Ishan Dhande

• Jan 10th, 2017

So now lets talk about the word "Costly" If we look at the time consumption in creating a connection, socket creation takes lot of time when compared to actual query execution [which is the operation...

aarty.lamba

 Profile Answers by aarty.lamba Questions by aarty.lamba

• Nov 24th, 2009

WebSphere Application Server enables administrators to establish a pool of database connections that can be shared by applications on an application server. Connection pooling spreads the conne...

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Saurav

• Jan 5th, 2017

Hi,
The question is not about HashTable or HashMap.The question is about technical or business scenario where
hash based implementation can be used.So rather than copy paste from internet please suggest something concrete if you really have worked on.

tarunarora

 Profile Answers by tarunarora Questions by tarunarora

• Dec 2nd, 2006

Hi...to understand the basic difference b/w the two..u shd know something abt synchronization...n im assuming u upderstand synchronization in java...Scenario can be a very simple one...consider P2P (P...

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somewhere I read we should override equals() and hasCode() methods while implementing Comparable interface... I could not understand why should i do so... Kindly help.. thx in advance.

cool2sathish

 Profile Answers by cool2sathish Questions by cool2sathish

• Dec 1st, 2016

Not necessary to override equals() and hashCode() methods, since Comparable interface force you to override compareTo() method.

Murali100

 Profile Answers by Murali100 Questions by Murali100

• Sep 30th, 2012

Equals () : It must define an equality relation.In addition it must be consistent(if the objects are not modified , then it must keep returning the same value) HashCode() : It must also be consistent...

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What is the difference between java command line arguments and C command line arguments?

Zaiggen

• Nov 27th, 2016

None, both input lines comes from the standalone input console before being processed by his respective bytecode call inside the class or C executable program. Inside each bytecode process will be taken by his respective wrapper to convert or represet the input data and handle it.

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prachi patil

• Oct 24th, 2016

Java: The Most Secure Programming Language? What makes Java the most secure programming language? Or is it really so? We will discuss the same in this blog. If you wish to make a career in Java progr...

aleemkh

 Profile Answers by aleemkh Questions by aleemkh

• Jul 29th, 2008

Before talking about secure , let us compare the difference between C and Java.First a C program is coverted as shown belowC(sourcecode) --> compiler---> compiles to binary (101010)---> OperatingSyste...

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Prashant Shingne

• Sep 9th, 2016

We can use OOPS Concept run-time binding to call expected functionality. No need of if clause, provided everything is represented in objects.

Sukhrob

 Profile Answers by Sukhrob Questions by Sukhrob

• Dec 26th, 2015

? is useful to compare two arguments

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Prashant Shingne

• Sep 9th, 2016

There are 4 ways to create object
1.New Operator Employee emp = new Employee();
2.Object.clone()
3.class.forName()
4.Deserilization readObject();

Ashish

• Jun 12th, 2014

There are 7 ways to create object... 1 Using : new keyword 2 Using : Static Factory 3 Using : Instance Factory 4 Using : Factory Pattern 5 Using : De-serialization 6 Using : Clone Method 7 Using : new...

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saurabh

• Sep 1st, 2016

If we write return statement in try block
will then finally block be executed?

try{
return ture;
}
catch()
{
}
finally{
??

}

satish

• Sep 25th, 2015

Yes we can.

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Bala Challa

• Aug 16th, 2016

In Java, primitives are pass by value and Objects are pass by reference.

DHARMPAL CHAUDHARY

• Aug 11th, 2016

Actually it is clearly mentioned in Java documentation by Oracle that Java doesn't supports call by reference. Everything in Java is "Call by Value"

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Today we have a special function called Mystique Function.Mystique function for any value x is denoted by H(x). H(x) is defined as the count of positive integers such that (Let k be one of such positive integer)

1) x%k=0

2) for every integer z it satisfies (z^k-z)%k=0.

3) k>1

Now given a value x you need to print the sum of H(2)+H(3)+H(4)..H(x).

Rajesh Swarnkar

• May 8th, 2016

The condition 2 is not very clear.
"for every integer z it satisfies (z^k-z)%k=0"

How would I test the satisfiability against every integer z as they are infinite?

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Bikram

• May 4th, 2016

Throwable is the super class for Error and Exception class. Throwable extends Object class. But more often you will not see the user will be extending Throwable. It is used for Handling Exception. But also when you will be catching multiple Exceptions then it is a good idea to implement this one.

