Question

The BCD code of decimal number 255 is

• A. 0010 0101 0101
• B. 1111 1111 1110
• C. 1111 1111 1111
• D. 0111 1111 1111

Hint:

In BCD, convert each decimal digit separately instead of converting the entire number into binary.

Answer 1

The Correct Option is A

Concept: BCD (Binary Coded Decimal) represents each decimal digit separately using 4 bits.

Step 1: Write each decimal digit.
\[ 255 = 2,\;5,\;5 \]

Step 2: Convert each digit into BCD.
\[ 2=0010 \] \[ 5=0101 \] \[ 5=0101 \]

Step 3: Combine the groups.
\[ 255 = 0010\;0101\;0101 \] \[ \boxed{0010\;0101\;0101} \]