Virtual Labs

What is the purpose of the 'case' statement in Verilog MUX implementation?

a: To define the input conditions for each data input. Explanation

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b: To declare the module and its input/output ports. Explanation

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c: To specify the behavior for each control signal combination. Explanation

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d: To optimize the MUX circuit for reduced area and power consumption. Explanation

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Which Verilog code snippet correctly implements a 2-to-1 MUX with inputs 'A', 'B', and control signal 'S'?

a: assign Y = S ? B : A; Explanation

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b: assign Y = S ? A : B; Explanation

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c: assign Y = (S == 2) ? A : B; Explanation

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d: assign Y = (S == 2) ? A : B; Explanation

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Which Verilog code snippet creates a 4-to-1 MUX with inputs 'A', 'B', 'C', 'D', and control signals 'S1' and 'S0'?

a: always @(S1 or S0) begin Y = (S1 & S0) ? A : (S1 & ~S0) ? B : (~S1 & S0) ? C : D; end Explanation

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b: always @(S1 or S0) begin Y = (S1 & ~S0) ? A : (S1 & S0) ? B : (~S1 & S0) ? C : D; end Explanation

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c: always @(S1 or S0) begin Y = (S1 & S0) ? A : (S1 & ~S0) ? D : (~S1 & S0) ? C : B; end Explanation

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d: always @(S1 or S0) begin Y = (S1 & S0) ? A : (S1 & ~S0) ? B : (S0 & ~S1) ? C : D; end Explanation

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What is the advantage of using a MUX-based design over other logic circuits?

a: Lower power consumption Explanation

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b: Higher clock frequency Explanation

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c: Lower area utilization Explanation

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d: Faster propagation delay Explanation

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In Verilog, which data type is commonly used for MUX inputs?

a: reg Explanation

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b: integer Explanation

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c: wire Explanation

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d: parameter Explanation

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Which Verilog code snippet correctly defines a 2-to-1 MUX with a default output 'X'?

a: module mux2to1(input A, input B, input S, output Y); assign Y = (S == 0) ? A : B; default: Y = X; endmodule Explanation

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b: module mux2to1(input A, input B, input S, output Y); assign Y = (S == 1) ? A : B; else Y = X; endmodule Explanation

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c: module mux2to1(input A, input B, input S, output Y); assign Y = (S == 1) ? A : B; ifnone Y = X; endmodule Explanation

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d: module mux2to1(input A, input B, input S, output Y); assign Y = (S == 1) ? A : B; default: Y <= X; endmodule Explanation

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Design of a Multiplexer using Verilog