Anny

• Dec 18th, 2015

Thorwable is the parent class for error and exception. It is used for exception handling

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When the Subclass method is called, does the SuperClass constructor execute? If so, which Constructor executes first (Sub Class OR Super Class) for the given below scenarios?
a. Given that we are NOT inheriting SuperClass constructor?
b. Given that we are inheriting SuperClass constructor?

Shrimp

• Apr 1st, 2016

When a sub class method is called from parent class, constructor will be executed dude, constructor only executed when you create an object

Manjunath_7_89

 Profile Answers by Manjunath_7_89 Questions by Manjunath_7_89

• Mar 25th, 2016

Super class constructor could be invoked only when super() is used and it has high priority of invoking, once super class constructor is invoked the setted public/protected variables are inherited in subclass

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Manjunath_7_89

 Profile Answers by Manjunath_7_89 Questions by Manjunath_7_89

• Mar 25th, 2016

Interface is majorly supported for IS-A relationship ie; Inheritance. Writing an interface is similar to writing a class. But a class describes the attributes and behaviours of an object. And an inter...

meena

• Feb 16th, 2016

Consider a construction of a building. The basic entire PLAN of the building I what an INTERFACE does. Next, the implementation of that PLAN is done by CONCRETE methods. If some of the work is done and still some is left is what ABSTRACT method/class does.

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Manjunath_7_89

 Profile Answers by Manjunath_7_89 Questions by Manjunath_7_89

• Mar 25th, 2016

Abstract Class
1. Could be Inherited.
2. Couldnt instatiated.
3. Could add few more methods.
4. Incomplete class

Final Class
1. Final version of Class
2. Couldnt be inherited.
3. Could be instantiated.
4. Couldnt add any more methods.

baban

• Feb 11th, 2016

Abstract class cannot create object but final class create a object
abstract class which have must a subclassed but final class which have no subclassed

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Manjunath_7_89

 Profile Answers by Manjunath_7_89 Questions by Manjunath_7_89

• Mar 25th, 2016

Static methods cannot be overridden because method overriding only occurs in the context of dynamic (i.e. runtime) lookup of methods. Static methods (by their name) are looked up statically (i.e. at c...

Ramesh

• Feb 4th, 2016

If a subclass defines a class method with the same signature as a class method in the superclass, the method in the subclass hides the one in the superclass. You didn't override the method a(), because static methods are not inherited. If you had put @Override, you would have seen an error.

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i have not ..asked in TCS interview ..if any one have plz answer me on er.anuj.mittal@gmail.com

kiran

• Mar 1st, 2016

Because of primitive data types, if we use Wrapper classes then Java is 100% pure object oriented.

pranathi repaka

• Feb 11th, 2016

Object oriented is a concept which not only deals with objects but also with other concepts like class, object, encapsulation, abstraction, message passing, dynamic binding, polymorphism and inheritan...

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In the expression String.format("%2d", 5)
what are the things below, be specific. for example, if the thing is an operator, indicate whether it is binary/unary and whether it is arithmetic/logical/relational. If it is a method, indicate whether its static or not

a. String
b. .
c. format()
d. "%2d" and 5

meena

• Feb 16th, 2016

It returns a formatted string with a value of 5.

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I have not mistaken extends for polymorphism or encapsulation or anything else.. my question is correct!!!

ANKIT SHARMA

• Feb 14th, 2016

In Inheritance the object aquires all the properties & behaviour of parent object

sampra

 Profile Answers by sampra Questions by sampra

• Mar 6th, 2012

Inhertence is a concept extens is a key word but both are use for same purpose

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himanshu verma

• Jan 27th, 2016

There are so many difference between Swing and AWT.

Swing is light weight and platform independent while AWT is heavy-weight and platform dependent features.

Swing has some extra components such as JColorChoser while AWT does not have.

girish kumar

• Jan 4th, 2016

Explain native code used by awt

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Arraylist is resizable where as using array it is not possible.

Sukhrob

 Profile Answers by Sukhrob Questions by Sukhrob

• Dec 24th, 2015

First difference: array is already with fixed size while array lists size could be dynamically changed.

Secondly, array can include only the same type of data while array list can consist of different primitive data types as well as objects.

rakesh

• Nov 18th, 2015

Array is collection of similar data type values. We cant resizable and growable of array. It is already fixed when you declared while array list works as a dynamic in which size could be grow. It is a part of collection framework to handle or store the collection of object not any type of values.

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