PPL FIneL

Question 1

What is a function in C++?
A. A block of code that performs a specific task.
B. A data type for storing values.
C. A mechanism for memory allocation.
D. A library included in the program.

Answer 1

A block of code that performs a specific task.

Question 2

What are the main components of a C++ function definition?
A. Function name, return type, parameters, and body.
B. Function name and the main() function.
C. Header files and variable declarations.
D. Only return type and parameters.

Answer 2

Function name, return type, parameters, and body.

Question 3

What does the void keyword indicate in a function definition?
A. The function will always return an integer.
B. The function does not return a value.
C. The function must accept no arguments.
D. The function is predefined in the C++ library.

Answer 3

The function does not return a value.

Question 4

When is a declared function executed?
A. As soon as the program starts.
B. Only after the function is called.
C. During the program compilation.
D. After the program terminates.

Answer 4

Only after the function is called.

Question 5

What happens if a function is declared after the main() function?
A. It will execute before main().
B. An error will occur.
C. The program will ignore it.
D. The function will work normally.

Answer 5

An error will occur.

Question 6

What is the term for a variable passed to a function?
A. Parameter
B. Argument
C. Constant
D. Pointer

Answer 6

Argument

Question 7

Which keyword is used to return a value from a function?
A. return
B. void
C. break
D. exit

Answer 7

return

Question 8

What is the correct syntax to call a function named myFunction with no parameters?
A. myFunction;
B. myFunction[];
C. myFunction();
D. call myFunction();

Answer 8

myFunction();

Question 9

What must match between the function declaration and the function call when passing multiple parameters?
A. Only the number of parameters.
B. The order of parameters.
C. Both the number and order of parameters.
D. Neither number nor order of parameters.

Answer 9

Both the number and order of parameters.

Question 10

How can a function’s result be stored?
A. It cannot be stored.
B. By assigning it to a variable.
C. By calling it without any arguments.
D. By declaring it as void.

Answer 10

By assigning it to a variable.

Question 11

What is a predefined function in C++?
A. A function created by the user.
B. A function that is already defined in the C++ library.
C. A function without a return value.
D. A function that only operates on arrays.

Answer 11

A function that is already defined in the C++ library.

Question 12

Which of the following is a valid function declaration in C++?
A. int myFunction();
B. void myFunction(int x, int y);
C. double calculateArea(double radius);
D. All of the above.

Answer 12

All of the above.

Question 13

What is the primary purpose of functions in C++?
A. To reduce code duplication.
B. To increase the complexity of code.
C. To make code run faster.
D. To manage memory allocation.

Answer 13

To reduce code duplication.

Question 14

What keyword is used to declare a function that does not return any value?
A. null
B. void
C. empty
D. none

Answer 14

void

Question 15

In the function int add(int a, int b), what are a and b?
A. Arguments
B. Parameters
C. Local variables
D. Global variables

Answer 15

Parameters

Question 16

Which of these statements about function overloading is true?
A. Functions cannot have the same name.
B. Overloaded functions must have different numbers or types of parameters.
C. Overloading functions is not allowed in C++.
D. Overloaded functions must always return void.

Answer 16

Overloaded functions must have different numbers or types of parameters.

Question 17

What is the difference between a function declaration and a function definition?
A. A declaration specifies the return type, name, and parameters; a definition includes the body.
B. A declaration only includes the return type; a definition includes the name and parameters.
C. There is no difference between them.
D. A declaration must come after the definition.

Answer 17

A declaration specifies the return type, name, and parameters; a definition includes the body.

Question 18

What happens if a return statement is missing in a non-void function?
A. A runtime error occurs.
B. The function returns an undefined value.
C. The program crashes.
D. The function automatically returns 0.

Answer 18

The function returns an undefined value.

Question 19

Which of the following is a valid function call for void printName(string name)?
A. printName[“Alice”];
B. printName(“Alice”);
C. printName{“Alice”};
D. printName<“Alice”>;

Answer 19

printName(“Alice”);

Question 20

What will be the output of the following code?

cpp
Copy code
void greet() {
cout &laquo_space;“Hello!”;
}
int main() {
greet();
return 0;
}
A. The program will print “Hello!”
B. The program will throw an error.
C. The program will do nothing.
D. The program will print nothing.

Answer 20

The program will print “Hello!”

Question 21

Can a function be called from within another function in C++?
A. Yes, this is called recursion.
B. No, functions must be independent.
C. Only if the function is defined after main().
D. Only if the function returns void.

Answer 21

Yes, this is called recursion.

Question 22

What is the purpose of function parameters?
A. To define the return type of a function.
B. To pass data into the function.
C. To store the function’s result.
D. To execute a function automatically.

Answer 22

To pass data into the function.

Question 23

What is an inline function in C++?
A. A function defined inside a class.
B. A function that is optimized by the compiler to reduce function call overhead.
C. A function that can only be used once.
D. A function declared without parameters.

Answer 23

A function that is optimized by the compiler to reduce function call overhead.

Question 24

Which of the following is an example of a function returning a value?
A. int sum(int x, int y) { return x + y; }
B. void display() { cout &laquo_space;“Hello”; }
C. string greet() { cout &laquo_space;“Hi”; }
D. void main() { }

Answer 24

int sum(int x, int y) { return x + y; }

Question 25

In the following code, what is max?

cpp
Copy code
int max(int x, int y) {
return (x > y) ? x : y;
}
A. A keyword in C++.
B. A user-defined function.
C. A predefined function.
D. An inline operator.

Answer 25

A user-defined function.

Question 26

Which of the following statements is true about arguments?
A. Arguments are passed when a function is called.
B. Arguments must always match the parameters by name.
C. Arguments and parameters are completely unrelated.
D. Arguments are only used in void functions.

Answer 26

Arguments are passed when a function is called.

Question 27

How many return statements can a function have?
A. One
B. Multiple
C. None
D. Unlimited, but only the first one is executed.

Answer 27

Multiple

Question 28

What happens if a function is not called in a program?
A. It will still execute.
B. It will be ignored by the compiler.
C. It will cause a runtime error.
D. It will crash the program.

Answer 28

It will be ignored by the compiler.