Question 1:
int P [ ]={ 12,14,16,18}; int Q[ ]={ 20,22,24};
Place all elements of P array and Q array in the array R one after the other.
(a) What will be the size of array R [ ] ? R.length = 7
(b) Write index position of first and last element?
Index of the first element =0
Index of the last element=6
Question 2:
If A[][] is a double dimensional array, calculate the number of rows( M) and number
of columns(C).
(a) int R= A.length;
(b) int C=A[0].length //each row is considering as a single dimensional array
If the matrix is given as an argument
class Sample
public int (int a[][])
//printing the matrix
for(int i=0;i<a.length;i++)
for(int j=0;j<a[0].length;i++) //or for(int j=0;j<a[i].length;i++)
System.out.println(a[i][j]+ “ ”);
}
System.out.println();
Question 3:
A square matrix is said to be Symmetric if the element of ith row is equal to the jth column.
Write a program to create a 3X3 matrix , display it and check whether it is a Symmetric
matrix or not.
Example:
1 2 3
2 4 5
3 5 6
import java.util.*;
class Symetric
public void check()
Scanner sc= new Scanner(System.in);
int A[][]=new int[3][3];
//storing elements in the matrix
for(int i=0;i<3;i++)
{
for(int j=0;j<3;j++)
System.out.println("Enter a number:");
A[i][j]=sc.nextInt();
//printing the original matrix
System.out.println("Original Matrix is:");
for(int i=0;i<3;i++)
for(int j=0;j<3;j++)
System.out.print(A[i][j]+"\t");
System.out.println();
//checking whether the matrix is Symmetric or not
int f=0;
for(int i=0;i<3;i++)
for(int j=0;j<3;j++)
if(A[i][j]!=A[j][i])//if not equal
{
f=1;
break;
if(f==0)
System.out.println("It is a Symmetric Matrix.");
else
System.out.println("It is not a Symmetric Matrix");
