VHDL Identifiers Quiz

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Questions and Answers

Which characters are identifiers composed of in Verilog?

  • Alphanumeric characters and underscore (correct)
  • Special characters and numbers
  • Only numbers
  • Alphabetic characters only

In Verilog, what must identifiers start with?

  • Any character
  • A number
  • Special character
  • An alphabetic character or an underscore (correct)

What is the purpose of the port list in a Verilog module?

  • Define the interface between the module and its environment (correct)
  • List all the gates used in the module
  • Specify the internal connections within the module
  • End the module description

How are internal connections declared in Verilog?

<p>As wires (A)</p> Signup and view all the answers

What represents the structure of a circuit in Verilog?

<p>(Predefined) primitive gates (A)</p> Signup and view all the answers

How do gate instantiations look in Verilog?

<p>(Optional name), gate output, inputs separated by commas in parentheses (A)</p> Signup and view all the answers

Which keyword in Verilog is used to declare the end of a module?

<p>endmodule (C)</p> Signup and view all the answers

What happens if blank spaces appear within the text of a keyword in Verilog?

<p>The code will generate an error (A)</p> Signup and view all the answers

What is a module in Verilog?

<p>The text enclosed by the keyword pair module...endmodule (C)</p> Signup and view all the answers

Which of the following is not a primitive gate in Verilog?

<p>xor (C)</p> Signup and view all the answers

What are identifiers in Verilog?

<p>Names given to modules, variables, and other elements in the language (D)</p> Signup and view all the answers

In Verilog, what does the keyword 'wire' typically refer to?

<p>A signal that can be driven or read by other modules (A)</p> Signup and view all the answers

What is the purpose of the timescale compiler directive in Verilog?

<p>It specifies the time unit and precision for propagation delays. (D)</p> Signup and view all the answers

In the given Verilog module, which of the following is an input port?

<p>C (D)</p> Signup and view all the answers

Which of the following is a valid gate instantiation in Verilog?

<p>and #(30) G1 (w1, A, B); (C)</p> Signup and view all the answers

What is the purpose of the wire keyword in Verilog?

<p>It specifies an internal connection between gates. (D)</p> Signup and view all the answers

Which of the following is a valid identifier in Verilog?

<p>gate_instance (B)</p> Signup and view all the answers

What is the purpose of a test bench in Verilog?

<p>It provides stimulus to the design and checks the outputs. (C)</p> Signup and view all the answers

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