Programming and Data Structures MCQ - Arrays

16 If storage class is missing in the array definition, by default it will be taken to be

A
automatic
B
external
C
static
D
either automatic or external depending on the place of occurrence

View Explanation
Comment

If it is coming within a function, the storage class will be taken to be automatic. otherwise external

17 Consider the array definition
int num [10] = {3, 3, 3};
Pick the Correct answers

A
num [9] is the last element of the array num
B
The value of num [8] is 3
C
The value of num [3] is 3
D
None of the above

View Explanation
Comment

18 Consider the following type definition.
typedef char x[10];
x myArray[5];
What will sizeof(myArray) be? (Assume one character occupies 1 byte)

A
15 bytes
B
10 bytes
C
50 bytes
D
30 bytes

View Explanation
Comment

19 While passing an array as an actual argument, the function call must have the array name

A
with empty brackets
B
with its size
C
alone
D
none of the above

View Explanation
Comment

20 The following program
main( )
{
static int a[ ] = { 7, 8, 9 } ;
printf( "%d", 2[ a ] + a[ 2 ] ) ;
}

A
results in bus error
B
results in segmentation violation error
C
will not compile successfully
D
none of the above

View Explanation
Comment

a[2] will be converted to *(a + 2).
*(a + 2) can as well be written as *(2 + a ) .
*(2 + a ) is nothing but 2 [a] .
a [2] is essentially same as 2 [a] which is same as * ( 2 + a ).
So, it prints 9 + 9 = 18. Some of the modem compilers don't accept 2[a].