Angular Interview Practice

What is the purpose of bootstrapping in the Angular execution cycle?

1. To configure the database connection

2. To initialize the root module and load the application

3. To load third-party libraries

4. To compile TypeScript files into JavaScript

The correct answer is: To initialize the root module and load the application

Bootstrapping in Angular is a crucial step in the application lifecycle that is specifically responsible for initializing the root module and loading the application. When an Angular application starts, the framework must create the application environment, which includes setting up the necessary dependencies and components defined in the root module. During the bootstrapping process, Angular identifies the root module (typically the `AppModule`), compiles its associated components and services, and begins to render the application in the browser. This process involves running the Angular compiler to prepare the application for user interaction, ensuring that it is ready to handle user inputs, routing, and data binding. This distinguishes bootstrapping from other processes. For instance, configuring a database connection would occur separately within the application logic, often within services or components rather than at the startup phase. Loading third-party libraries usually involves including them via script tags or npm packages, but this is not directly related to bootstrapping the Angular app itself. Compiling TypeScript files into JavaScript is part of the build process that occurs before the application runs, not during its bootstrapping. Thus, bootstrapping is fundamentally about initializing and loading the Angular application itself, making option B the correct choice.