Global Variables in Programming
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Questions and Answers

Which of the following is NOT a characteristic of global variables?

  • Can only be initialized at the time of declaration (correct)
  • Visible to all functions in the program
  • Created when the program starts
  • Can be accessed from any function within the program

    • What is a potential issue associated with overusing global variables?

  • Improved isolation for testing
  • Easier debugging
  • Enhanced program understanding
  • Dependency issues (correct)

    • When are global variables destroyed in a program?

  • When they are not being used
  • When the function they are declared in ends
  • When the program terminates (correct)
  • When the program starts

    • What makes global variables convenient for sharing data in a program?

    <p>Visibility to all functions in the program (B)</p> Signup and view all the answers

    Why can overuse of global variables make programs harder to debug?

    <p>They can lead to dependency issues and any function can modify them (B)</p> Signup and view all the answers

    What are the four variables in a two-port network?

    <p>hi1, hi2, V1, V2</p> Signup and view all the answers

    How can the relationships between V1, V2, i1, and i2 in a two-port network be expressed?

    <p>V1 = z11<em>i1 + z12</em>i2 and V2 = z21<em>i1 + z22</em>i2</p> Signup and view all the answers

    What is the impedance matrix in the context of a two-port network?

    <p>[z11 z12; z21 z22]</p> Signup and view all the answers

    Define Z11 in a two-port network.

    <p>Input impedance of port 1 when port 2 is open-circuited</p> Signup and view all the answers

    Explain Z21 in the context of a two-port network.

    <p>Forward transfer impedance from port 1 to port 2</p> Signup and view all the answers

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