binary and logic

Question 1

versions of unicode + size of each

Answer 1

UTF-8 (1-4 bytes)

UTF-16 (2 or 4 bytes)

UTF-32 (4 bytes)

Question 2

what can u do to increase quality of image (2)

Answer 2

1. increase resolution (# pixels)
2. incfrease colour depth (# bits per pixel)

Question 3

how to calculate file size of audio file

Answer 3

file size = sampling rate (Hz) * bits per sample (bits) * duration (seconds) * number of chanels

Question 4

what is bit depth/colour depth of a bitmap image

Answer 4

bits per pixel

Question 5

how is audio stored in binary

Answer 5

split into sections (sampling rate; x axis; measured in Hz; standard is 44.1kHz)

y-axis is split into bits (bit depth)

Question 6

compression techniques of frames

Answer 6

1. spacial compression - reduces redundant info within each frame (colour depth, detail levels)
2. temporal compression - reducest redundant info between frames

Question 7

how much is one byte in bits

Answer 7

1 byte = 8 bits

Question 8

what is RGB and RGBA

Answer 8

RGB -> red, green, blue chanel; 1 byte per chanel

RGBA -> add alpha chanel (for transparent images)

Question 9

what is true colour

Answer 9

24 bit colour depth

Question 10

types of images

Answer 10

bitmap/raster
vector

Question 11

components of a video

Answer 11

-frames
-audio tracks
-meta data
-subtitles and closed captions

Question 12

how to calculate size of image

Answer 12

image size = width (pixels) * height (pixels) * colour depth (bits/pixel)

Question 13

how does UTF-8 work

Answer 13

first bits –> #1’s is number of bytes of the character, 0 represents the end of this indication

each subsequent byte starts with 10 to show continuation

Question 14

size of standard and extended ascii

Answer 14

standard: 7-bit
extended: 8-bit

Question 15

how does ascii work?

Answer 15

last 5 bit represet letter based on numerical place in alphabet (eg. 1=a; write 1 in binary)

first 3 bits represent upper/lower case
- 011 = lowercase
- 010 = uppercase