Binary Representation

Which of following are not normally written as binary numbers?

• MAC address
• Logic gate inputs
• Machine code

Which does not affect playback quality of a sound file?

• Amplitude
• Bit rate
• Sample frequency
• Sample resolution

How does increasing colour depth affect an image file?

• Increases number of colours in image
• Increases resolution of image
• Increases image width
• Decreases metadata for an image 

Compression helps when sending files over the Internet because...

• Less packets have to be sent so it is quicker
• Lossy compression is better
• Routers can recognise zipped files
• Lossless compression is better

Convert B2 from hex to denary

• 178
• 14
• 256
• 10011110

Why is hex easier than decimal when used to represent binary numbers?

• Because 16 is a power of 2
• Hex is easier to read than decimals
• Trick question, it actually isn't
• Hex uses numbers AND letters

What would you NOT find in a bitmap file

• mathematical expressions to describe the shapes in the image
• metadata
• code for the colour depth
• a series of pixels coded as binary

Why do computers work with binary data?

• Electronics with only 2 states are less error prone
• Computers can only count to 2
• Because binary is what machine code is written in
• Because buses are the connections between components

What is the biggest number that can be stored as 8 bits?

• 255
• 256
• 8
• 16

How many kilobytes are in a gigabyte

• 1024
• 2¹⁰
• 2²⁰
• 10