HTML, CSS, JavaScript, and React Quiz

Which attribute is used to provide a unique identifier to an HTML element?

• class

• id

• name

• tag

What does the tag in HTML stand for?

• Anchor

• Alignment

• Article

• Attribute

Which property is used to change the background color of an element?

• color

• bgcolor

• background-color

• background

How do you make text bold in CSS?

• font-bold: true;

• font-weight: bold;

• text-style: bold;

• text-weight: bold;

Which CSS property is used to control the spacing between lines of text?

• spacing

• line-height

• text-indent

• margin-top

Which CSS property controls the stacking order of elements?

• z-index

• position

• order

• stack

How do you declare a JavaScript variable?

• var x;

• dim x;

• declare x;

• int x;

What is the output of console.log(typeof null)?

• null

• object

• undefined

• string

Which method is used to parse a string to an integer in JavaScript?

• parseString()

• parseInt()

• toInteger()

• int()

How can you add a comment in JavaScript?

• // This is a comment

• /* This is a comment */

• # This is a comment