Data Representation Year 9 Comp Sci

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In terms of data representation, what are each of the above, individually known as?

• A byte

• A bit

• A megabyte

• Denary

The elements of a digital image are called  pixels  (picture elements).

What is the term for the number of pixels within an image?

• Fidelity

• Pixel count

• Resolution

• 1080p

How many bits are contained in the following example?

• 100

• 120

• 10

• 200

The positive for a high resolution image is increased quality. What is the negative trade-off?

• Only one colour

• Increased representation (file) size

• It won't load on certain computers

• It can't be viewed on phones/tablets

Which of these is the most commonly seen colour depth?

• 12 or 18 binary digits per pixel

• 2 or 6 binary digits per pixel

• 24 or 32 binary digits per pixel

• 100 or 180 binary digits per pixel

What does this tool called on Photoshop?

• Rectangular Marquee Tool

• Move Tool

• Select Tool

• Pen Tool

What does this tool called on Photoshop?

• Polygonal Lasso Tool

• Eraser Tool

• Magnetic Lasso Tool

• History Brush Tool

What does this tool called on Photoshop?

• Polygonal Lasso Tool

• Eraser Tool

• Magnetic Lasso Tool

• History Brush Tool

What is the default setting for colour on Photoshop files?

• RGB 8 bit

• CMKY Colour 8 bit

• Grayscale 8 bit

• RGB 16 bit

Which of these statements best describes the function of a microphone...

• An output that converts variations in pressure to

  variations in electric voltage

• An input that converts variations in voltage to

  variations in pressure

• An input that converts variations in pressure to

  variations in electric voltage

• An input that converts variations in voltage to

  variations in pressure