Data Representation File Sizes and Formats

What do electronic circuits use to represent and process binary digits?

• Sound

• Light

• Electricity

• Magnetism

What do hard disks use to represent and process binary digits?

• Sound

• Light

• Electricity

• Magnetism

What do optical disks (such as CDs, DVDs, and Blu-ray Discs) use to represent binary digits?

• Sound

• Light

• Electricity

• Magnetism

Which of the following are used to transmit information between digital devices? (Select all of the answers that you believe to be correct. There may be more than one.) For each of the options that you select, provide a specific example:

• Water Example: .................................................

• Magnetism Example: .................................................

• Electricity Example: .................................................

• Light Example: .................................................

• Sound Example: .................................................

How many bytes is 720KB (kilobytes)?

• 720 bytes

• 90 thousand bytes

• 720 thousand bytes

• 5,760 thousand bytes

• 720 million bytes

How many bits is 720KB (kilobytes)?

• 720 bits

• 90 thousand bits

• 720 thousand bits

• 5,760 thousand bits

• 720 million bits

Which unit would you find most appropriate to describe this size of 24,763,158 bytes?

• Kilobytes

• Megabytes

• Gigabytes

• Terabytes

In wireless communications, binary digits are transferred using ___.