Interview Questions and Answers

To set up the environment for building an Angular application, you need to install Node.js and Angular CLI.

• Install Node.js and npm

• Install Angular CLI using npm

• Create a new Angular project using CLI

• Run the project using ng serve command

Arrow functions are more concise and have a lexical 'this' binding compared to normal functions.

• Arrow functions do not have their own 'this' keyword, they inherit it from the parent scope.

• Arrow functions do not have their own 'arguments' object.

• Arrow functions cannot be used as constructors with 'new'.

• Arrow functions are more concise and have implicit return when no curly braces are used.

Angular is a front-end framework that uses HTML, CSS, and JavaScript to build dynamic web applications.

• Angular uses components to create reusable UI elements

• It uses services to share data and functionality across components

• It has a powerful template system that allows for easy data binding and manipulation

• Angular uses RxJS for reactive programming and observables

• It has a built-in router for handling navigation between pages

• Angular applications can be built and deployed as sin...read more

ES6 introduced new features to Javascript including arrow functions, let and const, classes, and template literals.

• Arrow functions provide a concise syntax for writing functions.

• Let and const are block-scoped variables.

• Classes provide a way to create objects with methods and properties.

• Template literals allow for string interpolation and multi-line strings.

• Destructuring allows for easy extraction of values from arrays and objects.

• Spread syntax allows for easy copying and merg...read more

CI/CD pipeline is a process of continuous integration and continuous delivery/deployment of software.

• CI/CD pipeline automates the software delivery process.

• It involves continuous integration of code changes, automated testing, and continuous delivery/deployment of software.

• It helps in reducing errors and improving the quality of software.

• Popular CI/CD tools include Jenkins, Travis CI, and CircleCI.

Count frequency of letters in a given string

• Create an array of size 26 to store the count of each letter (assuming only lowercase letters)

• Iterate through the string and increment the count of each letter in the array

• Print the count of each letter in the array

Components in Angular are reusable building blocks that encapsulate HTML, CSS, and TypeScript code.

• Components are the basic building blocks of an Angular application

• They are reusable and can be used across multiple pages

• Each component has its own HTML, CSS, and TypeScript code

• Components can communicate with each other using @Input and @Output decorators

• Examples of components include navbar, footer, and login form

Program to find 2 biggest numbers in array of strings

• Iterate through the array and convert each element to integer

• Keep track of the two biggest numbers found so far

• Return the two biggest numbers at the end