AP CSP Unit 2- Digital Information

How many bits make up one byte?

• 4
• 16
• 8
• 10

3 ASCII characters in a plain text document take up ___________ of storage space.

• 24 bytes
• 24 bits
• 64 bytes
• 64 bits

One terabyte of data is most likely be the size of

• a 3 minute music file
• the 7 Harry Potter novels
• 10 images
• 1 hard drive

Heuristics help computer scientists handle problems that are

• computationally hard
• impossible to solve
• lossy
• lossless

What does coming up with compression have in common with programming

• pattern recognition is required for both
• they both require funny symbols
• they are both simple
• both will have only one solution for each problem presented

To decompress a file you need the bytes resulting from the compression and the

• private key
• public key
• zip file
• dictionary

Which of the following is true about data compression?

• Data compression is only useful for files being transmitted over the Internet
• Regardless of the compression technique used, once a data file is compressed, it cannot be restored to its original size.
• Sending a compressed version of a file ensures that the contents of the file cannot be intercepted by an unauthorized user.
• There are trade-offs involved in choosing a compression technique for storing and transmitting data.

Select the answer that lists the units of bytes in ascending order (from smallest to largest)

• gigabyte, megabyte, terabyte
• megabyte, terabyte, kilobyte
• gigabyte, terabyte, megabyte
• kilobyte, gigabyte, terabyte

How many bytes does it take...?How many bytes (or bits) are required to encode an image that is 25 pixels wide and 50 pixels tall, if you encode each pixel with 3 bytes (24 bits) of RGB data.

• 1,250 bytes (10,000 bits)
• 1,253 bytes (10,024 bits)
• 3,750 bytes (30,000 bits)
• 3,753 bytes (30,024 bits)

How you would alter the RGB settings to brighten it?

• increase the RGB values
• decrease the RGB values