Functions in Programming

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Questions and Answers

What is the main advantage of breaking down code into small functions?

  • Enhancing the program's execution speed
  • Increasing the program's memory consumption
  • Making the program more modular (correct)
  • Reducing the compile time

Which of the following is NOT an advantage of using functions in programming?

  • Easier debugging
  • Simplified code maintenance
  • Improved code readability
  • Reduced reusability (correct)

What is the purpose of a function prototype in programming?

  • To specify the return type and parameter types of a function (correct)
  • To define the function's working directory
  • To initialize function arguments
  • To declare variables within a function

In a function header, how are multiple arguments separated?

<p>With commas (A)</p> Signup and view all the answers

What does 'void' indicate in a function definition?

<p>It specifies that the function returns no value (A)</p> Signup and view all the answers

Why is it important to declare a function before using it in a program?

<p>To avoid errors related to undefined functions (B)</p> Signup and view all the answers

What does a function prototype for 'double sqrt(double);' tell the compiler?

<p>The function returns a double and takes a double argument (D)</p> Signup and view all the answers

What is the purpose of placing function prototypes at the top of the program or in a separate header file?

<p>To define the function before they are used (C)</p> Signup and view all the answers

In the context of scope rules for functions, what happens to variables defined within a function?

<p>They are local to that function only (C)</p> Signup and view all the answers

How can variables be passed to a function within a C program?

<p>Only as parameters (D)</p> Signup and view all the answers

What happens when a return statement is encountered in a C function?

<p>The function is terminated and the result is passed to the calling function (A)</p> Signup and view all the answers

Why are variable names optional in the argument list of a function declaration?

<p>To simplify the code for programmers (B)</p> Signup and view all the answers

What happens if all functions in a C program are defined before they are used?

<p>&quot;No prototypes are needed&quot; (B)</p> Signup and view all the answers

In C function calls, how are expressions in the parameter list evaluated?

<p>&quot;In no particular order&quot; (C)</p> Signup and view all the answers

"What is the only way to pass (a single) variable back to the calling function from a C function?"

<p>&quot;Via the return statement&quot; (A)</p> Signup and view all the answers

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