DTCC Software Developer Interview Questions and Answers

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 ...read more

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

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.

VueJS is a progressive JavaScript framework for building user interfaces, known for its simplicity and flexibility in development.

• Reactive Data Binding: VueJS provides a reactive data binding system that automatically updates the UI when the underlying data changes, enhancing user experience.

• Component System: VueJS allows developers to create reusable components, promoting modularity and maintainability in large applic...read more

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.

Demonstrating an API call using JavaScript's Fetch API to retrieve data from a public API.

• Use the Fetch API to make a GET request: fetch('https://api.example.com/data')

• Handle the response with .then() to convert it to JSON: .then(response => response.json())

• Use async/await for cleaner syntax: const response = await fetch('https://api.example.com/data');

• Handle errors with .catch() to manage any issues during the API ...read more

forEach is used to iterate over an array and perform a function on each element, while map creates a new array by applying a function to each element.

• forEach does not return a new array, while map does

• forEach does not modify the original array, while map creates a new array

• forEach is used for side effects, while map is used for transformation

• Example: forEach - array.forEach(item => console.log(item)), map - const newAr...read more