Number Systems and Codes MCQs

Question 1

The BCD number for decimal 16 is ________.

Accepted Answer

00010110

Answer

00010000

Answer

00010010

Answer

11100000

Question 2

Alphanumeric codes should include as a minimum:

Accepted Answer

the alphabet upper- and lowercase letters, the decimal digits, the seven punctuation marks, and other characters or symbols.

Answer

the capacity to represent the alphabet upper- and lowercase characters and the decimal numbers in a straight binary format.

Answer

the capacity to code all possible decimal numbers in a direct octal representation of BCD codes.

Answer

the ability to represent decimal numbers greater than 12810 in a straight binary format.

Question 3

Convert 52716 to binary.

Accepted Answer

010100100111

Answer

343

Answer

001101000111

Answer

011100100101

Question 4

Convert 5278 to binary.

Accepted Answer

101010111

Answer

011100111

Answer

343

Answer

111010101

Question 5

The base of the hexadecimal system is:

Accepted Answer

sixteen.

Answer

eight.

Answer

ten.

Answer

two.

Question 6

Assign the proper even parity bit to the code 1100001.

Accepted Answer

11100001

Answer

1100001

Answer

01100001

Answer

01110101

Question 7

Which of the following is the primary advantage of using the BCD code instead of straight binary coding?

Accepted Answer

The relative ease of converting to and from decimal.

Answer

Fewer bits are required to represent a decimal number with the BCD code.

Answer

BCD codes are easily converted to hexadecimal codes.

Answer

BCD codes are easily converted to straight binary codes.

Question 8

How many BCD code bits and how many straight binary bits would be required to represent the decimal number 643?

Accepted Answer

12 BCD, 10 binary

Answer

12 BCD, 12 binary

Answer

12 BCD, 9 binary

Answer

16 BCD, 9 binary

Question 9

When using the repeated division by 2 method of converting from decimal to binary, one must write the first remainder as the:

Accepted Answer

LSB

Answer

MSB

Answer

MSB, provided the following sequence of remainders are written in descending order until the final remainder is achieved.

Answer

LSB, provided the final remainder is used to replace the original LSB, which is then moved to the MSB position.