Which of the following keywords marks the beginning of the function block?

1. func
2. define
3. def
4. function

What is the area of memory called, which stores the parameters and local variables of a function call ?

1. a heap
2. storage area
3. a stack
4. an array

Find the errors in following function definitions :

1.

    def main()  
        print ("hello")
    

2.

   def func2():  
        print(2 + 3)
    

3.

   def compute():   
        print (x * x)
    

4.

   square (a)  
        return a * a  
   

What is the default return value for a function that does not return any value explicitly ?

1. None
2. int
3. double
4. null