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Core Java Question
Will it compile and run?? If No ... please explain?
java
public class Test{
public static void main(String asd[]){
System.out.println(" Test!! ");
}
}
protected class A{
}
private class B extends A{
}
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Coding question
Given the age of 10 couples(husband and wife), print Number of years of age difference for all the 10 people Input Specification First 10 inputs contain the ages of all husbands And the next 10 are the ages of all wives Output Specification Output should be exactly 10 lines giving the number of years of the age difference between them. Note: output is a positive integer Sample Input 50 40 53 24 78...
Can methods be overloaded based on the return types
Anonymous
- Mar 3rd, 2016
We can call the method by their name and not by their type;;
Method::
int sum()
void sum()
calling::
Where object is a;
a.sum();
here, it will arise ambiguity which method to call, void sum() or int sum() and thus compiler give error
dheerendra
- Sep 2nd, 2008
Methods cannot be overloaded only on the basis of return type atleast one argument should be different, otherwise compiler will give the message "The function is already defined in the class".
What is the difference between interface and abstract class
ashokhullur
- Jul 22nd, 2010
Abstract classes can have only non abstract methods. Its not mandatory that it must have atleaset one abstract method. Declaring class using keyword abstract is enough to make class as abstract.
anooshay
- May 16th, 2008
Interface: In interface just signature of the methods are defined(means abstract meathod). there is?no a single method which has body.e.g. void add();Abstract class: In a abstract class some method a...
State true or false :- Final methods can be overridden.
A) TrueB) False
Difference between == and equals()
sanjay637
- May 27th, 2008
The operator == compares the content of two stringsequals method compares the references of two variablesgenerally we use == operator for comparing numbersthankssanjay bandi
jaiho123
- May 13th, 2008
public class Test1{public static void main(String args[]){String s1="ashu";String s2="ashu";if(s1==s2) ...
Which containers use a border Layout as their default layout
The window, Frame and Dialog classes use a border layout as their default layout.
ajeet achal
- Nov 28th, 2016
Default border layout is content pane.
What is the difference between static and non-static variables
A static variable is associated with the class as a whole rather than with specific instancesof a class. Non-static variables take on unique values with each object instance.
sivapurammani
- Dec 17th, 2013
Static variables are class variables, we can access these variables using class name and the variable value remains same for all the objects. Generally we can use these static variables as constants f...
Arvindanathan
- Dec 3rd, 2013
"c //feel it by doing package com.practise; public class StaticStringDemo { static String strObject1; String strObject2; public static void main(String args[]) { StaticStr...
What is the range of the char type?">What is the range of the char type?
A) 0 to 215-1 B) 0 to 216-1 C) 0 to 215 D) 0 to 216
jansi
- Feb 28th, 2012
0 to 2^15-1
abhishek79
- Mar 14th, 2007
the range of char is 0 to 2^16 -1http://java.sun.com/docs/books/tutorial/java/nutsandbolts/datatypes.html) char range is 65535 that is equivalent to 2^16 -1 so answer B is right
Java is a Programming Language.
A) TrueB) False
What is the differance between equals() method and ==
Balrog
- Jan 31st, 2007
Your'e WRONG!!
String s1 = "hello";
String s2 = "hello";
is s1 === s2? TRUE
This is because SAME literals have the same reference in memory!!!
Don't post incorrect response.sitaram81581
- May 22nd, 2006
The operator '==' checks whether or not two variables ( both primitive like 'int' variable and reference variables like 'String' variable) contain same data. In case of objects, reference variables co...
AND
String str=new String("abc");
">Is there any difference between String str="abc";ANDString str=new String("abc");
sensashan
- Oct 12th, 2009
Yes there is a difference. In case of str = "abc" we are creating an anonymous object and assigning it the reference str. But in case of str = new String("abc"), we are actua...
vinaygadiraju
- Oct 23rd, 2008
class A {..String s1="abc";String s2=new String "abc";..}The first line creates (sort of, see below) the String "abc" in the String pool, and s1 points to it. The second ...
What is the difference between a break statement and a continue statement
A break statement results in the termination of the statement to which it applies (switch,for, do, or while). A continue statement is used to end the current loop iteration andreturn control to the loop statement.
sandra
- Jun 13th, 2016
What happens if break is not used in switch statement?
komalnk
- Mar 1st, 2016
A break statement results in the termination of the statement to which it applies (switch,for, do, or while). A continue statement is used to end the current loop iteration and return control to the loop statement.
Is it true the JAVA is realy a plateform indepandent?
no, because Java does not support multiple inheritance directly.
Basil
- Sep 14th, 2007
JAVA is platform independent. It means it can run in any platform. The thing is that? the platform should have capability to run class file. The class file organised as it can run in any platform. Thread and other stuff mentioned are concept.
Java was initially called as _____
A) Oak
yashashree
- Oct 22nd, 2016
Java was initially called as a GREEN. Becoz there team was GREEN. After that they renamed as Oak n JAVA
What is the difference between Iterator and Enumeration? What is the difference between exception and error?What is the difference between final, finally and finalized? What is Synchronisation in threadsWhat is the difference between wait(), join(), sleep(), notify() & notifyall() methods? When should i used notify() and notifyall() methods on threads? thank u sir/mam
svsrinivas
- Aug 10th, 2009
Error comes at compilation time, Exception comes at run time. final keyword is used in three ways final int i=10; This represents i is constant we can't change the value of i; If you used in front...
vinodkashyap
- Jul 9th, 2009
Iterator - Interface to iterate over collectionsEnumertion - Type of collecton of objectsException - Occurs when some logically wrong happens in program. Can be catchedError - Not in hands of develope...
Ans