C Arrays Quiz

Which of the following correctly declares an array of 10 integers in C?

• int arr;

• array arr;

• int arr;

• int arr[];

What is the index of the first element in a C array?

• 0

• 1

• -1

• n (array size)

How do you initialize all elements of an integer array arr to zero?

• int arr = {0};

• int arr = (0,0,0,0,0);

• int arr;

• int arr; arr=0;

What will happen if you access arr in an array declared as int arr;?

• It will access last element

• Compile-time error

• Unpredictable (undefined behavior)

• Produces zero output

Which of these accesses the fifth element in the array arr?

• arr

• arr(5)

• arr{5}

• arr

What is the output of the following code? c int arr[4] = {1,2,3,4}; printf("%d", arr[2]);

• 2

• 3

• 4

• 1

If you declare int arr = {5}; what are the values in arr?

• 5, 5, 5

• 0, 0, 0

• 5, 0, 0

• All garbage values

Which header file is needed for printf when working with arrays?

• stdio.h

• stdlib.h

• array.h

• conio.h

What is the maximum valid index for int arr;?

• 100

• 99

• 101

• 1

Which for loop will traverse an array of n elements?

• for(i=0;i

• for(i=1;i<=n;i++)

• for(i=1;i

• for(i=0;i<=n;i++)