Computer Studies Paper 2, WASSCE (SC), 2016

Question 3

  • (a)Convert the following numbers to the stated bases:
  •       (i)125.62510  to binary;
  •       (ii)111011.100112  to octal.
  • (b)Given that X = 11011011 and Y = 11101101,
  •       (i)construct the truth table for X.Y = Z;
  •      (ii)draw the logic gate of X.Y = Z;
  •     (iii)state the value of Z.

 

Observation

     (a)     (i)         125.62510 to binary

      1st Step:      12510 to binary

2

125

R

2

62

1

2

31

0

2

15

1

2

7

1

2

3

1

2

1

1

2

0

1

Therefore 12510 = 11111012