Gates and Logic Dr John Cowell phones off (please)

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Presentation transcript:

Gates and Logic Dr John Cowell phones off (please)

Q 1 what is the difference between a combinational logic circuit and a sequential logic circuit? a) A combinational logic circuit is a set of sequential circuits b) Sequential circuits use feedback. c) In a combinational circuit the same set of inputs may give different output d) Combinational logic circuits are composed of AND and OR gates only e) Sequential circuits are always simpler than combinational circuits. CSCI1412-HW-42

Q2 What gate has this truth table ? a) AND b) OR c) XOR d) NAND e) NOT CSCI1412-HW-43

Q3 NAND gates may be used to simulate any other gate. What single gate does this circuit correspond to? a) AND b) OR c) XOR d) NAND e) NOT CSCI1412-HW-44

Q4 What is the result of the logical operation 1010 * 1100 ? a) 1001 b) 1110 c) d) e) 1000 CSCI1412-HW-45

Answers: Q1 – B Sequential circuits use feedback Q2 – C XOR gate Q3 – E NOT gate Q4 – E (Logical AND) CSCI1412-HW-46