Infosys Angular Developer Interview Questions and Answers

Authentication verifies the identity of a user, while authorization determines what a user can access.

• Authentication confirms the user's identity through credentials like username and password.

• Authorization controls the user's access to resources or features based on their authenticated identity.

• Example: Logging into a website (authentication) and then being able to view/edit specific pages based on user roles (au...read more

Agile is a project management methodology that emphasizes flexibility, collaboration, and iterative development.

• Agile focuses on delivering working software in short, iterative cycles called sprints.

• It values customer collaboration, responding to change, and continuous improvement.

• Scrum and Kanban are popular Agile frameworks used in software development.

• Agile promotes self-organizing teams and regular feedback to...read more

Methods to transfer data between components in Angular include Input and Output properties, ViewChild, Services, and Event Emitters.

• Using Input and Output properties to pass data from parent to child components and emit events from child to parent components.

• Using ViewChild to access child components and their properties directly from the parent component.

• Using Services to create a shared service that can be injec...read more

Flexbox is a layout model in CSS that allows for dynamic and responsive design of web pages.

• Flexbox is used to create flexible layouts that can adapt to different screen sizes and orientations.

• It allows for easy alignment and distribution of elements within a container.

• Flexbox properties include display: flex, flex-direction, justify-content, align-items, and flex-grow.

• Example: display: flex; justify-content: cent...read more

Attributes in HTML provide additional information about an element and are defined within the element's start tag.

• Attributes are used to modify the behavior or appearance of an HTML element.

• They are specified within the opening tag of an element using name-value pairs.

• Examples include 'href' in an anchor tag (<a href='https://www.example.com'>) and 'src' in an image tag (<img src='image.jpg'>).

setTimeout function in JavaScript is used to execute a function after a specified amount of time.

• setTimeout function takes two parameters: a function to be executed and a time delay in milliseconds

• Example: setTimeout(function(){ console.log('Hello!'); }, 2000); will log 'Hello!' after 2 seconds

• You can also pass additional arguments to the function being executed

A directive in Angular is a marker on a DOM element that tells Angular to attach a specific behavior to that element.

• Directives are used to extend HTML with new attributes or elements.

• They can be classified into three types: Component, Structural, and Attribute directives.

• Examples include ngIf, ngFor, and ngStyle.

Validations are checks performed on user input to ensure data integrity and accuracy.

• Validations are used to ensure that data entered by users meets certain criteria.

• Common types of validations include required fields, data type checks, length restrictions, and pattern matching.

• Angular provides built-in validators like required, min/max length, pattern, and custom validators.

• Validators can be applied to form contr...read more