Opticodes Technologies Web Application Developer Interview Questions and Answers

Angular applications work by utilizing TypeScript to create components, services, and modules that interact with the DOM.

• Angular applications are built using TypeScript, a superset of JavaScript.

• Components are the building blocks of Angular applications, representing different parts of the UI.

• Services are used to share data and functionality across components.

• Modules help organize the application into cohesive blocks o...read more

Components and directives are key concepts in Angular framework for building dynamic web applications.

• Components are the basic building blocks of Angular applications, representing a part of the user interface.

• Directives are markers on a DOM element that tell Angular to attach a specific behavior to that element or transform it.

• Components are directives with a template.

• Examples: ngIf, ngFor, ngStyle, ngClass

Dependency injection in Angular is a design pattern where components are given their dependencies rather than creating them.

• In Angular, dependencies are injected into a component's constructor using TypeScript.

• This allows for better modularity, reusability, and testability of code.

• Dependencies can be provided at the module level or at the component level.

• Example: constructor(private userService: UserService) {}

To call an API in Angular, you can use the HttpClient module to make HTTP requests.

• Import the HttpClientModule in your app module

• Inject the HttpClient service in your component/service

• Use HttpClient's methods like get(), post(), put(), delete() to make API calls

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

My strengths include problem-solving skills, attention to detail, and strong communication. My weakness is that I can be overly critical of my own work.

• Strengths: problem-solving skills

• Strengths: attention to detail

• Strengths: strong communication

• Weakness: overly critical of my own work