What is JavaScript interview question answer?
Basic Javascript Interview Questions Answer: JavaScript is the most popular web scripting language, used for both client-side and server-side development. Supporting object-oriented programming abilities, the JavaScript code can be inserted into HTML pages that can be understood and executed by web browsers.
What is object in JavaScript interview questions?
Object properties can be any of the three primitive data types, or any of the abstract data types, such as another object. Object properties are usually variables that are used internally in the object’s methods, but can also be globally visible variables that are used.
Can I interview in JavaScript?
Doing an interview in JavaScript offers you 2 main advantages: The syntax is simple, intuitive, and easy to grasp — rather than spending the time remembering how to declare an array, you can spend more time thinking about the logic for your solution.
Should I interview in JavaScript?
They are judging you based on how well you can code and solve problems. Therefore they will encourage you to use whatever programming language you are most fluent and comfortable with. So, if JavaScript is the language you know best and can code best in, then it is the best language for you to use in an interview.
What would be the result of 3 2 7 in JavaScript?
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 is object method in JavaScript?
Introduction. Objects in JavaScript are collections of key/value pairs. Unlike Array prototype methods like sort() and reverse() that are used on the array instance, Object methods are used directly on the Object constructor, and use the object instance as a parameter. This is known as a static method.
What does NaN mean in JavaScript?
Not-A-Number
NaN is a property of the global object. In other words, it is a variable in global scope. The initial value of NaN is Not-A-Number — the same as the value of Number. There are five different types of operations that return NaN : Number cannot be parsed (e.g. parseInt(“blabla”) or Number(undefined) )
What are promises in JavaScript?
A Promise is a JavaScript object that links producing code and consuming code.