Could someone please help me with these problems and explain how they are done?

Question

Could someone please help me with these problems and explain how they are done? Thank you!

b) //main method intp array-B-1, 2, 3); method(array, array[O|) public static void method(int source, int value) source = new inteurselength); for (int i-0; issourlenetb: ti) source[] = value+1; Heap Main Stack Frame Identifier Address Contents 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 Identifier Address Contents 101 102 103 array Method Stack Frame Identifier Address Contents source value 200 201 202

Explanation / Answer

b)

Initially array values are

array[0]=9

array[1]=-1

array[2]=2

array[3]=3

we are passing array , array[0] to method where array[0]=9

so inside method source is referring to starting of array and value is equal to 9

source.length will return one because it refers to the starting element of the array not the entire array
so loop runs for i=0 only

hence source[0] becomes 9+1 = 10

c)

Initially array values are

array[0]=7

array[1]=1

array[2]=5

array[3]=2

array[4]=3

we are passing array ,10,12 to method

so inside method source is referring to starting of array and a=10,b=12

so source[0]=10 and source[1]=12

but source = new int[3] allocates a new memory to source equal to size of 3 integers(array of 3 intgers), so the values previously stored are lost

d)

in above b,c method doesnt return anything but in this case it returns int[](its written public static int[] method)

intially

data[0]= 9 ,data[1]= 1 ,data[2]= 3 ,data[3]= 5,data[4]= 7

and data[2] =3 is passed to method so size in method becomes 2

so source will be an array of 2 integers

and source[0]=source[1]=size=2

and source is returned and alloted to data , hence starting address of data becomes starting address of source

so data[0]= 2 data[1]= 2 ,data[2],data[3],data[4] will have garbage valiues

This happens so because any array is alloted a contiguous memory, so if data[0] is at address 200(for example) the data[1] will be at 200+(size of int) = 204 and so on

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