JSS2: COMPUTER STUDIES  1ST TERM

Computer Software  Week 13 Topics1 Quiz

Operating System  Week 29 Topics1 Quiz

Computer Memory: Primary And Secondary Memory  Week 35 Topics1 Quiz

Computer Memory II: Secondary / Auxiliary / External Memory  Week 43 Topics1 Quiz

Number System I  Week 54 Topics1 Quiz

Number System II  Week 62 Topics1 Quiz

Units of Storage In Computer  Week 73 Topics1 Quiz

Problem Solving Skills With Computer  Week 87 Topics1 Quiz

Computer Programming Languages  Week 93 Topics1 Quiz
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Conversion From One Unit To Another
8 bits = 1 byte
1000 bytes = 1kilobyte
1000 kilobytes = 1 megabyte
1000 megabytes = 1 gigabyte
1000 gigabytes = 1 terabyte
Kilobyte: abbreviated as KB is a unit of measurement equivalent to one thousand bytes of computer memory or disk capacity. A byte is a value which is represented by 8 bits and a bit is a binary digit comprising of either 0 or 1. In computer data storage, you are allowed a total of 1024 bytes before you use up 1KB. In decimal systems, kilo stands for 1000 but the computer world is based on a binary system of twos instead of tens. So, a kilobyte is actually 1,024 bytes.
Megabyte: abbreviated as MB is a unit of measurement equivalent to 1024 Kilobytes (1024 x 1024 bytes) meaning that you can use over 1 million bytes before you use up one MB.
Gigabyte: which is abbreviated as GB is a unit of measurement approximately equal to one billion bytes. Gigabyte is the most common term used to describe the size of a hard drive and memory these days. In 1995, people that had up to 10GB hard disk capacity were regarded as big shorts in computing in Nigeria but today, we talk about 500 GB, Terabyte, and Pet byte.
Terabyte: abbreviated as TB is a unit of measurement approximately to one trillion bytes. All of the books in a standard University library can be accommodated in 1TB and you will still have unused spaces.
Petabyte: Many years to come, we may not have finished using a Terabyte, that is a trillion bytes. A petabyte is a thousand trillion bytes. Old people in the villages refer to Petabyte as “count and die”.
Classwork:
1. Convert 4 bytes to bit
2. Convert 40 gigabytes to megabyte
Solution:
1. Since 1 byte = 8 bits
4 bytes = \( \frac{8}{1} \scriptsize \: \times \: 4 \\ \scriptsize = 32 \: bits\)
2. Since 1 gigabyte = 1000 megabytes
40 gigabytes = \( \frac{1000}{1} \scriptsize \: \times \: 40 \\ \scriptsize = 40,000 \: megabytes\)
Evaluation:
1. Convert 8 bytes to a bit
2. How many kilobytes make 1 gigabyte
3. 70 megabytes is equivalent to how many kilobytes?
Solution:
1. Convert 8 bytes to a bit
1 byte = 8 bits
Therefore, 8 bytes = 8 x 8 = 64 bits
2. 1000 megabytes = 1 gigabyte
Since 1000 kilobytes = 1 megabyte
1 gigabyte = 1000 x 1000 = 1,000,000 kilobytes
3. 70 megabytes is equivalent to how many kilobytes?
1000 kilobytes = 1 megabyte
70 megabytes = 70 x 1000 kilobytes
Therefore, 70 megabytes = 70,000 KB
Thanks for the help