Midterms

Question 1

group of statements that together perform a task

Answer 1

function

Question 2

tells the compiler about a function’s name, return type, and parameters

Answer 2

function

Question 3

already present inside the header file, included at the beginning of a program

Answer 3

library functions

Question 4

we have tow write a body of a function and call the function when required

Answer 4

user-defined functions

Question 5

why we need functions in c++

Answer 5

• errors are easy to track
• reduces size of code
  -replacing duplicate statements with function calls
• reusability of code
• improves code readability

Question 6

various forms of the main method

Answer 6

main()
main (void)
void main()
void main (void)
int main (int argc, charargv[])
void main(int argc, charargv[])

Question 7

main method that does not return any value should have the return type?

Answer 7

void

Question 8

main method that returns a value should have the return type?

Answer 8

int

Question 9

also called function prototype. specifies the name of a function to be used in the program like a variable declaration

Answer 9

function declaration

Question 10

syntax of function declaration

Answer 10

return_data_type function_name (data type arguments);

Question 11

means writing the body of a function, consisting of statements that perform specific tasks

Answer 11

function definition

Question 12

invoking a function also means

Answer 12

calling a function/function call

Question 13

two methods to call a function

Answer 13

1. call by value
2. call by reference

Question 14

copies the actual value of an argument into the formal parameter of the function

Answer 14

call by value

Question 15

function that is expanded in line when it is invoked thus saving time

Answer 15

inline function

Question 16

Makes program execution faster because it saves the function location into the compile time

Answer 16

Inline function

Question 17

this is accessible by all the private and protected members of the class

Answer 17

friend function

Question 18

true or false: a friend function cannot be called using the object of the class as it is not in the scope of the class

Answer 18

true

Question 19

declares members that are not bound to class instances; shared by all objects of the class

Answer 19

static data members

Question 21

why return 0?

Answer 21

• represents the status of the program
• a zero value indicates that the program is successful and a non-zero value indicates a problem in the program
• the program execution will reach the return zero statement if the above statements executed successfully

Question 22

describe int main

Answer 22

int main is a declaration defining the main function. it returns an integer value to the operating system. the return value can be used to indicate the success or failure of the program (with 0 typically indicating success), which can be useful for debugging code.

Question 23

what is a main function?

Answer 23

main functions are the entry point of any program or the function that is called when the program is first launched.

Question 24

what is void main ()

Answer 24

void main() is a declaration of the main function that doesn’t return any value to the operating system. it is used when one doesn’t want to return any value to the main function. however, this is not the standard main method for programming; it is not recommended for use.

Question 25

what is int main (int argc, char**argv)?

Answer 25

this is also a main method that returns an integer value but takes two parameters: argc and argv. this is used for command-line prompting. the argc parameter represents the number of command-line arguments passed to the program, including the name of the program itself. meanwhile, argv, is an array of character pointers representing the actual command-line arguments.

Question 26

which main methods are standard-compliant?

Answer 26

int main() and int main (int argc, char argv[]) void main is not

Question 27

this is the ability to take more than one form

Answer 27

polymorphism

Question 28

this allows objects to have different internal structure to share the same external interface

Answer 28

polymorphism

Question 29

the number and type of arguments that a function may take is defined in the function itself

Answer 29

function overloading

Question 30

true or false: a function may take zero or more arguments when called

Answer 30

treu

Question 31

this is the function without its body

Answer 31

prototype of a function

Question 32

this declares the return type of the function that declares the number, the types and order of parameters the function expects to receive

Answer 32

function prototype