Alsager - Block 9 - All Bitmap

How do computers represent ALL information?

• Using decimal numbers

• Using analog signals

• Using binary code

• Using alphabetic characters

What formula shows the number of different binary patterns that can be represented in a given number of bits?

• 2^n

• n^2

• log(n)

• n!

What expression is used to calculate the file size of an image?

• Width + Height + Colour Depth

• Width x Height x Colour Depth

• Width / Height / Colour Depth

• Width - Height - Colour Depth

What is always a trade-off when considering the number of available bits in image representation?

• Colour and texture

• Resolution and storage space/bandwidth

• File format and compatibility

• Image quality and editing options

What are the units for file sizes?

• Pixels

• Centimeters

• Bytes

• Hertz

What formula shows the size of an image?

• image size = width in pixels + height in pixels

• image size = width in pixels / height in pixels

• image size = width in pixels x height in pixels

• image size = width in pixels - height in pixels

What is colour depth?

• The number of pixels needed to represent the colour of each pixel.

• The number of bits needed to represent the colour of each pixel.

• The number of colours that can be displayed on a screen.

• The number of bytes needed to represent the colour of each pixel.

What does each pixel in an image file require?

• A unique identifier

• A color depth generating some additional number of bits per pixel

• A metadata description

• A file extension

Why do we often ignore the metadata added to the top of an image file?

• Because it is encrypted and cannot be read

• Because it is not necessary for the image display

• Because it is quite small in relation to the storage for pixels

• Because it contains irrelevant information

How many bits are there in a nibble?

• 1 bit

• 2 bits

• 4 bits

• 8 bits