Best answer: What are variables used for in JavaScript programs Mcq?

What are variables used for in JavaScript programs?

JavaScript Variables

In a programming language, variables are used to store data values. JavaScript uses the keywords var , let and const to declare variables. An equal sign is used to assign values to variables.

What is the main use of JavaScript Mcq?

Explanation: JavaScript is designed for the following purpose: to style HTML pages b. to execute Queries related to databases on a server c. to add interactivity to html pages d. to perform server side scripting operations e.

What is this keyword in JavaScript Mcq?

What is this? The JavaScript this keyword refers to the object it belongs to. It has different values depending on where it is used: In a method, this refers to the owner object.

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Which is the correct way to write a JavaScript array in Mcq?

Which is the correct way to write a JavaScript array?

  1. var txt = new Array(1:”tim”,2:”kim”,3:”jim”)
  2. var txt = new Array_1=(“tim”)2=(“kim”)3=(“jim”)
  3. var txt = new Array(“tim”,”kim”,”jim”)
  4. var txt = new Array=”tim”,”kim”,”jim”

What are the types of variables in JavaScript?

In JavaScript, there are three different variable types: var , let , and const . Each of these variables have several rules around how they should be used, and have different characteristics.

How do you define a variable in JavaScript?

Creating a variable in JavaScript is called “declaring” a variable. You declare a JavaScript variable with the var keyword: var carName; After the declaration, the variable has no value (technically it has the value of undefined ).

What is the main use of JavaScript Mcq Brainly?

Explanation: JavaScript is a text-based programming language used both on the client-side and server-side that allows you to make web pages interactive.

What type of language is JavaScript Mcq?

It is used both on the client-side and server-side. 2. JavaScript is a ____________ language. Explanation: Although JavaScript is not an OOP (Object-Oriented Programming) language like Java or PHP, it is an object-oriented language.

Which of the following is correct about JavaScript Mcq?

Discussion Forum

Que. Which of the following is correct about JavaScript?
b. JavaScript has object-oriented capabilities that allows you to build interactivity into otherwise static HTML pages.
c. The general-purpose core of the language has been embedded in Netscape, Internet Explorer, and other web browsers.

What is keyword in JavaScript?

Keywords are reserved words that are part of the syntax in the programming language. For example, const a = ‘hello’; Here, const is a keyword that denotes that a is a constant.

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How does this keyword work in JavaScript?

this keyword refers to an object, that object which is executing the current bit of javascript code. In other words, every javascript function while executing has a reference to its current execution context, called this. Execution context means here is how the function is called.

How do you make a variable private in JavaScript?

Javascript Functions: Private Variables

Variables defined within a function are private because it cannot be accessed from outside the function, but this issue can be overcome by creating closures within function, which can access these variables using a scope chain.

What are all the JavaScript data types Mcq?

Explanation: These are the JavaScript Data types: Number, String, Boolean, Object, Undefined.

Which of the following is correct about features of JavaScript?

Q 3 – Which of the following is correct about features of JavaScript? A – JavaScript is is complementary to and integrated with HTML.

What is the correct JavaScript syntax to write Hello World in Mcq?

Answer is “document. write(“Hello World”)”

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