How is our number system different from the binary system?

Our number system is base-10; the binary system is base-2

With regards to black and white images, which of the following is TRUE? A white pixel is represented by a "0" bit, "1" represents that pixel being turned on, "1" represents that pixel being turned off, The white pixel can be represented as either a "1" or a "0" bit

"1" represents that pixel being turned on

With regards to black and white images, which of the following is FALSE? A black pixel is represented by a "0" bit, "0" represents that pixel being turned off, "1" represents that pixel being turned off, A white pixel is represented by the "1" bit

"1" represents that pixel being turned off

Which of the following is TRUE regarding lossless and lossy compressions? An example of lossless compression is a .jpg file, Lossless uses inexact approximations while lossy does not· , You can completely reconstruct lossless but not lossy compression · , You can completely reconstruct lossy but not lossless compression

You can completely reconstruct lossless but not lossy compression ·

What is lossless compression?

Shrinking data without losing any of it.

Which of the following is TRUE regarding 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.

There are trade-offs involved in choosing a compression technique for storing and transmitting data.

A student is transferring photos from her camera to her computer. The student notices that the saved photos on her computer are lower quality than the original raw photo on her camera. Which of the following could be a possible explanation for the difference in image quality? The saved image files were compressed with a lossy compression technique. The saved image files were compressed with a lossless compression technique. The saved image files were not compressed properly. Some information is lost every time a file is saved on a computer.

The saved image files were compressed with a lossy compression technique.

A student is transferring photos from her camera to her computer. The student notices that the saved photos on her computer are lower quality than the original raw photo on her camera. Which of the following could be a possible explanation for the difference in image quality? The saved image files were compressed with a lossy compression technique. The saved image files were compressed with a lossless compression technique. The saved image files were not compressed properly. Some information is lost every time a file is saved on a computer.

The saved image files were compressed with a lossy compression technique.

Adding a bit to a binary number...

...doubles the number of values that can be represented.

Which of the following is FALSE regarding decimal and binary systems? Both systems use the concept of place value, While the binary number system uses ten digits (0-9), the decimal numbers system only uses two (0 and 1), In both systems, we can calculate each digit's value by multiplying the digit with its matching power of 2 or 10. The sum is the total value of the number., Each digit in the decimal number system corresponds to a power of 10, whereas each digit in the binary number system corresponds to a power of 2.

While the binary number system uses ten digits (0-9), the decimal numbers system only uses two (0 and 1)

When using bits to represent fractions of a number, which of the following is TRUE? (A) It is possible to represent all possible fractions, (B) The inability to represent numbers exactly results in roundoff errors, Both (A) and (B) are True, Both (A) and (B) are False

The inability to represent numbers exactly results in roundoff errors.

Which of the following would result in a better digital approximation of an analog black and white image? Increasing the size of each sample square, thus decreasing the number of samples taken Decreasing the size of each sample square, thus increasing the number of samples taken Using fewer bits to represent the image. Decreasing the size of each sample square, thus increasing the number of samples taken

Decreasing the size of each sample square, thus increasing the number of samples taken

Which statement about analog and digital images is true? Options: With advances in technology, digital images look exactly like the analog images they represent, Sampling an analog image more frequently produces a digital image with a better representation, Analog images come from data that is measured at regular intervals, Digital images come from data that is measures continuously

Sampling an analog image more frequently produces a digital image with a better representation

Which of the following is FALSE regarding intellectual property? Intellectual property can include images, written publications, and video creations When you create something digitally and leave it on the open web with no restrictions of how it can be used, anyone can use your creation without fear of legal consequences As the creator of something from your computer, you have complete control of how your creation gets used by others For something you create and place online, you don't have to have a label of "All Rights Reserved" in your creation to have copyright protection

When you create something digitally and leave it on the open web with no restrictions of how it can be used, anyone can use your creation without fear of legal consequences

Unit 1: Digital Information (APCSP '24-'25 code.org) Flashcards

Student preview

85 questions

Show all answers

1.

FLASHCARD QUESTION

Front

Convert the decimal 128 to binary:

Back

10000000

2.

FLASHCARD QUESTION

Front

Convert the decimal 65 to binary:

Back

01000001

3.

FLASHCARD QUESTION

Front

Convert the decimal 254 to binary:

Back

11111110

4.

FLASHCARD QUESTION

Front

Convert the binary number 00010001 to decimal:

Back

17

5.

FLASHCARD QUESTION

Front

Convert the binary number 11001100 to decimal:

Back

204

6.

FLASHCARD QUESTION

Front

Convert the binary number 00100100 to decimal:

Back

36

7.

FLASHCARD QUESTION

Front

A way of representing information using only two options

Back

Binary

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