Chapter 2 LOGIC GATES MCQs

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1. . When the input to an inverter is LOW (0), the output is





2. . An inverter performs an operation known as





3. . Logical expression for NOT gate is:





4. . Logical expression for AND gate is:





5. . The output of an OR gate with inputs A, B and C is 0 (LOW) when





6. . Logical expression for OR gate is:





7. . A pulse is applied to each input of a 2-input NAND gate. One pulse goes HIGH at t = 0 and goes back LOW at t = 1 ms. The other pulse goes HIGH at t = 0.8 ms and goes back LOW at t = 3 ms. The output pulse can be described as follows:





8. . A pulse is applied to each input of a 2-input NOR gate. The other pulse goes HIGH at t = 0.8 ms and goes back LOW at t = 3 ms. The output pulse can be described as follows:





9. . Logical expression for NOR gate is:





10. . A pulse is applied to each input of an exclusive-OR gate. One pulse goes HIGH at t = 0 and goes back LOW at t = 1 ms. The other pulse goes HIGH at t = 0.8 ms and goes back LOW at t = 3 ms. The output pulse can be described as follows:





11. . Logical expression for exclusive OR gate is:





12. . Logical expression for exclusive NOR gate is:





13. . TTL stands for:





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