Which combination of logic gates is universally known as a 'Universal Gate' because it can be used to construct any other basic logic gate (AND, OR, NOT)? MCQ with Answer and Explanation
Which combination of logic gates is universally known as a 'Universal Gate' because it can be used to construct any other basic logic gate (AND, OR, NOT)?
A. AND and OR
B. NAND and NOR
C. NOT and AND
D. XOR and XNOR
Answer: Option B
Solution (By JKSSB Mock Tests)
NAND (NOT-AND) and NOR (NOT-OR) gates are called Universal Gates in digital electronics. By cleverly combining multiple NAND gates (or multiple NOR gates) together, one can perfectly replicate the logical function of any basic gate (NOT, AND, OR) without needing the actual basic gates themselves.
One Parsec is a unit of astronomical distance. It is defined as the distance at which a radius of one astronomical unit (AU) subtends an angle of one second of arc. One parsec is approximately equal to:
Explanation:
The parsec (parallax second) is the largest standard unit of distance used in astronomy. 1 Astronomical Unit (AU) is approx 1.5 x 10^11 m. 1 Light Year (ly) is approx 9.46 x 10^15 m. 1 Parsec is approximately 3.08 x 10^16 m. Converting parsecs to light years: (3.08 x 10^16) / (9.46 x 10^15) ≈ 3.26 light years.
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