can be used with input, select, textarea, and custom form controls.
Example:
Q94. how to get value from ng-getValue=""
ng-getValue is not a standard attribute in Angular. It may be a custom directive or a typo.
Check if ng-getValue is a custom directive or attribute in your Angular application
Verify if it is being used correctly in the HTML template
If it is a typo, correct it to the appropriate attribute or directive
Q95. Difference between pure and impure pipes
Pure pipes do not have any side effects and always return the same output for the same input, while impure pipes can have side effects and may not return the same output for the same input.
Pure pipes are stateless and deterministic.
Impure pipes can have side effects like modifying global variables or making network requests.
Examples of pure pipes include filters in Angular, while examples of impure pipes include async pipes in Angular.
Q96. Tell about Angular Components
Angular Components are the building blocks of Angular applications.
Components are reusable and self-contained
They have a template, styles, and logic
They can communicate with other components using @Input and @Output decorators
Examples include navbar, sidebar, login form, etc.
Q97. How would you share data between two unrelated angular components
Using a shared service to communicate data between unrelated components in Angular.
Create a shared service with a BehaviorSubject to store and emit data
Inject the shared service into both components that need to share data
Subscribe to the BehaviorSubject in each component to receive updates
Q98. What is a pipe in angular and its types
A pipe in Angular is used to transform data before displaying it in the template.
Pipes are used in templates to format data before displaying it to the user
There are built-in pipes like DatePipe, UpperCasePipe, LowerCasePipe, etc.
Custom pipes can also be created by implementing the PipeTransform interface
Pipes can be chained together to perform multiple transformations on the data
Q99. Communication between components in Angular
Angular uses various techniques for communication between components.
Input and Output decorators for parent-child communication
EventEmitter for custom events
Services for sharing data between unrelated components
RxJS for reactive programming and observables
ViewChild and ContentChild for accessing child components
Q100. When to use Inline Template vs External Template in Angular?
Inline templates are used for small, simple templates, while external templates are used for larger, complex templates.
Inline templates are defined within the component's TypeScript file using the template property.
External templates are defined in separate HTML files and linked to the component using the templateUrl property.
Inline templates are useful for small components or when the template is simple and doesn't require much HTML code.
External templates are beneficial for...read more
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