Java - Array

what is the output of the following code

int arr[] = new int[10];
           for(int i=0;i<10;++i){
               arr[i] = i;
               System.out.println(arr[++i] + " ");
           }

what is the output of the following code

int arr[] = new int[10];
           for(int i=0;i<10;++i){
               arr[i] = i;
               System.out.println(arr[++i] + " ");
           }

1 Mark(s)

0 2 4 6 8
1 3 5 7 9
0 1 2 3 4 5 6 7 8 9
0 0 0 0 0

What will get output

           int arr[] = new int[] {0,1,2,3,4,5,6,7,8,9};
           int n=6;
           n = arr[arr[n] /2];
           System.out.println(arr[n] / 2);

What will get output

           int arr[] = new int[] {0,1,2,3,4,5,6,7,8,9};
           int n=6;
           n = arr[arr[n] /2];
           System.out.println(arr[n] / 2);

1 Mark(s)

Given the following:

double[][] things =
{ {1.2, 9.0},
{9.2, 0.5, 0.0},
{7.3, 7.9, 1.2, 3.9} } ;
What is the value of things.length ?

Given the following:

double[][] things =
{ {1.2, 9.0},
{9.2, 0.5, 0.0},
{7.3, 7.9, 1.2, 3.9} } ;
What is the value of things.length ?

1 Mark(s)

Consider the following code.

int number[ ]=new int[5];

After execution of this statement which of the following are true.

i) number [0] is undefined ii) number[5] is undefined
iii) number [4] is null iv) number.length() is 5

Consider the following code.

int number[ ]=new int[5];

After execution of this statement which of the following are true.

i) number [0] is undefined ii) number[5] is undefined
iii) number [4] is null iv) number.length() is 5

1 Mark(s)

i and ii only
ii and iii only
ii and iv only
i and iv only

What is the out for following code (input given 2 4 2.2 8.1 7)

           float[] x = new float[5];
           Scanner sc = new Scanner(System.in);
           System.out.println("enter values");
           for(int i=0;i<5;i++)
               x[i] = sc.nextFloat();
           for(int i=0;i<5;i++)
               System.out.println(x[i] + " ");

What is the out for following code (input given 2 4 2.2 8.1 7)

1 Mark(s)

2.0 4.0 2.2 8.1 7.0
Error: Input mismatch exception
2 4 2.2 8.1 7
none of these

What is the output for following code (input given 1 2 3 4 5 6 7 8 9 10)

           int[] x = new int[10];
           Scanner sc = new Scanner(System.in);
           System.out.println("enter values");
           for(int i=0;i<10;i++)
               x[i++] = sc.nextInt();
           for(int i=0;i<10;i++)
               System.out.println(x[i] + " ");

What is the output for following code (input given 1 2 3 4 5 6 7 8 9 10)

1 Mark(s)

1 2 3 4 5 6 7 8 9 10
1 0 2 0 3 0 4 0 5 0
1 2 3 4 5
1 2 3 4 5 0 0 0 0 0

Given the following:

double[][] things =
{ {1.2, 9.0},
{9.2, 0.5, 0.0},
{7.3, 7.9, 1.2, 3.9} } ;
What is the value of things[2].length ?

Given the following:

double[][] things =
{ {1.2, 9.0},
{9.2, 0.5, 0.0},
{7.3, 7.9, 1.2, 3.9} } ;
What is the value of things[2].length ?

1 Mark(s)

which one is correct for transpose of the matrix

(i)   int[][] a = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9} };
           int[][] b = {{0, 0, 0}, {0, 0, 0}, {0, 0, 0} };
           int i,j;
           for(i=0;i<3;i++){
           for(j=0;j<3;j++){
                   b[i][j] = a[j][i];
               }
           }
           System.out.println(Arrays.deepToString(b));

(ii)           int[][] a = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9} };
           int[][] b = {{0, 0, 0}, {0, 0, 0}, {0, 0, 0} };
           int i,j;
           for(i=0;i<3;i++){
           for(j=0;j<3;j++){
           System.out.print(a[j][i] + " ");
               }
               System.out.println();
           }

which one is correct for transpose of the matrix

1 Mark(s)

(i) and (ii)
Only (i)
Only (ii)
none of these

What is the output of the following code?

public static void main(String args[]){
        double[] myList = {1, 5, 5, 5, 5, 1};
double max = myList[0];
int indexOfMax = 0;
for(int i = 1; i < myList.length; i++){
        if(myList[i] > max){
max = myList[i];
    indexOfMax = i;
        }   }
       System.out.println(indexOfMax);
}

What is the output of the following code?

