Number Systems and Codes MCQs

Question 1

Base 10 refers to which number system?

Accepted Answer

decimal

Answer

binary coded decimal

Answer

octal

Answer

hexadecimal

Question 2

Convert the decimal number 151.75 to binary.

Accepted Answer

10010111.11

Answer

10000111.11

Answer

11010011.01

Answer

00111100.00

Question 3

Convert the binary number 1011010 to hexadecimal.

Accepted Answer

5A

Answer

5B

Answer

5F

Answer

5C

Question 4

The number of bits used to store a BCD digit is:

Accepted Answer

4

Answer

8

Answer

1

Answer

2

Question 5

Sample-and-hold circuits in ADCs are designed to:

Accepted Answer

stabilize the input analog signal during the conversion process

Answer

sample and hold the output of the binary counter during the conversion process

Answer

stabilize the ADCs threshold voltage during the conversion process

Answer

sample and hold the ADC staircase waveform during the conversion process

Question 6

The weight of the LSB as a binary number is:

Accepted Answer

1

Answer

2

Answer

3

Answer

4

Question 7

What is the difference between binary coding and binary coded decimal?

Accepted Answer

Binary coding is pure binary.

Answer

BCD is pure binary.

Answer

Binary coding has a decimal format.

Answer

BCD has no decimal format.

Question 8

Convert the binary number 1001.0010 to decimal.

Accepted Answer

9.125

Answer

125

Answer

12.5

Answer

90.125

Question 9

Convert 11001001 2 (binary) to decimal.

Accepted Answer

201

Answer

2001

Answer

20

Answer

210