Knowledge quiz

It's time to put what you've learned to the test, get 8 right to pass this week.

What is the maximum value of a color channel?

Choose the correct answer.

100

-255

255

What does the wavelength indicate when plotting the samples of a sound?

Choose the correct answer.

Pitch of the sound

Volume of the sound

Instrument from which the sound originates

Length of the whole sound

Which color model is used in the pen category?

Choose the correct answer.

CIECAM02

RGB

HSV

CMYK

How many different colors can you possibly represent with the RGB color model?

Choose the correct answer.

255^3 = 16777216

255*3 = 765

255^4 = 4228250625

255*4 = 1020

Which color attribute does not contribute to setting the pen color in Snap! ?

Choose the correct answer.

Translucency

Saturation

Hue

Brightness

Which of the following statements about the term frequency are true?

There are three correct answers.

The term frequency describes the value range of the samples.

The unit used for frequency is Hertz (Hz).

The frequency of samples in a sound determines its pitch.

The absolute number of samples of a sound is called frequency.

Frequency measures the number of occurrences of a repeating event for a unit of time.

Which of the following statements about analog and digital signals are true?

There are two correct answers.

Analog signals have infinite resolution in theory.

Digital signals have a higher resolution than analog signals.

Digital signals have discrete values.

The word digital comes from the latin word “digitus” which means number.

Which HSV values will result in a bright blue color?

Choose the correct answer.

Hue 90, saturation 0, brightness 100

Hue 55, saturation 100, brightness 30

Hue 30, saturation 30, brightness 30

Hue 55, saturation 30, brightness 100

10.

What is the frequency of a sound played at 44 100 Hz with the same 105 samples repeated?

Choose the correct answer.

44100 Hz

105 Hz

420 Hz

401 Hz

Knowledge quiz

What is the maximum value of a color channel?

Which of the following values could be samples from your microphone?

What does the wavelength indicate when plotting the samples of a sound?

Which color model is used in the pen category?

How many different colors can you possibly represent with the RGB color model?

Which color attribute does not contribute to setting the pen color in Snap! ?

Which of the following statements about the term frequency are true?

Which of the following statements about analog and digital signals are true?

Which HSV values will result in a bright blue color?

What is the frequency of a sound played at 44 100 Hz with the same 105 samples repeated?