rtCamp Solutions Interview Questions and Answers

A custom pipe in Angular is a feature that allows you to transform data in templates.

• Custom pipes are created by implementing the PipeTransform interface in a class.

• The class must have a transform method that takes input data and optional parameters.

• Custom pipes are then declared in the module's declarations array and can be used in templates.

• Example: Creating a custom pipe to format dates in a specific way.

Angular application bootstraps by loading the root module and then creating the component tree.

• Angular application bootstraps by loading the root module, which is defined in the 'AppModule' class.

• The 'AppModule' class contains metadata such as the list of components, directives, and services used in the application.

• After loading the root module, Angular creates the component tree by instantiating the root component specified in the 'AppModule' class.

• The root component then bo...read more

Apply and bind methods are used in Angular to bind data and functions to HTML elements.

• The apply method is used to call a function with a given this value and arguments provided as an array.

• The bind method is used to create a new function with a specified this value and initial arguments.

• Apply and bind methods are commonly used in event handling and data binding in Angular applications.

Java 8 introduced several new features including lambda expressions, functional interfaces, streams, and default methods.

• Lambda expressions allow you to write code in a more concise and readable way.

• Functional interfaces provide a way to define interfaces with a single abstract method.

• Streams allow you to process collections of objects in a functional style.

• Default methods allow you to add new methods to interfaces without breaking existing implementations.

DOM stands for Document Object Model. It is a programming interface for web documents that organizes the structure of a webpage.

• DOM is a tree-like structure that represents the elements of a webpage.

• It allows developers to manipulate the content, structure, and style of a webpage using scripting languages like JavaScript.

• DOM provides methods and properties to interact with elements on a webpage, such as changing text, adding or removing elements, and handling events.

I use Java version 8 for Angular development.

• I use Java 8 for its compatibility with Angular frameworks and libraries.

• Java 8 introduced features like lambda expressions and streams which are useful in Angular development.

• Example: I use Java 8 to write backend services for my Angular applications.

Closure is a feature in JavaScript that allows a function to access variables from its outer scope even after the function has finished executing.

• Closure is created when a function is defined inside another function.

• The inner function has access to the variables and parameters of the outer function, even after the outer function has returned.

• Closure is useful for creating private variables and encapsulation in JavaScript.

• Example: function outer() { var x = 10; function inner(...read more

Pipes in Angular are used for transforming data in templates.

• Pipes are used to format data before displaying it in the view

• They can be used to filter, sort, or transform data in various ways

• Examples include date pipe, currency pipe, and uppercase/lowercase pipe