Angular Fundamentals: Interview Prep for Freshers Quiz

Test your understanding of key Angular concepts commonly faced in interviews for beginners. This quiz covers core features, components, modules, and basic principles you should know as a fresher.

1. 1. Understanding TypeScript in Angular

   What is TypeScript and why is it commonly used in Angular projects?

   1. A compiler for converting CSS files in Angular.
   2. A version of JavaScript that only works with HTML.
   3. A superset of JavaScript that adds static typing for safer code.
   4. A data storage system for Angular apps.
   5. A lightweight CSS framework used in Angular.

2. 2. Component Basics

   Which option best describes the role of metadata in an Angular component?

   1. It provides extra information like the component’s selector and template.
   2. It controls the color scheme of the component.
   3. It stores the values of user input fields.
   4. It is used to define database connections.
   5. It runs background scripts for performance.

3. 3. Dynamic Component Loading

   How can you load a component dynamically in an Angular application?

   1. By listing the component in the HTML file directly.
   2. By renaming app.module.ts to app.component.ts.
   3. By using ComponentFactoryResolver and ViewContainerRef.
   4. By compiling the CSS file at runtime.
   5. By replacing the main.ts file with the component code.

4. 4. Compilation Types

   Which statement accurately differentiates AOT (Ahead-of-Time) and JIT (Just-in-Time) compilation in Angular?

   1. JIT compiles templates with PHP, while AOT uses Python.
   2. AOT only works for CSS files, and JIT for HTML files.
   3. AOT compiles code at build time, JIT compiles it in the browser at runtime.
   4. JIT stands for Java Intuitive Tools in Angular.
   5. Both compile after the application has started in the browser.

5. 5. Lifecycle Hooks

   What is the purpose of lifecycle hooks such as ngOnInit in Angular components?

   1. They automatically upgrade Angular versions.
   2. They are used to create database tables.
   3. They allow developers to execute code at key moments in a component’s life.
   4. They handle user authentication only.
   5. They change the default port of the application.

6. 6. The Async Pipe

   Why would you use the async pipe in an Angular template?

   1. To check syntax errors in TypeScript files.
   2. To animate HTML elements in real-time.
   3. To subscribe to observables and display data automatically.
   4. To connect the app to external APIs.
   5. To validate form fields only.

7. 7. Error Handling with Services

   Which is a common way to handle errors in Angular services using HTTP requests?

   1. By only using POST methods for requests.
   2. By removing all service imports from app.module.ts.
   3. By declaring errors in the CSS file.
   4. By using the catchError operator with observables.
   5. By setting the HTTP status to 0 always.

8. 8. Observables and the Subscribe Method

   How does the subscribe() method relate to observables in Angular?

   1. It restricts access to the admin dashboard only.
   2. It compiles the main application module.
   3. It is used to listen and react to emitted values from an observable.
   4. It converts HTML templates to CSS.
   5. It sets the maximum app loading time.

9. 9. Purpose of the Common Module

   Why is the CommonModule important when building Angular applications?

   1. It manages application deployment settings.
   2. It stores user passwords safely.
   3. It provides common directives like ngIf and ngFor to use in components.
   4. It is required to handle all routing in the application.
   5. It defines the initial state of all services.

10. 10. Using the Animation Module

    What is the main function of the animation module in Angular?

    1. To create and manage smooth transitions and visual effects within the app.
    2. To format currency values in templates.
    3. To encrypt TypeScript files before deployment.
    4. To generate test data automatically.
    5. To build backend APIs for the application.