1 Mark(s)

What is the output for following code

       int[] x = {120,200,017};
           for(int i=0;i<x.length;i++)
           System.out.println(x[i] + " ");

What is the output for following code

       int[] x = {120,200,017};
           for(int i=0;i<x.length;i++)
           System.out.println(x[i] + " ");

1 Mark(s)

120 200 016
120 200 16
120 200 14
016 is a Compilation error, it should be written as 16

What is the output for following code

           int[] x = {1,2,3,4};
           int[]y=x;
           x = new int[2];
               for(int i=0;i                System.out.println(y[i] + " ");

What is the output for following code

           int[] x = {1,2,3,4};
           int[]y=x;
           x = new int[2];
               for(int i=0;i                System.out.println(y[i] + " ");

1 Mark(s)

1 2 3 4
0 0 0 0
1 2
0 0
none of these

In java arrays are

1 Mark(s)

Object
Object references
Primitive data type
none of these

What is the out for following code (input given 2 4 2.2 8.1 7)

           int[] x = new int[5];
           Scanner sc = new Scanner(System.in);
           System.out.println("enter values");
           for(int i=0;i<5;i++)
               x[i] = sc.nextInt();
           for(int i=0;i<5;i++)
               System.out.println(x[i] + " ");

What is the out for following code (input given 2 4 2.2 8.1 7)

1 Mark(s)

2 4 2 8 7
Error: Input mismatch exception
2 4 2.2 8.1 7
none of these

What is the result of compiling and running the following code?

public static void main(String[] args){
int[] a = new int[0];
System.out.print(a.length);
}

What is the result of compiling and running the following code?

public static void main(String[] args){
int[] a = new int[0];
System.out.print(a.length);
}

1 Mark(s)

0
Compilation error, arrays cannot be initialized to zero size.
Compilation error, it is a.length() not a.length.
none of these

To print array values in ascending order. What you in Line 1 and Line 2

public static void main(String args[])
{
           int a[] = new int[] {90,20,10,80};
           int i,j,temp,n;
           n=a.length;
           for(i=0;i<n;i++){
               for(j=i+1;j<n;j++){
                   if( ///Line 1 ){
                       ///Line 2
                   }
               }
           }
           for(i=0;i<n;i++)
               System.out.println(a[i]);
       }

To print array values in ascending order. What you in Line 1 and Line 2

1 Mark(s)

Line 1: (a[i] > a[j]) Line 2: Swap of two numbers a[i] and a[j]
Line 1: (a[i] < a[j]) Line 2: Swap of two numbers a[i] and a[j]
Line 1: (a[i] > a[j]) Line 2: add the two numbers with another value
none of these

What is the output for following code

int a[] = new int[] {90,20,10,80,50};
           String s = "123567";
           System.out.println(a.length);
           System.out.println(s.length());

What is the output for following code

int a[] = new int[] {90,20,10,80,50};
           String s = "123567";
           System.out.println(a.length);
           System.out.println(s.length());

1 Mark(s)

5 6
4 2
4 12
none of these

What is the code at Line 1 to multiply the two matrix

           int[][] a = {{1, 1, 1}, {1, 1, 1}, {1, 1, 1} };
           int[][] b = {{1, 1, 1}, {1, 1, 1}, {1, 1, 1} };
           int[][] c = {{0, 0, 0}, {0, 0, 0}, {0, 0, 0} };
           int i,j,k;
           for(i=0;i<3;i++){
               for(j=0;j<3;j++){
                   for(k=0;k<3;k++)
                   ///Insert code Line 1
               }
           }
           System.out.println(Arrays.deepToString(c));

What is the code at Line 1 to multiply the two matrix

1 Mark(s)

c[i][j] = a[i][k] * b[k][j];
c[i][j] = c[i][j] + a[i][k] * b[k][j];
c[i][j] = a[i][j] * b[i][j];
none of these

What will be output

Public static void main(String args[]){
Int[] x = new int[3];
System.out.println(“x[0] is “ +x[0]);
}

What will be output

Public static void main(String args[]){
Int[] x = new int[3];
System.out.println(“x[0] is “ +x[0]);
}

1 Mark(s)

The program has a compile error because the size of the array wasnt specified when declaring the array.
The program has a runtime error because the array elements are not initialized.
The program runs fine and displays x[0] is 0.
The program has a runtime error because the array element x[0] is not defined

How to find the length of the Line 1

int[][][] test = {
{
{1, -2, 3},
{2, 3, 4}
},
{
{-4, -5, 6, 9}, //Line 1
{1},
{2, 3}
}
};

How to find the length of the Line 1

int[][][] test = {
{
{1, -2, 3},
{2, 3, 4}
},
{
{-4, -5, 6, 9}, //Line 1
{1},
{2, 3}
}
};

1 Mark(s)

test[0][1] . length;
test[1][0] . length;
test[1][1] . length;
test[1][0][0] . length;

Which one of the following is a valid statement?

1 Mark(s)

char [] c=new char();
char[] c=new char[5];
char[] c=new char(5);
char[] c=new char[];

Java - Array : Question 1 of 20