Question

The combinations of the NAND gates shown hereunder are equivalent to

• A. an OR gate and an AND gate respectively
• B. an AND gate and a NOT gate respectively
• C. an AND gate and OR gate respectively
• D. an OR gate and an NOT gate respectively

Answer 1

Answer: (A)

an OR gate and an AND gate respectively

Truth tables for logic (1) and (2) are shown below:

Input	Output
$(0,0)$	$0$
$(1,0)$	$1$
$(0,1)$	$1$
$(1,1)$	$1$

Input	Output
$(0,0)$	$0$
$(1,0)$	$0$
$(0,1)$	$0$
$(1,1)$	$1$

The truth tables are equivalent to OR and AND gate.