🔍 Key Concepts
• Positive logic (high = 1, low = 0) and how it affects interpreting input/output levels
• The specific logic gates shown in Figure 3E14 (e.g., AND, OR, NOT, NAND, NOR) and their truth tables
• How the signal flows from the inputs through each gate to produce outputs A, B, and C
💭 Think About
• First, rewrite each input as 1 or 0 using positive logic and note which inputs are high and which are low.
• For each gate in the figure, apply the correct truth table in order from left to right (or input to output) so you can determine the intermediate signals.
• After finding the final logic level (1 or 0) at A, B, and C, translate them back into high/low and compare carefully to each choice.
✅ Before You Answer
• Double‑check that you used positive logic consistently (high = logic 1, low = logic 0).
• Verify that you applied the correct truth table for each gate exactly as drawn in Figure 3E14 (pay attention to any inversion bubbles).
• Confirm that each of A, B, and C matches one and only one of the answer choices; if more than one seems to match, re‑check your gate outputs.