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What is the difference between call by value, call by reference, call by address?
No answers
Milan unjiya
- Jan 2nd, 2014
Call?by?value--->?when?we?pass?normal?variable?in?method, it?is?call?by?value.
Call by?reference--->?when?we?pass?object?as?parameter, it?is?passed?by?reference.
Call?by?address--->?call?by?reference?and?call?by address both are?same.mani_miit
- Dec 14th, 2009
Call by value--->You are passing primitive value for your method argument.call?by ref--->You are passing objectcall by address-->reference and address both are same.
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Java SUPER
Is SUPER a keyword or method? Explain Why?
usmansleem
- May 24th, 2011
This is basically used to call the constructor of the base class. It is a method of course.
Narsi Reddy
- Apr 29th, 2011
Super is a keyword in Java because it is defined as keyword in java and super is not a keyword or variable which belongs to any class.
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What is uni code
sampra
- Mar 10th, 2008
In unicode all character availbale in the world has been assign with a unique number that is for internationalization
Jagadeesh.gowd
- Jul 26th, 2007
What is Unicode? Unicode provides a unique number for every character, no matter what the platform, no matter what the program, no matter w...
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Int i;void main(){ int j=100,k; cout
syam
- Dec 14th, 2011
Compilation fails, why because it does not have proper syntax and structure.
sarfraj mulani
- Sep 1st, 2010
This program gives error becoz here j=100 but the value of j is not used.
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What is differents between object and static object?
Anand Tiwari
- Nov 23rd, 2014
A static object is a class all of whose members (functions and data) are declared static
rajeshtester
- Feb 23rd, 2010
An Object is an physical entity of logical class definition, and in Java there is nothing called static object.
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Serializable is used to read or write the object and find the state of an object. What is the use of finding the state of an object, Explain with an example?
VenkitaKrishnan
- Apr 20th, 2009
The concept of Serializable is that we can recreate the state of an object from a permanent source like a file, xml etc.Example: I had personally implemented used in scenario where i had an organizati...
richakharya
- Apr 20th, 2009
When the object supposed to be sent across the network serializing technique makes sure the data is not lost in case of network failure. Seralizaing? is converting the object to its?byte code form and then sending it accross the network.
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How can i call a funtion,given its name as string?
sampra
- Mar 10th, 2008
Class clsObj = Class.forName("ClassName"); Method method = clsObj.getMethod("methodName",null); method.invoke(clsObj.newInstance(),null);
ashishvyas_83
- Mar 1st, 2007
We can also call the method using Introspection API, Eclipse uses this API to get the name of all the methods available in a class after we enter "." after a Class Instance or Class Name for static methods;
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What is the need of an abstract class?
If I write all of concrete methods in one class and all abstract methods in an interface and extend and implement both in third class assume that third class don't extend any other class?
alkumar2000
- Aug 15th, 2008
Abstract is most useful when you are creating a framework..take the example of template method pattern which is used in the templates provided by spring framework for the support of jdbc or hibernate...
sampra
- Feb 13th, 2008
If we have some method which body is not defined till declartion of class and body is implemented in subclass later then declare that class as abstract class.If a class has atlest one abstract method then we have to declare class as abstract class
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Friend Function Overload
Why friend function cannot be used to overload the assignment operator?
pavanbitsgoa
- Jan 6th, 2011
Java is actually designed to work same as C++ but avoid complex features like operator overloading, friend functions, multiple inheritence.
kunal1903
- Jun 17th, 2010
In Java it is not possible to overloading OPERATOR such as +/-/* etc. We can do that is C++. In Java there won't be any friend function. ...That is why we can't use friend function overloading in Java
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What are java archives?
sampra
- Feb 13th, 2008
Java archive is the collection of builtinn or user define packages(.class file)
sarithahere528
- Oct 23rd, 2007
Friends i have a small doubt ... i heard that Jar will supported by all platforms and Zip wont suport is it true ?
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Why in case of java header file name is not required ?
CHANDRA SEKHAR JONNALAGADDA
- Jun 11th, 2006
hi friends java having a classes and packeges so no need to header file in java. so header file is not required. by...
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What is the difference between Unicode and hash code?
sampra
- Feb 13th, 2008
Unicode is used for globlization ie its support all languages its use for globlization where as hash code is a unique number which is given to object by JVM .hash code is implement by some...
sarithahere528
- Oct 23rd, 2007
Equal objects should have the same hashcode ... i.e when u go for overridding a equal() method , u should override hashcode() also
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What is the purpose/uses of run-time polymorphism? Is dynamic binding only way to achieve run-time polymorphism?
sflebrun
- Sep 15th, 2009
Run-time polymorphism provides the ability to use late-binding. In other words, the function called or the data member accessed is not determined until run-time and is based on the type that a v...
goksn
- Sep 14th, 2009
Purpose of Runtime polymorphism:Run time polymorphism is a mechanism by which a call to overriden function is resolved at runtime rather than compile time.For e.gIf (user clicks link 1) then{obj1.over...
Java OOPS Interview Questions
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