Arrays
- What is the output of this program?
public class Result
{
public static void main(String args[])
{
int a[] = {5, 6, 7, 9, 11};
for ( int k = 0; k < a.length - 1; ++k)
System.out.print(a[k] + " ");
}
}
-
View Hint View Answer Discuss in Forum
NA
Correct Option: B
a.length() is 5, so the loop is executed for 4 times.
output: 5 6 7 9
- What is the output of this program?
import java.util.*;
public class ArrayExample
{
public static void main(String args[])
{
int arr[] = new int [10];
for (int i = 10; i > 0; i--)
arr[10 - i] = i;
Arrays.sort(arr);
System.out.print(Arrays.binarySearch(arr, 6));
}
}
-
View Hint View Answer Discuss in Forum
NA
Correct Option: E
5
- What is the output of this program?
import java.util.*;
public class ArrayExample
{
public static void main(String args[])
{
int arr[] = new int [5];
for (int k = 5; k > 0; k--)
arr[5 - k] = k;
Arrays.sort(arr);
for (int k = 0; k < 5; ++k)
System.out.print(arr[k]);;
}
}
-
View Hint View Answer Discuss in Forum
NA
Correct Option: A
Arrays.sort(arr) method sorts the array into 1,2,3,4,5.
- What is the output of this program?
import java.util.*;
public class ArraylistExample
{
public static void main(String args[])
{
ArrayList object0 = new ArrayList();
ArrayList object1 = new ArrayList();
object0.add("I");
object0.add("P");
object1.add("I");
object1.add(1, "P");
System.out.println(object0.equals(object1));
}
}
-
View Hint View Answer Discuss in Forum
NA
Correct Option: E
object0 and object1 are an object of class ArrayList hence it is a dynamic array which can increase and decrease its size. object.add(“N”) adds to the array element N and object.add(1,”N”) adds element N at index position 1 in the list, Both the objects object0 and object1 contain same elements i:e I & P thus object0.equals(object1) method returns false.
- Which of these methods can be used to search an element in a list?
-
View Hint View Answer Discuss in Forum
NA
Correct Option: B
binaryserach() method uses binary search to find a specified value. This method must be applied to sorted arrays.
