IOTA : Web Development Bootcamp Quiz 3

What is the correct place to insert a Javascript file in HTML?

• head
• body
• both head and body

Which built-in method returns the calling string value converted to lower case?

• toLowerCase()
• toLower()
• changeCase(case)
• D - None of the above.

Which of the following function of Array object adds one or more elements to the front of an array and returns the new length of the array?

• sort()
• splice()
• unshift()
• toString()

Which of the following methods can be used to display data in some form using Javascript?

• document.write()
• console.log()
• window.alert()
• All of the above

How can a datatype be declared to be a constant type?

• constant
• var
• let
• const

What will be the output of the following code snippet?

<script type="text/javascript" language="javascript"> var a = "Scaler"; var result = a.substring(2, 4); document.write(result); </script>

• ale

• cal

• al

• cale

When an operator’s value is NULL, the typeof returned by the unary operator is:

• Object
• Boolean
• Undefined
• Integer

If you type the following code in console, what result will you get? 3>2>1 === false

• true

• false

What is the typeof NaN ?

• Object
• Number
• String
• Integer

What will be the output of the following code snippet?

a = [1, 2, 3, 4, 5]; print(a.slice(2, 4));

• 2, 3, 4

• 2, 3

• 3, 4 ,5

• 3, 4