Sawaal

 Technology Questions

Popular Latest Rated
Q:

What is the output of this program ?

class main_arguments {
            public static void main(String [ ] args)
            {
                String [][] argument = new String[2][2];
                int x;
                argument[0] = args;
                x = argument[0].length;
                for (int y = 0; y < x; y++)
                    System.out.print(" " + argument[0][y]);           
            }
        }

A) 1 1 B) 1 0
C) 1 0 3 D) 1 2 3
 
Answer & Explanation Answer: D) 1 2 3

Explanation:

In argument[0] = args;, the reference variable arg[0], which was referring to an array with two elements, is reassigned to an array (args) with three elements.
Output:
$ javac main_arguments.java
$ java main_arguments
1 2 3

Report Error

View Answer Report Error Discuss

Filed Under: Java
Exam Prep: GATE

7 95959
Q:

Which of the following can't be done with client-side JavaScript?

A) Sending a form's contents by email B) Storing the form's contents to a database file on the server
C) Validating a form D) None of the above
 
Answer & Explanation Answer: B) Storing the form's contents to a database file on the server

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Web Technology

50 65875
Q:

class Hell {

public static void main(String[] args) {

Integer i = 42;

String s = (i<40)?"life":(i>50)?"base":"ball";

System.out.println(s);

}

}

A) null B) ball
C) base D) None
 
Answer & Explanation Answer: B) ball

Explanation:

D is correct. This is a ternary nested in a ternary with a little unboxing thrown in.Both of the ternary expressions are false.

Report Error

View Answer Report Error Discuss

Filed Under: Java

9 51865
Q:

try { int x = Integer.parseInt("two"); }

Which could be used to create an appropriate catch block?

A) ClassCastException B) IllegalStateException
C) NumberFormatException D) None
 
Answer & Explanation Answer: C) NumberFormatException

Explanation:

C is correct. 'Integer.parseInt' can throw a NumberFormatException, and IllegalArgumentException is its superclass 

Report Error

View Answer Report Error Discuss

Filed Under: Java

9 51459
Q:

What is the difference between agglomerative and divisive Hierarchical Clustering?

Answer

- Agglomerative Hierarchical clustering method allows the clusters to be read from bottom to top and it follows this approach so that the program always reads from the sub-component first then moves to the parent. Whereas, divisive uses top-bottom approach in which the parent is visited first then the child. 


- Agglomerative hierarchical method consists of objects in which each object creates its own clusters and these clusters are grouped together to create a large cluster. It defines a process of merging that carries on till all the single clusters are merged together into a complete big cluster that will consists of all the objects of child clusters. Whereas, in divisive the parent cluster is divided into smaller cluster and it keeps on dividing till each cluster has a single object to represent.

Report Error

View answer Workspace Report Error Discuss

Subject: Data Warehousing

6 49982
Q:

main() {

int i;

printf("%d",scanf("%d",&i)); // value 10 is given as input here

}

A) 1 B) 2
C) 3 D) 4
 
Answer & Explanation Answer: A) 1

Explanation:

Scanf returns number of items successfully read and not 1/0. Here 10 is given as input which should have been scanned successfully. So number of items read is 1.

Report Error

View Answer Report Error Discuss

Filed Under: Java

5 48233
Q:

public abstract class Shape {

private int x;

private int y;

public abstract void draw();

public void setAnchor(int x, int y) {

this.x = x;

this.y = y;

}

}

Which two classes use the Shape class correctly?

A) public class Circle implements Shape { private int radius; B) public abstract class Circle extends Shape { private int radius; }
C) public class Circle extends Shape { private int radius; public void draw(); D) None
 
Answer & Explanation Answer: B) public abstract class Circle extends Shape { private int radius; }

Explanation:

Only B is true

Report Error

View Answer Report Error Discuss

Filed Under: Java

4 44317
Q:

public class Threads2 implements Runnable {

public void run() {

System.out.println("run.");

throw new RuntimeException("Problem");

Which among the following is true?

}

public static void main(String[] args) {

Thread t = new Thread(new Threads2());

t.start();

System.out.println("End of method.");

}

}

A) java.lang.RuntimeException: Problem B) run. java.lang.RuntimeException: Problem
C) End of method. java.lang.RuntimeException: Problem D) End of method. run. java.lang.RuntimeException: Problem
 
Answer & Explanation Answer: D) End of method. run. java.lang.RuntimeException: Problem

Explanation:

Only D can be true

Report Error

View Answer Report Error Discuss

Filed Under: Java

2 40812