Unit 1 Digital Information (Modified)

Front

How do computing devices represent information?

Back

A computer represents data as bits which is either a 0 or a 1

Front

Which of the following are true about how analog data is converted to digital data? The digital version is a representation of the analog, but cannot contain all of the details. , To make the digital version be a more accurate representation of the analog data, the process should use fewer bits to represent each sample., A longer interval between measured samples means more details will be captured in the conversion from analog to digital., The digital version contains all of the details of the analog data, as long as enough storage capacity is available.

Back

The digital version is a representation of the analog, but cannot contain all of the details.

Front

How many bits are in two bytes of data?

Back

16

Front

The binary number 1001 is equal to what in decimal?

Back

9

Front

With 8 bits of data, what is the largest decimal number that can be represented in binary?

Back

255

Front

The number 43, when represented in binary is

Back

0010 1011

Front

A computer uses 3 bits of data to represent a number. What is the smallest number that would cause an overflow error in this situation?

Back

8

Front

ASCII is an abstraction because

Back

the user can type letters and other characters without knowing the binary code assigned to them.

Front

Which of the following statements about sampling is incorrect?

• Sampling is a process that can be used to compress an image.
• Sampling is a process for turning an analog image into a digital image.
• When smaller samples are used, the resulting file will require fewer bytes.
• Each pixel of the analog image is coded as one color, and cannot be more than one color.

Back

When smaller samples are used, the resulting file will require fewer bytes.

Front

What is the difference between Lossy and Lossless compression?

Back

Lossless compression will usually reduce a file size less than Lossy compression.