JSS2: COMPUTER STUDIES - 1ST TERM
Computer Software | Week 13 Topics|1 Quiz
Operating System | Week 29 Topics|1 Quiz
Four Good Definitions of Computer Program
Advantages of Operating System
Examples and Uses of Operating System
Advantages of Windows Over The Earlier Operating System
Functions of Operating System
Gui And Command-Line O/S
- Four Good Definitions of Computer Program
Computer Memory: Primary And Secondary Memory | Week 35 Topics|1 Quiz
Computer Memory II: Secondary / Auxiliary / External Memory | Week 43 Topics|1 Quiz
Number System I | Week 54 Topics|1 Quiz
Number System II | Week 62 Topics|1 Quiz
Units of Storage In Computer | Week 73 Topics|1 Quiz
Problem Solving Skills With Computer | Week 87 Topics|1 Quiz
Computer Programming Languages | Week 93 Topics|1 Quiz
An Octal number is a number in base 8 and the place values increases in the power of 8.
Conversion from Decimal to Octal
The conversion is similar to binary conversion but the only difference is that rather than dividing by 2 for the binary number, we would divide by 8 for an octal number until the last number is zero.
The following steps could be taken. Continue to divide the decimal number by 8 until the last division is zero and save the remainder as in previous conversion.
Convert 400 to octal
Answer – 40010 = 6208
Convert 12 decimal to octal
Answer – 1210 = 148
Convert 10610 to octal
Answer – 10610 =1528
Convert 1024 to base 8
Answer – 102410 = 20008
We can also convert from other bases to Decimal as shown in the examples below
Convert 11110 to base 4
Answer – 11110 = 12334
Convert 28010 to hexadecimal
Answer – 28010 = 11816
Conversion of Octal to Decimal
Both the expansion and place value method could be used.
Convert 7248 to decimal
Answer – 7248 = 46810
Convert 210 8 to decimal
Answer – 2108 = 13710.