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# Digital Logic - Combinational Circuits

66:

An example of a universal building block is:

 A. EX-OR gate B. AND gate C. OR gate D. NOR gate Answer Report Discuss Option: D Explanation : Click on Discuss to view users comments. Write your comments here:
67:

The dual ofthe switching function x + yz is:

 A. x+yz B. x̄ + ȳz̄ C. x(y+z) D. x̄(ȳ + z̄) Answer Report Discuss Option: C Explanation : Click on Discuss to view users comments. mahmoud said: (7:56am on Thursday 5th April 2018) why answer isn't D?! Write your comments here:
68:

The characteristic equation of D flip-flop is:

 A. Q = 1 B. Q = 0 C. Q = D̄ D. Q= D Answer Report Discuss Option: D Explanation : Click on Discuss to view users comments. Write your comments here:
69:

If four 4 input multiplexers drive a 4 input multiplexer, we get a:

 A. 16 input MUX B. 8 input MUX C. 4 input MUX D. 2 input MUX Answer Report Discuss Option: A Explanation : Click on Discuss to view users comments. Write your comments here:

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