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WAEC Computer Studies 2019 Paper

Question : 45

Total: 50

In BCD encoding system, 25, will be represented as?

Solution:

Concept:

In BCD, each decimal digit is converted separately into its 4-bit binary equivalent.

Explanation:

The decimal number is

25_{10}

, which has two digits:

2

and

5

Convert each digit to a 4-bit binary form:

2_{10} = 0010_2

5_{10} = 0101_2

Join the two 4-bit groups to get the BCD representation:

25_{10} = 0010\;0101 = 00100101

Therefore, the correct option is

C

Answer:

Option C:

00100101

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