Question

Which of the following circuits are used for interfacing between analog and digital signals? 
A. ALU (Arithmetic Logic Unit)
 B. Instruction pipelining
C. A/D (Analog-to-Digital) converters 
D. D/A (Digital-to-Analog) converters

• A. A, B and C only
• B. B, C and D only
• C. A, C and D only
• D. C and D only

Hint:

ADC + DAC = Analog–Digital interface.

Answer 1

The Correct Option is D

Concept: Interfacing analog and digital systems requires conversion circuits.

Step 1: ADC Converts analog → digital. \[ \Rightarrow C \text{ is correct} \]

Step 2: DAC Converts digital → analog. \[ \Rightarrow D \text{ is correct} \]

Step 3: ALU Performs arithmetic operations → not interfacing. \[ \Rightarrow A \text{ is incorrect} \]

Step 4: Instruction pipelining CPU performance technique → not interfacing. \[ \Rightarrow B \text{ is incorrect} \] \[ \therefore \text{Correct answer is (D)} \]