Tu Sic Medum VI. SKILLS TESTING: 1. What is a logic gate? (0.5 mark) 2. What does the small circle in the logic gate such as NOT, NAND NOR and XNOR signify?(05 mark) 3. How could you identify if the IC is a TTL or CMOS? (1 mark) 4. Draw the equivalent circuit of the NOR gate using OR-NOT gates. (1 mark)