In the JavaScript code, why does the switchChannel function check if the new channel is the same as the last one?

b) To prevent consecutive same channels

a) To add a delay between channel switches

c) To ensure a smooth transition

What is the purpose of the JavaScript function turnOff in the provided code?

d) Toggles the background color of the screen

In the CSS code, what does the selector #knob-1:hover represent?

b) The knob-1 element when it is hovered

a) The knob-1 element when it is clicked

c) The knob-1 element when it is focused

d) The knob-1 element when it is active

How is the knob-1:hover style applied in the CSS code?

b) On hovering over the knob-1 element

a) On clicking the knob-1 element

c) On selecting the knob-1 element

d) On focusing on the knob-1 element

What is the purpose of the CSS property cursor: pointer; in the #knob-1 and #knob-2 styles?

a) Changes the cursor to a hand when over the knob-1 and knob-2

b) Sets the width of the cursor to a pointer

c) Adds a pointer to the knob-1 and knob-2

d) Hides the cursor when over the knob-1 and knob-2

In the JavaScript code, what does Math.floor(Math.random() * channels.length) do in the switchChannel function?

c) Rounds down to the nearest integer

a) Generates a random decimal number between 0 and 1

b) Picks a random channel from the channels array

d) Multiplies the length of channels by 2

What is the purpose of the float: right; property in the CSS styles for #knob-1 and #knob-2?

c) Floats the knobs to the right

a) Aligns the knobs to the right side of the TV

b) Makes the knobs float above other elements

d) Positions the knobs relative to the screen

BSD Retro TV : HTML, CSS, Javascript Quiz (Teacher Amon)

Quiz

•

Computers

•

8th Grade

•

Practice Problem

•

Hard

Amon Mishra

Used 1+ times

FREE Resource

18 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What HTML tag is used to define the root of an HTML document?

a) <body>

b) <head>

c) <html>

d) <root>

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which CSS property is used to set the font for an entire HTML document?

a) font-family

b) text-style

c) font-style

d) text-family

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the provided HTML code, what is the purpose of the <link> tag in the <head> section?

a) Defines a paragraph

b) Links an external stylesheet to HTML

c) Adds a clickable link

d) Embeds an image

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the CSS code, what does the property border-radius: 30px; do?

a) Sets the width of the border

b) Adds a border to an element

c) Sets the border color

d) Rounds the corners of an element

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of the JavaScript function switchChannel in the provided code?

a) Turns off the TV

b) Changes the color of the screen

c) Switches between TV channels

d) Adjusts the volume of the TV

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is the switchChannel function triggered in the HTML code?

a) On clicking the green knob

b) On clicking the red knob

c) On hovering over the screen

d) Automatically when the page loads

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of the screen.className property in the switchChannel function?

a) Changes the font of the screen

b) Adds a new class to the screen element

c) Sets the screen background color

d) Defines the TV channel

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BSD Retro TV : HTML, CSS, Javascript Quiz (Teacher Amon)

18 questions

What HTML tag is used to define the root of an HTML document?

Which CSS property is used to set the font for an entire HTML document?

In the provided HTML code, what is the purpose of the <link> tag in the <head> section?

In the CSS code, what does the property border-radius: 30px; do?

What is the purpose of the JavaScript function switchChannel in the provided code?

How is the switchChannel function triggered in the HTML code?

What is the purpose of the screen.className property in the switchChannel function?

What CSS property is used to create the animation effect for the TV channels in the provided code?

In the JavaScript code, why does the switchChannel function check if the new channel is the same as the last one?

What is the purpose of the JavaScript function turnOff in the provided code?

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