JavaScripting

What is the correct syntax for referring to an external script “index.js” ?

• <script name=”index.js”>

• <script href=”index.js”>

• <noscript src=”index.js”>

• <script src=”index.js”>

Which of the following is not a keyword used to define a variable in ES6?

• var

• val

• const

• let

Which of the following lines of code can remove the class “nav” from the following element:

<div><div class=”nav”>Hello</div></div>

• document.getElementByClass(“nav”).classList.remove(“nav”)

• document.getElementById(“div”).removeClass(“nav”)

• document.querySelectorAll(“div”).classList.remove(“nav”)

• document.querySelector(“div”).removeClass(“nav”)

Which of the following is not valid when creating a function in JavaScript ?

• function ( ) => { }

• function functionName( ) = { }

• function functionName( ) { }

• const myFunction = functionName( ) { }

How can one get an attribute “attr” of an element <foo> ?

• foo.attributes[0]

• foo.attr

• foo.attributes.attr

• None of the above

How will you return an element with id=”first” ?

• document.getElementById(“first”)

• document.querySelector(“#first”)

• document.querySelector(“.first”)

• A and B both

• A and C both

How will you change the content inside an element <foo> to the text “Hello World” ?

• foo.innerHTML = “Hello World”

• foo.innerContent = “Hello World”

• foo.innerText = “Hello World”

• A and C both

• B and C both

Which of the following allows you to call a function based on an elapsed time ?

• setElapsedTime( )

• setInterval( )

• setTimeout( )

• setCountDown( )

Which event occurs when the user clicks on an HTML element using a mouse ?

• onMouseOver

• onChange

• onClick

• onMouseClick

Which of the following is opposite to an onMouseOver event ?

• onMouseOff

• onMouseOut

• onMouseUnder

• None of the above