Emids Technologies Limited Technical Lead Interview Questions and Answers

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.

Interceptors are used in software development to intercept and manipulate HTTP requests and responses.

• Interceptors can be used for logging, authentication, error handling, and modifying requests/responses.

• In Angular, interceptors can be used to add headers to HTTP requests, handle errors globally, and cache responses.

• In Spring Boot, interceptors can be used to log requests, validate input, and handle exceptions.

• Interce...read more

Authentication and authorization in Angular can be implemented using Angular's built-in features and third-party libraries.

• Use Angular's HttpClient to send authentication requests to a server

• Implement guards to restrict access to certain routes based on user roles

• Utilize JWT tokens for secure authentication and authorization

• Consider using libraries like Angular JWT for easier token management

Angular uses Zone.js for change detection mechanism to track changes in the application and update the view accordingly.

• Angular uses Zone.js for change detection mechanism

• Zone.js monkey patches async operations to trigger change detection

• Change detection can be triggered manually using ChangeDetectorRef

Communication between different components is achieved through various methods like props drilling, context API, event emitters, and state management libraries.

• Props drilling: Passing data from parent to child components through props.

• Context API: Provides a way to pass data through the component tree without having to pass props down manually at every level.

• Event emitters: Emitting events from one component and listen...read more