Understanding Image Representation in Computing

What is the term used for the tiny coloured blocks that make up images on a screen?

• Pixels

• Bits

• Bytes

• Elements

What does the term 'colour depth' refer to in image representation?

• The number of pixels in an image

• The range of colours available in an image

• The size of the image file

• The resolution of the image

How many colours can a 1-bit colour depth image represent?

• 1

• 2

• 4

• 16

What is the highest number of colour variations a 24-bit image can have?

• 256

• 1,024

• 16,777,216

• 65,536

What does DPI stand for in the context of image resolution?

• Dots Per Inch

• Data Per Inch

• Depth Per Inch

• Density Per Inch

What is the typical resolution of images on websites?

• 300dpi

• 150dpi

• 72dpi

• 600dpi

What is metadata in the context of image files?

• The pixels in the image

• Data about data

• The colour depth of the image

• The resolution of the image

Which of the following is NOT typically included in image metadata?

• File name

• Camera settings

• Number of pixels

• GPS location

What is the purpose of the start of image and end of image markers in a file?

• To indicate the file size

• To tell the computer where the list of pixels starts and ends

• To show the resolution of the image

• To display the colour depth

Which file formats are commonly used for images?

• PDF and DOCX

• JPEG and PNG

• MP3 and WAV

• TXT and CSV