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True of False: A combinational circuit has state.

Given: A 16:1 multiplexer has data inputs D0, D1, …, D15, select inputs S3:0, and output Y.  It is implemented using tristate buffers. What is used to enable the tristate buffer that is connected to D2?

Given: 110001012  is an 8-bit unsigned binary number. What is its value in decimal (ex: “-25”, “45”)

Given: 101101002  is an 8-bit two’s complement number. What is its value in decimal (ex: “-25”, “45”)

A truth table with four output functions is given. Function Y3 will be implemented using a 4:16 decoder that has address inputs A3:0 and outputs Y0, Y1, …, Y15.  Which outputs need to be connected to an OR gate to produce function Y3 (do not confuse function Y3 with output Y3 on the decoder)? 

True of False: A combinational circuit does not have state.

A timing diagram is given for inputs to a D Flip-Flop with Enable (active high). What is the value of the Q output of the D Flip-Flop with Enable at time = 15 ns? Assume the delay from inputs changing to output changing is negligible.

Given the following circuit: What function is implemented by Y2?

Given: 110010012  is an 8-bit two’s complement number. What is its value in decimal (ex: “-25”, “45”)

Given: If you were to put this function into the K-map below, what value would go into the square marked S23?