Revision AS Binary-Coded Decimal (BCD) MCQs

What does BCD stand for?

• Binary Character Display

• Binary-Coded Denary

• Binary-Coded Decimal

• Bitwise-Coded Data

How many bits are used to represent one digit in BCD?

• 8

• 2

• 4

• 1

What is the BCD representation of the digit 5?

• 0101

• 1010

• 1101

• 0011

What is the BCD representation of the number 271?

• 0010 0111 0001

• 0010 0111 0100

• 0011 0011 0001

• 0110 1001 0100

What denary number does this BCD represent: 0100 0000 0011?

• 403

• 430

• 304

• 340

What is the main use of BCD in real-world applications?

• Text file compression

• Representing floating point values

• Displaying digits in devices like clocks or calculators

• Image storage

Why is BCD used in financial systems?

• It reduces storage needs

• It allows exact representation of monetary values

• It converts faster than binary

• It avoids decimals

What is the issue with using binary addition for decimal values like $0.37 + $0.94?

• It gives a negative result

• It truncates decimal digits

• It may result in invalid BCD digits

• It causes data loss

What is the BCD for the number 5006?

• 0101 0000 0000 0110

• 0101 0001 0001 0110

• 1000 0000 1001 0110

• 0101 0000 0010 0110

What happens if the result of BCD addition is greater than 1001 (decimal 9)?

• Nothing

• Result is converted to binary

• Add 0110 (decimal 6) to correct it

• Subtract 0110