This set of Digital Electronics/Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Number System – 1”.

1. Any signed negative binary number is recognised by its

a) MSB

b) LSB

c) Bits

d) Nibble

View Answer

Explanation: Any negative number is recognized by its MSB(Most Significant Bit).

2. The parameter through which 16 distinct values can be represented is known as:

a) Bit

b) Byte

c) Nibble

d) Word

View Answer

Explanation: It can be represented up to 16 different values with the help of Nibble. Though, Nibble is a combination of four bits and it takes four bits to represent a single BCD or hexadecimal digit.

3. If the decimal number is a fraction then its binary equivalent is obtained by ________ the number continuously by 2.

a) Dividing

b) Multiplying

c) Adding

d) Subtracting

View Answer

Explanation: On multiplying the decimal number continuously by 2, the binary equivalent is obtained.

4. The representation of octal number (532.2)8 in decimal is :

a) (346.25)10

b) (532.864)10

c) (340.67)10

d) (531.668)10

View Answer

Explanation: (532.2)8 = 5 * 8

^{2}+ 3 * 8

^{1}+ 2 * 8

^{0}+ 2 * 8

^{-1}= (346.25)10

5. The decimal equivalent of the binary number (1011.011)2 is

a) (11.375)10

b) (10.123)10

c) (11.175)10

d) (9.23)10

View Answer

Explanation: 1 * 2

^{3}+ 0 * 2

^{2}+ 1 * 2

^{1}+1*2

^{0}+ 0 * 2

^{-1}+1 * 2

^{-2}+ 1 * 2

^{-3}= (11.375)10

Hence, (1011.011)2 = (11.375)10

6. An important drawback of binary system is

a) It requires very large string of 1’s and 0’s to represent a decimal number

b) It requires sparingly small string of 1’s and 0’s to represent a decimal number

c) It requires large string of 1’s and small string of 0’s to represent a decimal number

d) None of the Mentioned

View Answer

Explanation: The most vital drawback of binary system is that it requires very large string of 1’s and 0’s to represent a decimal number.

7. The decimal equivalent of the octal number (645)8 is ______

a) (450)10

b) (451)10

c) (421)10

d) (501)10

View Answer

Explanation: The decimal equivalent of the octal number (645)8 is 6 *

8

^{2}+ 4 * 8

^{1}+ 5 * 8

^{0}= (421)10.

8. The largest two digit hexadecimal number is _____

a) (FE)16

b) (FD)16

c) (FF)16

d) (EF)16

View Answer

Explanation: The largest two digit hexadecimal number is (FF)16.

9. Representation of hexadecimal number (6DE)H in decimal :

a) 6 * 16^{2} + 13 * 16^{1} + 14 * 16^{0}

b) 6 * 16^{2} + 12 * 16^{1} + 13 * 16^{0}

c) 6 * 16^{2} + 11 * 16^{1} + 14 * 16^{0}

d) 6 * 16^{2} + 14 * 16^{1} + 15 * 16^{0}

View Answer

Explanation: In hexadecimal number D & E represents 13 & 14 respectively.

So, 6DE = 6 * 16

^{2}+ 13 * 16

^{1}+ 14 * 16

^{0}.

10. The quantity of double word is

a) 16 bits

b) 32 bits

c) 64 bits

d) 8 bits

View Answer

Explanation: The quantity of double word is 32 bits.

**Sanfoundry Global Education & Learning Series – Digital Circuits.**

To practice all areas of Digital Circuits, __here is complete set of 1000+ Multiple Choice Questions and Answers__.