Font size
WorksheetsData Representation
Total questions: 25
Worksheet time: 18mins
Hexadecimal number system is a base (a) system
Convert Binary into Hexadecimal:
1011 1110 0001
CE2
6ED
BE1
9G2
Shift this Binary 3 places left:
0001 0101
1010 1000
1000 1010
0101 0100
0000 1111
Add the 2 Binaries:
0010 0111
and
0100 1010
1001 0101
0111 0001
1011 1111
0001 1000
What is meant by sampling resolution (bit depth)?
The number of bits per sample.
The number of bytes per sample.
The number of pixels per sample.
The number of data per sample.
Bitmap images are made up of (a)
The number of bits used to represent each color is called the (a)
What is an Image Resolution?
Number of pixels in an image.
Number of bits in an image.
Number of bytes in an image.
Number of data in an image.
Main drawback of high resolution images?
Increase in file size
Increase in pixels
The quality of Image.
No drawbacks.
A (a) is the basic unit of all computing memory storage terms.
File size of an image is calculated as:
Image resolution (in pixels) x colour depth (in bits)
Sample rate x sample resolution x length of sample
Image resolution + colour depth
Image resolution - colour depth
How many bits are used in ASCII?
(a)
How many Bytes are used in Unicode?
(a)
ASCII code is represented in 16 bits
TRUE
FALSE
UPPER and lower case letters have a different ASCII code
TRUE
FALSE
ASCII can represent non-European languages
TRUE
FALSE
What is the maximum number of values that can be represented in 8 bits
16
256
65,536
128
A character set is...
What language can be used in a computer system
The fonts the computer has installed
The possible characters that can be represented by a computer system
Which of the following is not stored as metadata about an image?
Height
Colour depth
Resolution
Number of people in the image
How many colours can be represented with a 4 bit colour depth?
(a)
What unit is a sound's sample rate measured in?
bits per second (bps)
Hertz (Hz)
Megabits per second (Mbps)
Refers to the compression when some of the data from the original file is lost
lossless
300 dpi
lossy
cmyk
Which is a pro of your file being lossy
quality is loss
reduce download time
lower quality
can't get original back
Which is a con of your file being lossy
reduced file size
reduced download size
quality loss
easy uploading
Which is a pro of Lossless
larger files vs. lossy files
low low low quality
its become pixelated
No loss of quality when compressed
