Representing Images

Multiple Choice

What is Binary?

• A system that uses 10 digits

• A system that uses 2 digits

• A system that uses 8 digits

• A system that uses 16 digits

Multiple Choice

Which of these is NOT a valid binary addition result?

• 0 + 0 = 0

• 0 + 1 = 1

• 1 + 1 = 1 0

• 1 + 0 = 2

Multiple Choice

What is the 8-bit binary digit 11001111 in denary?

• 199
• 207
• 208
• 206

Multiple Choice

Convert denary 150 to 8-bit binary.

• 10010110
• 10011010
• 10010101
• 10100110

Multiple Choice

What is the Denary number for 01010111

• 87

• 85

• 112

• 50

Multiple Choice

What is a pixel?

• A group of bits

• The smallest unit of a digital image

• A colour code

• A binary file

Multiple Choice

What does the term “bit” stand for?

• Binary item

• Binary digit

• Binary text

• Binary tool

Multiple Choice

What does colour depth measure?

• The height and width of an image

• The number of bits used to represent each pixel

• The brightness of colours

• The number of bytes in a file

Multiple Choice

What is a bitmap image made up of?

• Mathematical equations

• Coloured pixels

• Sound waves

• Binary digits only

Multiple Choice

What does a vector image store?

• Pixels

• Binary patterns

• The mathematics needed to draw shapes

• File names

Multiple Choice

Which type of image is best for a company logo?

• Bitmap

• Vector

• Photograph

• Text file

Multiple Choice

How many colours can be represented by 3 bits per pixel?

• 4

• 6

• 8

• 16

Multiple Choice

What formula is used to calculate the number of colours?

• Width × Height

• $$2^n$$

• Height ÷ Width

• n + 2

Multiple Choice

Which of the following provides the most colours?

• 1-bit colour

• 4-bit colour

• 8-bit colour

• 2-bit colour

Multiple Choice

What does image resolution measure?

• The number of bytes in a file

• Pixel density (dots per inch)

• Colour combinations

• File speed

Multiple Choice

What happens when pixels are smaller?

• The image becomes blurrier

• Fewer pixels fit on the screen

• Pixel density increases

• The image file size decreases

Multiple Choice

What is metadata?

• Data about the image, such as width, height, and colour depth

• A type of colour code

• A way to compress files

• The image background

Multiple Choice

Why is metadata important?

• It stores colour depth only

• It helps the computer display the image correctly

• It adds sound to an image

• It increases resolution

Multiple Choice

What formula is used to calculate bitmap file size?

• Width × Height × Colour Depth

• Width + Height × Colour Depth

• Width × Colour Depth ÷ Height

• Width ÷ Colour Depth

Multiple Choice

If an image is 10 pixels wide, 8 pixels high, and uses 4 bits per pixel, what is the file size?

• 400 bits

• 80 bits

• 40 bits

• 800 bits

Multiple Choice

Increasing colour depth and resolution will:

• Decrease the image quality

• Reduce file size

• Increase file size

• Have no effect

Multiple Choice

Why do digital photographers often use 24-bit colour depth?

• It reduces image clarity

• It allows more than 16 million colours

• It takes up less space

• It uses grayscale only

Multiple Choice

Which statement about bitmap and vector images is true?

• Bitmaps are made up of pixels; vectors use mathematical formulas

• Vectors use pixels; bitmaps use formulas

• Both are pixel-based

• Both lose quality when resized

Multiple Choice

Why might a graphic designer choose a vector image format for company branding?

• It uses fewer colours

• It scales without losing quality

• It’s easier to store in binary

• It has smaller resolution

Multiple Choice

What happens to the file size if you double the image resolution but keep colour depth the same?

• It stays the same

• It doubles

• It halves

• It becomes black and white

Multiple Choice

Which statement best summarises image representation?

• Images are stored using sound waves

• Images are stored in binary as either bitmaps or vectors

• Images are made of letters and digits

• Images cannot be represented digitally

Multiple Choice

What two factors mainly affect image file size?

• Resolution and colour depth

• Height and width only

• Binary and ASCII

• Bit and pixel

Multiple Choice

Bitmap images are made up of:

• Pixels

• Numbers

• Sounds

• Letters

Multiple Choice

The smallest unit of a digital image is called a ________.

• pixel

• byte

• vector

• sample

Multiple Choice

Explain why bitmap images can become blurry when resized.

• Each pixel is enlarged, causing loss of detail

• Vector mathematics improves clarity when enlarged

• Metadata changes the file type during resizing

• Colour depth automatically decreases when resizing

Multiple Choice

The greater the ________, the more colours an image can display.

• colour depth

• resolution

• width

• brightness

Multiple Choice

A 24-bit image can display how many colours?

• 65,536

• 16.7 million

• 256

• 1024

Multiple Choice

What does image resolution measure?

• Image brightness

• Pixel density

• Colour variation

• File type

Multiple Choice

Higher resolution means more ________ per inch, leading to clearer images.

• pixels

• bytes

• colours

• bits

Multiple Choice

Why increasing resolution improves image quality.

• More pixels capture more detail

• It reduces colour depth automatically

• It lowers file size, removing compression artifacts

• It changes the file type to a clearer format

Multiple Choice

What does metadata store?

• The binary code for colours

• Information about the image

• Sound data

• Mathematical shapes