Cognizant Angular Developer Interview Questions, Process, and Tips

Components can communicate using @Input and @Output decorators, services, and event emitters.

• Use @Input decorator to pass data from parent to child component

• Use @Output decorator and EventEmitter to emit events from child to parent component

• Use services to share data between components

Implementing a login page involves creating a form for users to input their credentials and validating them against a database.

• Create a login form with fields for username and password

• Use Angular's form validation to ensure required fields are filled out

• Send the user's credentials to a backend server for authentication

• Upon successful authentication, redirect the user to the main application page

Using services or @Input/@Output decorators to share data between components

• Use services to create a shared data service that can be injected into multiple components

• Use @Input decorator to pass data from parent to child component

• Use @Output decorator with EventEmitter to emit events and pass data from child to parent component

Http request in Angular is used to fetch data from a server or API.

• Use HttpClient module to make HTTP requests in Angular

• Subscribe to the Observable returned by the HTTP request to get the data

• Handle errors using catchError operator

• Set headers, query parameters, and request body as needed