1. : What is the primary function of a subtractor in digital circuits?
(A) Adds two binary numbers
(B) Multiplies two binary numbers
(C) Divides two binary numbers
(D) Subtracts one binary number from another
2. : What is the main purpose of an Arithmetic Logic Unit (ALU) in digital systems?
(A) To perform arithmetic and logic operations
(B) To store data temporarily
(C) To generate clock signals
(D) To convert analog signals to digital
3. : Which of the following operations can be performed by an ALU?
(A) Addition
(B) Subtraction
(C) Logic operations (AND, OR, XOR)
(D) All of the above
4. : What is the output of a subtractor if the minuend is 1101 and the subtrahend is 0110?
(A) Difference = 1011
(B) Difference = 0011
(C) Difference = 1001
(D) Difference = 0101
5. : Which gate is commonly used internally in a subtractor?
(A) XOR gate
(B) AND gate
(C) OR gate
(D) NAND gate
6. : What is the primary function of a half subtractor in digital circuits?
(A) Subtracts two binary numbers with borrow
(B) Subtracts two binary numbers without borrow
(C) Subtracts three binary numbers with borrow
(D) Subtracts three binary numbers without borrow
7. : What is the primary function of a full subtractor in digital circuits?
(A) Subtracts two binary numbers with borrow
(B) Subtracts two binary numbers without borrow
(C) Subtracts three binary numbers with borrow
(D) Subtracts three binary numbers without borrow
8. : Which of the following statements about half subtractors is true?
(A) They have two inputs and two outputs.
(B) They have two inputs and one output.
(C) They have three inputs and two outputs.
(D) They have three inputs and one output.
9. : Which of the following statements about full subtractors is true?
(A) They have two inputs and two outputs.
(B) They have two inputs and one output.
(C) They have three inputs and two outputs.
(D) They have three inputs and one output.
10. : Which gate is commonly used internally in a half subtractor?
(A) XOR gate
(B) AND gate
(C) OR gate
(D) NAND gate
11. : Which gates are commonly used internally in a full subtractor?
(A) XOR gate and AND gate
(B) XOR gate and OR gate
(C) AND gate and OR gate
(D) NAND gate and NOR gate
