IT Fundamentals: Chapter 2

Priya is working on a school project where she needs to include an audio file. She is unsure about the common file extensions used for audio files. Can you help her choose the correct file extension from the following options?

• mp4

• avi

• wav

• mov

Emma, Evelyn, and Aria are working on a school project where they need to include a video file. Which of the following file extensions should they look for while searching for video files?

• mp4

• aiff

• wma

• aac

True or False: Bit depth is how many bits are used to encode each individual sample in an audio recording

• True

• False

True or False: Color depth is the measure of how many pixels are in each individual image in a picture or video.

• True

• False

Answer explanation

Resolution

True or false: Computer monitors are made up of tiny red, green, and blue lights

• True

• False

In terms of processing speed, would you rather have a Hertz, Megahertz, or Gigahertz?

• Hertz

• Megahertz

• Gigahertz

What causes sound?

True or False: Audio and image files use Lossless compression to take advantage of the limitations of human sight and hearing

• True

• False

Answer explanation

lossy

True or false: Sampling rate is a measure of how many samples are made from an audio wave each second

• True

• False

Oliver, Sophia, and Benjamin are working on a school project where they need to use a file extension that is commonly used for both audio and video files. Which file extension should they use?

• mp4

• wmv

• midi

• aac