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How remote object parameters transferred between client and server in rmi
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What is the difference between String and StringBuffer?
sampra
- Feb 22nd, 2008
One majar diff also is string obj are immutable where as string buffer objects are mutable
paddu
- Oct 12th, 2007
Strings are immutable that means we cann't change the content or data. Where in the case of StringBuffer we can change the data or content that are presented in that.
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Does JVM maintain a cache by itself? Does the JVM allocate objects in heap? Is this the OS heap or the heap maintained by the JVM? Why
ch.ramachandrakumar
- Nov 16th, 2007
Whenever the object is created by the JVM, the object is allocated in the free?space called heap. The object reference placed in the frame, which is?the smallest part in the stack. (stack is built up?of many smallest frames). (frame is the smallest memory in the stack).
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Java Connection Pooling Questions
1.What is save point?2.Which among the four drivers is pure Java driver?3.What is Connection Pooling ?4.How differ servlet from its peer Technology?5.What are the parameters used in Connection pooling?6.What are the Normalization Rules? Define the Normalization?9.What are batch updates.10.How many JDBC drivers are there ?
nuttyvarun
- Feb 21st, 2008
Connection pooling is a technique of creating and managing a pool of connections that are ready for use by any thread that needs them, and generally leads to more predictable resource usage under load...
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How to catch an Error occurred in a class
Can we catch an Error occurred in a class by extending that class with Throwable Since, Exception and error is the sub class of throwable.If yes/no- why?
sampra
- Feb 20th, 2008
We can handle the exception but we cabt handle error super call of both is throwable
onelastman
- Jan 8th, 2008
yes...u can handle that error by extending with our class with throwable...but it is not recommended to do...pls don't consider errors as same to the exceptions..both are different...Errors ...
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What is BYTE Code?
sampra
- Feb 20th, 2008
BYTE code is a code genrated by JVM its in binary form and can be understood by JVM only
nuttyvarun
- Feb 20th, 2008
Bytecode is a term (others are p-code etc) used to denote a form of intermediate code, a binary representation of an executable program designed to be executed by an interpreter or virtual machine rat...
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Explain Garbage collection mechanism in Java
sampra
- Feb 20th, 2008
Like in c and c++ we have some mechanism to create the object and some mechnaishm to distroy the object .but in java we have mechanism to create the object but we dont have any mechanism t...
nuttyvarun
- Feb 20th, 2008
Garbage collection (GC) is a form of automatic memory management. The garbage collector, or just collector, attempts to reclaim garbage, or memory used by objects that will never be accessed or mutated again by the application.
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Please Give me an example for User defined Exception
nagarajcse82
- Nov 28th, 2005
in case of system defined exceptions,if any violation occured while executing the code,it will create a exception object and throw that object.in catch block u catch it and give appropriate message.us...
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What is daemon threads?
Srinivas Kallumadi
- Nov 4th, 2005
Any Java thread can be a daemon thread. Daemon threads are service providers for other threads running in the same process as the daemon thread. For example, the HotJava browser uses up to four daemon...
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If we have two public classes in a single java file ,how i have to give the name of the particular java file and how i can compile it?
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Which marker interface in java is having methods in it
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What do you meant by private constructor? why somebody declare only private constructor.
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Why we cannot define constructor of super class in a sub class ?
sampra
- Feb 15th, 2008
We cannot define constructor of super class in subclass because the order of execution of constructors will be from super class to current class. So there is no need of defining the super class constructor in subclass.
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What is abstraction?
sujatham
- Jul 31st, 2007
An abstraction denotes the essential properties and behaviors of an object that differentiate it from other objects. The essence of OOP is modelling abstractions, using classes and objects.
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Explain briefly about exception hierarchy in Java?
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What is the differance between Access Spacifier and Modifier.
sampra
- Feb 15th, 2008
Access specifire define the scope of member ie up to where it is accesblemodire chang the property of member
sujatham
- Aug 3rd, 2007
Modifiers are mainly two type:1.Access modifiers:public,private and protected.2.Non access modifier:strictfp,abstract,final,static,transient and volatile and native.Access specier is the synonym for access modifier.
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How can I swap two variables without using a third variable?Can u plz tell me the logic behind it..?
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What is the difference between ArrayList and Vector otherthan arrayList is not synchronised but Vector is?
sampra
- Feb 15th, 2008
It is similar to ArrayList, but with two differences: Vector is synchronized, and it contains many legacy methods that are not part of the collections framework.
sujatham
- Aug 10th, 2007
1. In vector the data is retrieved using the elementAt() method 2. In ArrayList, it is done using the get() method. 3. ArrayList has no default size while vector has a default size of 10.?4. ArrayLi...
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Is JVM platform dependent?
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What is the difference between abstract and final classes?
sampra
- Feb 15th, 2008
Abstrct class has some method who has no body so we cant create object for that whaere as fianal class is lik constant class we cant change the class ie we cant extend the final class so if we have to make anny class as immutable then declare class as final
sujatham
- Aug 10th, 2007
1. Abstract class cannot be instatianted.But final class can be instatiated.2. Abstract class must be etended. But final class cannot be extended.3. If we declare class as final,then that class canno...
Core Java Interview Questions
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