Sawaal

 Java Questions

Popular Latest Rated
Q:

Which containers use a border Layout as their default layout ?

Answer

The window, Frame and Dialog classes use a border layout as their default layout.

Report Error

View answer Workspace Report Error Discuss

Subject: Java - Technology

8 5554
Q:

I don't want my class to be inherited by any other class. What should i do?

Answer

You should declared your class as final. But you can't define your class as final, if it is an abstract class. A class declared as final can't be extended by any other class.

Report Error

View answer Workspace Report Error Discuss

Subject: Java - Technology

2 5517
Q:

Exception handling is targeted at

A) Compile time error B) Logical error
C) Run time error D) All of the above
 
Answer & Explanation Answer: C) Run time error

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Java - Technology
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Analyst , Bank Clerk , Bank PO

4 5454
Q:

What is the access scope of a protected method?

Answer A protected method can be accessed by the classes within the same package or by the subclasses of the class in any package.
Report Error

View answer Workspace Report Error Discuss

Subject: Java - Technology

1 5275
Q:

What’s the difference between Enumeration and Iterator interfaces ?

Answer

Enumeration is twice as fast as compared to an Iterator and uses very less memory. However, the Iterator is much safer compared to Enumeration, because other threads are not able to modify the collection object that is currently traversed by the iterator. Also, Iteratorsallow the caller to remove elements from the underlying collection, something which is not possible with Enumerations.

Report Error

View answer Workspace Report Error Discuss

Subject: Java - Technology

0 5152
Q:

What is the importance of finally block in exception handling ?

Answer

A finally block will always be executed, whether or not an exception is actually thrown. Even in the case where the catch statement is missing and an exception is thrown, the finally block will still be executed. Last thing to mention is that the finally block is used to release resources like I/O buffers, database connections, etc.

Report Error

View answer Workspace Report Error Discuss

Subject: Java - Technology

11 4987
Q:

How to identify a given positive decimal number as even/odd without using % or / operator ?

Answer

You may be very good at coding,but if you questioning how on earth you could solve this problem.Then here is a solution. If you remember the good old days of our primary school then the solution is easy,"division is a matter of iterative subtraction".


public class TestEvenOdd {
public static void main(String arg[ ]){
int num=6;
int result=num;
while(result>=2){
result=result-2;
}
if(result==1){
System.out.println("The number is odd");
}else{
System.out.print("The number is even");
}
}
}

Report Error

View answer Workspace Report Error Discuss

Subject: Java - Technology

3 4937
Q:

Which containers use a FlowLayout as their default layout ?

Answer

The Panel and Applet classes use the FlowLayout as their default layout.

Report Error

View answer Workspace Report Error Discuss

Subject: Java - Technology

3 4907