🔍 Key Concepts

• Differences in symbol shapes between OR, NOR, Exclusive OR (XOR), and AND gates • Meaning of the small circle (inversion bubble) on a gate output • Extra curved input line that distinguishes XOR from a normal OR gate

💭 Think About

• Look closely at whether figure 1 has any small circle on the output and think about what that indicates in logic diagrams • Compare figure 1’s front (input) edge with figure 5 and 6: does it have a single curved line or the double curved line used for a certain special OR-type gate? • Ask yourself which basic gate symbol has the same general body shape as figure 1 but without inversion and without the extra inner curve

✅ Before You Answer

• Verify if there is no inversion bubble on the output of figure 1 • Verify that figure 1 shows only one curved input side, not a double curve • Match that symbol to the standard basic gate names: OR, AND, NOR, Exclusive OR (XOR) before choosing your answer