**NPTEL Digital Circuits Assignment Solutions 2023**

## NPTEL Digital Circuits week 1 Assignment Answers 2023

**1. Which of the following statements is true about analog signals?**

A) Analog signals are discrete in nature.

B) Analog signals have a finite number of possible values.

C) Analog signals can have an infinite number of possible values.

D) Analog signals are represented by binary digits.

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**2. When was the first commercial IC produced from Fairchild semiconductor?**

A) 1958

B) 1691

C) 1961

D) 1978

Answer :-

**3. Which of the following number system is used by computers?**

A) Decimal

B) Binary

C) Octal

D) Hexa-Decimal

Answer :-

**4. If (43) = 3910 then x can be equal to**

A) 9

B) 8

C) 18

D) None of the above

Answer :-

**5. The number 52.68, in base 5 number system is equal to**

A) 202.32

B) 203.22

C) 302.22

D) None of the above

Answer :-

**6. If (78) _{x} = 92_{1}_{0} then x can be equal to**

(A) 12

(B) 14

(C) 9

D) None of the other options

Answer :-

**7. If 92/4 = 23, the base of the number system is**

A) 10

B) 2

C) 8

D) 9

Answer :-

**8. The value of base r, if (121) _{r} = (144)_{8}**

A) 8

B) 4

C) 9

D) None of the above

Answer :-

**9. What is the binary equivalent of the fractional decimal number (27.1875)10?**

A. (11011.1101)2

B. (11011.0011)2

C. (11101.1001)2

D. (11011.0001)2

Answer :-

**10) Sum of (24) _{8} and (74)_{8} is**A) (110)

_{8}

B) (110)

_{8}

C) (123)

_{8}

D) (120)

_{8}

Answer :-

**11. 8-bit 2’s complement form of (-45) _{10} is**

a. 11010010

b. 11010011

c. 10010011

d. 11010001

Answer :-

**12. An hexa decimal to binary conversion can be accomplished by simply replacing each hexa deci–mal symbol by its__________binary equivalent.**

A) 2-bit

B) 3-bit

C) 4-bit

D) 5_bit

Answer :-

**13. Decimal value of the signed magnitude binary format (01110) _{2} is**

A) +14

B) – 14

C) +23

D) -12

Answer :-

**14. Moore’s law states that:**

A) The cost of semiconductor tools doubles every four years

B) The cost of semiconductor tools doubles every two years

C) The number of transistors on a chip double annually

D) The number of transistors on a chip doubles every four years

Answer :-

**15) If (A2D)16 = (X)8, the value of X is**

A) 7054

B) 6054

C) 5055

D) 5054

Answer :-

Course Name | Digital Circuits |

Category | NPTEL Assignment Answer |

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