AP Computer Science A Quiz

_________________ is a collection of elements used to store the same type of data.

• Array
• Switch
• Case
• Loop

For the array:
float stats[3];
What is the range of the index?

• 0 to 3
• 0 to 2
• 1 to 3
• 0 to 4

int nums[ ] =
{2, 3, 5, 8, 9, 11};
How would you access the fourth element in nums

• nums[4]
• nums[3]
• nums(4)
• nums(3)

for(int i=0; i<10; i++)
           numbers[i] = 2 * i + 1;
// Which index of the array holds the value of 5?

• 1
• 2
• 3
• 4

Examine the following:
int items[ ][ ] = 
{ {0,1,3,4} , {4,3,99,0,7} , {3,2} } ;
Which of the following statements replaces the 99 with 77?

• items[1][2] = 77;
• items[2][1] = 77;
• items[ 99 ] = 77;
• items[2][3] = 77;

Examine the following:
float values[ ][ ] = 
{ {1.2, 9.0, 3.2},  
               {9.2, 0.5, 1.5, -1.2},  
      {7.3, 7.9, 4.8} } ;
what is in values[3][0]?

• 7.3
• 7.9
• 9.2
• There is no such array element.

 Which of the following is a two-dimensional array?

• array anarray[20][20];
• int anarray[20][20];
• int array[20, 20];
• char array[20];

Find the output

class Test {

public static void main(String args[]) {

int arr[2];

System.out.println(arr[0]);

System.out.println(arr[1]);

}

}

• Compile error

• Exception

• Garbage Value

  Garbage Value

• 0

  0

Which of the following is FALSE about arrays on Java

• A java array is always an object

• Length of array can be changed after creation of array

• Arrays in Java are always allocated on heap

What is the length of the following array: byte[] data = { 12, 34, 9, 0, -62, 88 };

• 1

• 5

• 6

• 12