What are basic questions of JavaScript?
JavaScript Interview Questions
- 2) List some features of JavaScript.
- 3) Who developed JavaScript, and what was the first name of JavaScript?
- 4) List some of the advantages of JavaScript.
- 5) List some of the disadvantages of JavaScript.
- 6) Define a named function in JavaScript.
- 7) Name the types of functions.
What is JavaScript short answer?
JavaScript is a lightweight, interpreted programming language with object-oriented capabilities that allows you to build interactivity into otherwise static HTML pages. The general-purpose core of the language has been embedded in Netscape, Internet Explorer, and other web browsers.
What would be the result of 3 2 7 in JavaScript HTML?
What would be the result of 3+2+”7″? Since 3 and 2 are integers, they will be added numerically. And since 7 is a string, its concatenation will be done. So the result would be 57.
What are the important topics in JavaScript for interview?
10 Important JavaScript Concepts for Interview
- Truthy and Falsy values. By default, javascript considers some values as true and the others false.
- Null vs Undefined.
- Double Equal ( == ) vs Triple equal ( === )
- Scope.
- Block scope.
- Closuer.
- Bind.
- Call.
What is a {} in JavaScript?
So, what is the meaning of {} in JavaScript? In JavaScript, we use {} braces for creating an empty object. You can think of this as the basis for other object types. Object provides the last link in the prototype chain that can be used by all other objects, such as an Array.
What is callback in JavaScript?
A JavaScript callback is a function which is to be executed after another function has finished execution. A more formal definition would be – Any function that is passed as an argument to another function so that it can be executed in that other function is called as a callback function.