Q1(B)  x is null. y is not null but has no element.

int[] x;
int[] y= new int[0];


Q2 (C) x[0] is null,  but x.length is 3

int[][] x= new int[3][];


Q3 (E)   A and C ma[0] == ma[4] and
         ma is an array of references, No Musician object created 
Musician[] ma  = new Musician[5];


Q4 (E) {2,3,4,4}

int[] x={1,2,3,4};
for (int i = 0; i < x.length -1; i++)
    x[i] = x[i+1];

Q5 (A) Error, accessing x[-1]

int[] x={1,2,3,4};
for (int i = 0; i < x.length; i++)
    x[i] = x[i-1];


Q6 (D) {1,1,1,1}

int[] x={1,2,3,4};
for (int i = 1; i < x.length; i++)
    x[i] = x[i-1];


Q7 (A) Error! y is null

int[] x={1,2,3,4};
int[] y;
for (int i=1; i < x.length; i++)
   y[i] = x[i-1];



Q8 (C) {0,1,2,3,0}

int[] x={1,2,3,4};
int[] y= new int[5];
for (int i=1; i < x.length; i++)
   y[i] = x[i-1];