Data Units Flashcards
1
Q
Why does data need to be stored as binary?
A
Computers can only read and understand binary.
2
Q
What is a bit
A
A single binary digit(0 or 1)
3
Q
What is a nibble
A
4 bits
4
Q
What is a byte
A
8 bits(enough to store a single character)
5
Q
What are the units of file sizes smallest to the largest(8)
A
Bit nibble byte kilobyte megabyte gigabyte terabyte petabyte
6
Q
Convert 01100101 into denary
A
101
7
Q
Convert 79 into binary
A
01001111
8
Q
Samantha is a musician. She has compressed each song to 900KB. Her USB memory stick contains 1.2GB of free storage. How many songs can she fit on the
USB stick? [2]
A
1.2 x 1000 x 1000 = 1,200,000 / 900
= 1333 songs
9
Q
A CD has a capacity of 650MB. How many 0.2GB audio files can be stored on the
CD? [2]
A
650MB = 0.65GB
0.65 / 0.2 = 3.25
= 3 audio files
