C++ Functions and Value-Returning Functions Chapter 9 Quiz

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What is the purpose of using functions in C++?

To define variables
To generate random numbers
To print output to the console
To break down large programs into small, manageable sub-tasks (correct)

Which of the following is an example of a built-in function in C++?

sqrt (correct)
generateRandom
programFunction
main

What is the role of the main function in a C++ program?

To break down large programs into sub-tasks
To perform mathematical calculations
To define all user-defined functions
To start the execution of the program (correct)

Why do programmers use function prototypes in C++?

To declare the existence of a function and define its return type and parameters (D) Signup and view all the answers

What does it mean for a variable to have scope and lifetime in C++?

It determines where in the program a variable can be accessed and how long it exists (C) Signup and view all the answers

What is the significance of passing information by value to a function in C++?

It creates a copy of the argument, preventing changes to the original value outside the function (A) Signup and view all the answers

What does the sqrt function do in C++?

It returns a number’s square root as a double (A) Signup and view all the answers

What type of functions are all functions in C++?

Value-returning (D) Signup and view all the answers

Which library contains the definition of the sqrt function in C++?

cmath (D) Signup and view all the answers

What is the purpose of the pow function in C++?

To square a number (D) Signup and view all the answers

What does a value-returning function do in C++?

It performs a task and then returns precisely one value (D) Signup and view all the answers

In which range does the program for generating random addition problems require integers to be generated?

-10 to 10 (D) Signup and view all the answers

What kind of numbers does the sqrt function return in C++?

'0' if input is negative, otherwise a positive number (B) Signup and view all the answers

What is the syntax for using the sqrt function in C++?

$sqrt(x)$ (C) Signup and view all the answers

What does a statement that calls a function do with the return value in C++?

It assigns the return value to a variable (C) Signup and view all the answers

What is the purpose of using functions in C++?

To avoid writing the same code multiple times in a program (B) Signup and view all the answers

Which library contains the definition of the sqrt function in C++?

<cmath> (C) Signup and view all the answers

What type of functions are all functions in C++?

Value-returning functions (A) Signup and view all the answers

What does the sqrt function do in C++?

Finds the square root of a number (B) Signup and view all the answers

What is the significance of passing information by value to a function in C++?

It creates copies of the arguments inside the function (C) Signup and view all the answers

What does a value-returning function do in C++?

Performs a task and then returns precisely one value (D) Signup and view all the answers

What is the purpose of functions in C++?

To break down large programs into small sub-tasks (D) Signup and view all the answers

What does the 'rand' function do in C++?

Produces a sequence of pseudo-random numbers (C) Signup and view all the answers

What is the role of the 'main' function in a C++ program?

To call other functions (A) Signup and view all the answers

Which library contains the definition of the 'sqrt' function in C++?

<math.h> (B) Signup and view all the answers

What type of numbers does the 'rand' function return in C++?

Between 0 and > 32767 (D) Signup and view all the answers

What does a value-returning function do in C++?

Returns a value after computation (D) Signup and view all the answers

What is the syntax for using the 'sqrt' function in C++?

Signup and view all the answers

Why do programmers use function prototypes in C++?

To declare functions before they are used (A) Signup and view all the answers

In which range does the program for generating random addition problems require integers to be generated?

Between 1 and 10 (A) Signup and view all the answers

C++ Functions and Value-Returning Functions Chapter 9 Quiz

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Questions and Answers

What is the purpose of using functions in C++?

Which of the following is an example of a built-in function in C++?

What is the role of the main function in a C++ program?

Why do programmers use function prototypes in C++?

What does it mean for a variable to have scope and lifetime in C++?

What is the significance of passing information by value to a function in C++?

What does the sqrt function do in C++?

What type of functions are all functions in C++?

Which library contains the definition of the sqrt function in C++?

What is the purpose of the pow function in C++?

What does a value-returning function do in C++?

In which range does the program for generating random addition problems require integers to be generated?

What kind of numbers does the sqrt function return in C++?

What is the syntax for using the sqrt function in C++?

What does a statement that calls a function do with the return value in C++?

What is the purpose of using functions in C++?

Which library contains the definition of the sqrt function in C++?

What type of functions are all functions in C++?

What does the sqrt function do in C++?

What is the significance of passing information by value to a function in C++?

What does a value-returning function do in C++?

What is the purpose of functions in C++?

What does the 'rand' function do in C++?

What is the role of the 'main' function in a C++ program?

Which library contains the definition of the 'sqrt' function in C++?

What type of numbers does the 'rand' function return in C++?

What does a value-returning function do in C++?

What is the syntax for using the 'sqrt' function in C++?

Why do programmers use function prototypes in C++?

In which range does the program for generating random addition problems require integers to be generated?

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