WorksheetsArrays in Java
Total questions: 25
Worksheet time: 42mins
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
Predict the output?
public class Main {
public static void main(String args[]) {
int arr[] = {10, 20, 30, 40, 50};
for(int i=0; i < arr.length; i++)
{
System.out.print(" " + arr[i]);
}
}
}
10 20 30 40 50
Compiler Error
10 20 30 40
class Test {
public static void main(String args[]) {
int arr[2];
System.out.println(arr[0]);
System.out.println(arr[1]);
}
}
0
0
garbage value
garbage value
Compiler Error
Exception
Which of the following statements correctly declares a two-dimensional integer array?
int Matrix[ ] = new int[5,4];
int Matrix[ ]; Matrix = new int[5,4];
int Matrix[ ][ ] = new int[5][4];
int Matrix[ ][ ] = int[5][4];
double[ ] data = new double[10];
System.out.println(numArray.length);
System.out.println("Number: " + numArray[0]);
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
Predict the output :
ArrayIndexOutOfBoundsException
null
0
1
