Computer Studies Paper 2, WASSCE (SC), 2021

Question 2

 

Perform the following conversations in the stated number bases:
      (a)  AB116 to octal system:
      (b)  1110111.1012 to denary system:
      (c)   5078 to binary system.

 

Observation

The question tested candidates’ knowledge on conversion of numbers from one base to another.
The expected answer is:

    1. AB1Hex to octal

   A              B          1
1010         1011    0001 ­­­­­___Step  1   

                    
=1010101100012
=101 010 110 001 _______Step 2    

                                  

=5     2     6      1
=5261Octal     ___________Step 3  

                          
OR      SECOND METHOD

 

= 273710

 

 

 

It was reported that the candidates who attempted this question showed good knowledge of number conversion.