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CSC 121 - Final Exam Study Guide 2024/2025 Questions With Completed & Verified Solution. $10.49   Add to cart

Exam (elaborations)

CSC 121 - Final Exam Study Guide 2024/2025 Questions With Completed & Verified Solution.

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  • Course
  • WGU D467 2024
  • Institution
  • WGU D467 2024

CSC 121 - Final Exam Study Guide 2024/2025 Questions With Completed & Verified Solution.

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  • September 17, 2024
  • 4
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • WGU D467 2024
  • WGU D467 2024
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CSC 121 - Final Exam Study Guide

Sounds - ANS Inherently analog values with specific amplitudes and frequencies

Analog Sound Waves - ANS Continuous sound waves are created in response to vibrations in
the surrounding air, such as a drumstick hitting a drum pad (Must be converted to a sequence of
discrete values)

Digital Sampling - ANS A process In which the amplitude of a wave is measured at regular
intervals and stored as discrete measurements

MP3 player - ANS Introduced in 1993 - uses techniques to reduce file size by 75-95%. Lossy
format.

CD Player - ANS Introduced in 1982. Before then, music piracy was almost non-existent

Images - ANS Inherently analog

Resolution - ANS The sharpness or clarity of an image

Grayscale Image - ANS Each pixel is a shade of gray - somewhere between black and white.
The image formats 8 bits for a grayscale pixel--256 shades of gray and 8x storage of black and
white

Color Images - ANS Gets broken into red, green, & blue components on a 0-255 scale.
16,777.216 different color combinations can be represented. Require 3x storage of grayscale,
and 24x the storage of black and white

Color Bit maps - ANS Can be extremely large, 12 megapixel image-12 million pixels-26 MB of
storage

GIF - ANS a lossless format (No info is lost in the compression) for image files that support both
animated and static images. 25-50% reduction possible

PNG - ANS A more modern, lossless alternative to GIF - more colors. 10-50% smaller than GIF
(33-75% reduction from bitmap)

JPEG - ANS A lossy format, so the compression is not fully reversible (but more efficient)
90-95% reduction is possible

Steganography - ANS Practice of hiding a secret message in plain sight within another message
or object

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