Quiz for Return values and arguments

Q1: Which keyword is used to return a value from a function in C?

A. return B. break C. goto D. continue

Q2: What is the return type of a function that does not return a value?

A. int B. void C. float D. char

Q3: How many values can a C function return directly?

A. Only one B. Two C. Unlimited D. None

Q4: Which of the following passes a copy of the argument to a function?

A. Pass by value B. Pass by reference C. Global variables D. None

Q5: When passing by reference, changes made to the parameter:

A. Affect the original variable B. Do not affect the original variable C. Create a copy D. Cause compilation error

Q6: Which of the following is not a valid return type in C?

A. int B. struct C. array D. float

Q7: If a function has return type int but no return statement, it returns:

A. 0 B. Garbage value C. NULL D. Compilation error

Q8: Which function type allows returning a pointer?

A. Any type B. void C. Pointer type D. Static

Q9: Which argument passing method is default in C?

A. Pass by value B. Pass by reference C. Pointer D. Global variable

Q10: A return statement without expression is valid in:

A. int function B. void function C. float function D. double function

Q11: Which of these can be used to return multiple values from a function?

A. Pointers B. Return keyword twice C. Arrays D. Structures

Q12: Returning a local variable's address from a function is:

A. Safe B. Undefined behavior C. Efficient D. Recommended

Q13: What will be the return type of main() in standard C?

A. void B. int C. char D. double

Q14: A function call inside another function's return statement is called:

A. Nested call B. Return chaining C. Inline call D. Function overriding

Q15: What happens if return type and returned value type mismatch?

A. Automatic type conversion B. Runtime error C. Compilation error D. Undefined behavior

Q16: Which of these returns control to the calling function?

A. break B. continue C. return D. exit()

Q17: Arguments inside a function header are called:

A. Actual parameters B. Formal parameters C. Constant parameters D. Global variables

Q18: Values passed in the function call are called:

A. Formal parameters B. Actual parameters C. Local variables D. Global variables

Q19: Which keyword ends the execution of a function immediately?

A. break B. continue C. return D. stop

Q20: To return a character from a function, use return type:

A. char B. int C. string D. void