C Arrays

Arrays are structures that hold multiple variables of the _____________ data type

• int data type

• char data type

• same data type

• different data type

The first element in the array is by default numbered (index)

_____

• -1

• 0

• 1

• anything by the programmer

Before using an array its type and dimension must be declared?

• True

• False

int marks[30]; What the number 30 tells us

• int data type size

• number of elements in marks array

• maximum value, that can stored in marks

• None

Which one is correct syntax for accessing value of 2nd element of an array

• int value = marks[1];

• int value = marks[2];

• int value = marks(1);

• int value = marks(2)

Which one is correct syntax for entering 30 at 10th position of an array?

• marks[10]=30

• marks[9]=29

• marks[9]=30

• marks[10]=29

Predict output of following program

int main(){

int i;

int arr[5] = {1};

for (i = 0; i < 5; i++)

printf("%d ", arr[i]);

return 0;

}

• 1 1 1 1 1

• 1 followed by 4 junk values

• 1 0 0 0 0

• Compiler error

What is the output of the following program?

int main()

{

int i; int arr[5] = {0};

for (i = 0; i <= 5; i++)

printf("%d ", arr[i]);

return 0;

}

• Compiler error : Array index out of bound

• Prints 0 five times followed by garbage value

• Program will crash

• The program may print 0 five times followed by garbage value, or may crash if address (arr+5) is invalid

What will be the output of the following code if array elements are: 5, 8, 9, 6, 1, 7, 2?

for(i=0, j=6; i<=(7/2) ; i++, j-- )

print(" %d - %d", array[i], array[j] )

• 5 8 9 6 - 2 7 1 6

• 5 8 9 6 -

  6 1 7 2

• Error

• 5 - 2

  8 - 7

  9 - 1

  6 - 6

What will be the output of:

int a[] = { 5, 4, 3, 2, 1};

int i;

for(i=0; i>=3; i++)

printf("%d \n", a[ i ] );

• 5 4 3 2 1 - one in each line

• 5 4 3 2 - one in each line

• No output

• Never ending loop