Question

Sequential circuits differ from combinational circuits because they

• A. Do not use logic gates
• B. Use only AND gates
• C. Are faster
• D. Have memory elements

Hint:

\[ \boxed{ \begin{aligned} \text{Combinational circuits} &\rightarrow \text{No memory} \text{Sequential circuits} &\rightarrow \text{Memory elements} \end{aligned} } \]

Answer 1

The Correct Option is D

Step 1: Recall the characteristics of combinational circuits. Combinational circuits depend only on the present inputs. They do not store previous information.

Step 2: Recall the characteristics of sequential circuits. Sequential circuits contain memory elements such as flip-flops. Therefore, their outputs depend on - present inputs, and - previous states. Hence, \[ \boxed{\text{Sequential circuits have memory elements}.} \] Therefore, \[ \boxed{(D)} \] is the correct answer.