Question

1. Which is correct?

		Arrays in C++ may have several different types stored in them.
		To call a function with an array parameter, write the array argument as the array name followed by empty square brackets, as in f(a[], 7); (The first argument is an array a, the second is the size.)
		C++ arrays check for out-of-range index values.
		Consider the array declaration, int x[20];. There is no memory allocated for x[20].

Answer 1

OPTION D is correct.

Explanation:

1. Array means "the collection of homogeneous data".
   • Homogeneous data means all the data should be of same type
   • Example:
     • integer array is declared as:
       • int arr[10].
       • In arr, we can only store the integers.
       • If we try to store another data type like double or float, we will get ERROR
     • double array is declared as:
       • double a[10]
   • Hence, the option is wrong.
2. We will pass the array name but not the brackets.
   • Example:
     • Let's say we have a function fun(int array[], int size)
     • If we want to call that function, we should call it like fun(a,7) but not fun(a[ ], 7 ).
   • Hence, it's wrong
3. C++ will not check for any index out of bounds errors
   • If we try to access the values out of the range, we will get a garbage value.
   • Hence, it's wrong.
4. THIS IS CORRECT
   • The memory will only be allocated when we store the data
   • The memory will not be allocated when we just declate the array like int x[20].
   • Hence, this option is CORRCET.

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