iEnergizer Customer Service Representative Interview Questions and Answers

Component communication in Angular involves passing data between components.

• Parent to child communication using @Input decorator

• Child to parent communication using @Output decorator and EventEmitter

• Sibling component communication using a shared service

• Example: Passing data from parent component to child component using @Input() decorator

• Example: Emitting an event from child component to parent component using @Output()

Angular and React have different life cycle methods for components.

• Angular has OnInit, OnDestroy, and ngOnChanges methods.

• React has componentDidMount, componentWillUnmount, and componentDidUpdate methods.

• These methods allow developers to control what happens at different stages of a component's life cycle.

• For example, ngOnInit in Angular is called when a component is initialized, while componentDidMount in React is cal

Call, apply and bind are methods used to manipulate the 'this' keyword in JavaScript.

• Call method allows you to call a function with a specified 'this' value and arguments provided individually.

• Apply method allows you to call a function with a specified 'this' value and arguments provided as an array.

• Bind method returns a new function with a specified 'this' value and arguments provided as a list.

• Example: function greet...read more

ES6 features are new additions to JavaScript that make coding easier and more efficient.

• Arrow functions for concise syntax

• Let and const for block scoping

• Template literals for string interpolation

• Destructuring for easy object and array manipulation

• Spread and rest operators for easy array manipulation

• Classes for object-oriented programming

• Promises for asynchronous programming

• Default parameters for function arguments

• Modul