Skalable Technologies Interview Questions and Answers

Pipe is a feature in Angular that allows you to transform data in templates. Pure pipes are called only when a pure change to the input is detected, while impure pipes are called every time change detection runs.

• Pipe is a feature in Angular used to transform data in templates

• Pure pipes are called only when a pure change to the input is detected

• Impure pipes are called every time change detection runs

Lazy loading is a technique used to defer loading non-essential resources until they are actually needed.

• Lazy loading helps improve performance by only loading resources when required

• In Angular, lazy loading is achieved by creating separate modules for different parts of the application

• Lazy loading is implemented using the loadChildren property in the route configuration

Slice method returns a shallow copy of a portion of an array into a new array, while splice method changes the contents of an array by removing or replacing existing elements.

• Slice method does not modify the original array, while splice method does

• Slice method takes two arguments - start and end index, while splice method takes three arguments - start index, number of elements to remove, and optional elements to add

• Example of slice method: let arr = [1, 2, 3, 4, 5]; let newAr...read more

Angular life cycle consists of several phases that a component goes through from creation to destruction.

• Angular components go through several life cycle hooks such as ngOnInit, ngOnChanges, ngOnDestroy, etc.

• ngOnInit is used for initialization logic, ngOnChanges is used for detecting changes in input properties, ngOnDestroy is used for cleanup tasks.

• Life cycle hooks allow developers to tap into key moments in a component's life cycle.

Angular is a popular front-end framework for building dynamic web applications.

• Angular is developed and maintained by Google.

• It uses TypeScript for building applications.

• Angular provides features like two-way data binding, dependency injection, and routing.

• Components are the building blocks of Angular applications.

• Angular CLI is used for creating, building, and testing Angular projects.