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The LeetCode for VLSI.

Zoi Sandbox for free-form simulation, Zoi Practice for curated units, and Zoi Code for graded challenges.

Zoi SandboxBuild and simulate Verilog modules in a free-form playground.Zoi PracticeSolve curated problems and test your code against hidden cases.Zoi CodeComplete graded challenges and get results from our automated judge.
full_adder.v
OPEN ZOI CODE

Verilog Questions to practice from Top Companies

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module full_adder(
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input a, b, cin,
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output sum, cout
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);
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assign {cout, sum} = a + b + cin;
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endmodule

After Run explore tabs

Build log & simulator prints

OUTPUT

Build succeeded.

Simulator output, errors, and $display lines land here after each run.

Integrated Environment

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Instant Feedback

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Waveform Viewer

Debug your designs with our built-in EPWave-like waveform viewer. Zoom, pan, and analyze signals effortlessly.

Hardware-Focused

Tailored specifically for digital design. Libraries for standard logic gates, flip-flops, and FSMs included.

Problem Library

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