Binary Coded Decimal(BCD) MCQ’s

Digital Circuits Electronics & Communication Engineering

This set of Digital Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Binary Coded Decimal(BCD)”.

1. The decimal number 10 is represented in its BCD form as __________
a) 10100000
b) 01010111
c) 00010000
d) 00101011

2. Add the two BCD numbers: 1001 + 0100 = ?
a) 10101111
b) 01010000
c) 00010011
d) 00101011

3. Binary coded decimal is a combination of __________
a) Two binary digits
b) Three binary digits
c) Four binary digits
d) Five binary digits

4. Carry out BCD subtraction for (68) – (61) using 10’s complement method.
a) 00000111
b) 01110000
c) 100000111
d) 011111000

5. When numbers, letters or words are represented by a special group of symbols, this process is called __________
a) Decoding
b) Encoding
c) Digitizing
d) Inverting

6. How many bits would be required to encode decimal numbers 0 to 9999 in straight binary codes?
a) 12
b) 14
c) 16
d) 18

7. Code is a symbolic representation of __________ information.
a) Continuous
b) Discrete
c) Analog
d) Both continuous and discrete

8. A three digit decimal number requires ________ for representation in the conventional BCD format.
a) 3 bits
b) 6 bits
c) 12 bits
d) 24 bits

9. The excess-3 code for 597 is given by __________
a) 100011001010
b) 100010100111
c) 010110010111
d) 010110101101

10. The decimal equivalent of the excess-3 number 110010100011.01110101 is _____________
a) 970.42
b) 1253.75
c) 861.75
d) 1132.87

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