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What is the advantage of mvc-2 over mvc-1?
PriyankN
- Mar 6th, 2011
The question itself is wrong. It should have been difference between Model1 and Model2. There is nothing called MVC1 in actual. The term MVC itself stands for Model-View-Controller, which clearly sepe...
paromita
- May 23rd, 2009
In MVC 1, the view is not separate from the controller... ie the presentation logic as well as the business logic is written in the same place. However, in MVC 2, the view is separate from the control...
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Is servlet is thread-safe?
PriyankN
- Mar 27th, 2011
Servlet is not thread safe, but that is because of the class/instance variables. So care must be taken to provide synchronized access to class/instance variables. Synchronizing entire service or doGet/doPost methods is bad and should be avoided.
Neha
- Nov 18th, 2007
Servlet is not thread safe by itself but u can make it thread safe by synchronizing the particular line's of service method.
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Is WebSphere 6.0 and RAD 6.0 same?
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ahamza59- Member Since Jun-2009 | Jun 4th, 2009
They are the same app, just with 'Rational(tm)' branding instead of 'IBM(tm)' branding.
WSAD has been renamed to RAD. The change in name is to reflect IBM's acquisition and integration of the Rational product line.
WSAD does not have the version 6. WSAD's last version is 5. RAD starts with version 6. It is essentially the same IDE - they are both based on Eclipse and the numbering scheme continues.
WSAD 5 was based on the Eclipse 2.x series, whilst RAD 6 is based on Eclipse 3.x series.ahamza59
- Jun 4th, 2009
They are the same app, just with 'Rational(tm)' branding instead of 'IBM(tm)' branding. WSAD has been renamed to RAD. The change in name is to reflect IBM's acquisition and i...
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Explain how will you pass data from one Server(Tomcat) to another Server (WebLogic)?
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karunasagar- Member Since Jul-2008 | Jul 31st, 2008
One way of transferring data between JVMs across the network would be to use Tangosol's Coherence product (www. tangosol . com/coherence . jsp)karunasagar
- Jul 31st, 2008
One way of transferring data between JVMs across the network would be to use Tangosol's Coherence product (www. tangosol . com/coherence . jsp)
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What is the use of Marker Interface ?
Explain the purpose of Marker Interface.When there is no methods in marker interface then what is the use of implementing it?
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jasmin sheeba rani- Member Since Oct-2009 | Oct 6th, 2009
Marker interfaces are also called "tag" interfaces since they tag all the derived classes into a category based on their purpose. For example, all classes that implement the Cloneable interface can be cloned (i.e., the clone() method can be called on them). The Java compiler checks to make sure that if the clone() method is called on a class and the class implements the Cloneable interface.
jasmin sheeba rani
- Oct 6th, 2009
Marker interfaces are also called "tag" interfaces since they tag all the derived classes into a category based on their purpose. For example, all classes that implement the Cloneable interf...
VijayAravind
- Sep 18th, 2009
Marker Interface is a Java interface which doesnt have any methods in it. Marker Interfaces are Serializable, clonable, Singlethreaded model, Event listener. Marker interfaces are implemented by the class or its super class inorder to add some functionality.
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What is the difference between EJB3.0(CMP) and Hibernate
kumarsamba
- Dec 5th, 2009
The basic difference is EJB needs an application Server for its implementation whereas Hibernate needs only a web server for its implementation.
krishna_ballabh
- Jul 31st, 2009
EJB3.0 does provide the POJO features for ORM in JPA as well as all features of older version, in other word we can say that Entity Bean is no longer in EJB, to provide the same, specification is prov...
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How Inheritance interacts with encapsulation?
Ashwinshenoy7
- May 8th, 2011
There are two parts in this answer PART 1 : General explanationPART 2 : OOPS concept ( JAVA )PART 1 :1) Inheritance is the process by which one object ( Child class or also known as sub class ) a...
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Implement Very Large Queue
Suppose you have a very large queue, and you need to do a insert and delete on the queue. Since the queue is very large , you cannot keep the entire queue in the memory. How do you go about implementing such a condition?How do you go about inserting and deleting elements from that queue if you cannot keep the queue in the memory?
Ashwinshenoy7
- May 8th, 2011
Problems with large Queue :1) Space.2) Inserting and deleting.3) Time to perform operations.4) Additional cost.There are few ways to implement very large queues:1)Using flat-files:A "flat file&qu...
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What is design by contract? Explain the assertion construct?
Ashwinshenoy7
- May 8th, 2011
In every class or method, there will be a calling function and a called function.When ever a function(calling function) calls another function(called function), the called function is expected to repl...
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What is the difference between hash map and hash table?
swatinanu
- Aug 8th, 2011
Hash map is basically a collection API which is used to save data in sorted order avoiding duplicates. where hash table herits Object class. Hashtable is synchronized, whereas HashMap is not. This m...
Abid
- Jul 13th, 2011
The HashMap class is roughly equivalent to Hashtable, except that it is unsynchronized and permits nulls. (HashMap allows null values as key and value whereas Hashtable does not allow). HashMa...
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Why do we Typecast FormBean object with ActionForm in execute(...,...,...,..) method in Struts?
Public ActionForward execute(ActionMapping am,ActionForm af,Req,Res)
{
Myfornbean mf=(Myformbean)af;
//why we are typrcasting here -
What is DAO?
amreenkhader
- Jan 20th, 2012
DAO decides to recieve the appropriate application from java and implemeting it a runtime...during execution..
chetan.nellekeri
- Apr 18th, 2011
DAO is Data Access Object.This is a pattern is used in most of the project throughout the industry.This class is the main medium between JAVA and JDBC.
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Explain the concept of design in a project and its life cycle
amreenkhader
- Jan 20th, 2012
Projects needs to be designed carefully which must be meaningful according to the readers and learners..It must be planned in such a way so that it can be followed easily a project should contain a meaninngful data related to topic prescribed
Ashwinshenoy7
- May 8th, 2011
Let me start with an example.Consider a development projectInitiation : Requirements gatheringPlanning : From the scratch to the end product based of the needs and requirements provided.Design: Once t...
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What is diffrence between java and java script?
amreenkhader
- Jan 20th, 2012
Java is the basic object oriented programmng language and Java script can be used in style sheets making and in HTML documentation
mani.sivapuram
- Feb 23rd, 2011
java-script is also same as like java only.But java is used in server side scripting and the javascript is used in client side scripting. I will say a real time scenario here consider the normal user...
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What is bit twiddling in Java?
Lokesh M
- Feb 10th, 2012
Bit Twiddling was used in earlier days for efficiency. It is a technique used for bit manipulation. Java bitwise and bit shift operators such as NOT, AND, OR, XOR, LEFT-SHIFT, RIGHT-SHIFT, UNSIGNED-RI...
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What is the usage of abstract method?
Lokesh M
- Feb 10th, 2012
Abstract classes used to implement polymorphism. Abstract class allows additional method declaration in the class.
Please read detailed discussion here http://www.geekinterview.com/question_details/19145
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Difference between java.sql.Date and java.util.Date
dineshxp
- Mar 19th, 2012
Java.util.date is used to show date and time of the system
java.sql.date is used to show the date of retrieved data from database and also it shows entered date to databaseNarendraKumar
- Mar 6th, 2012
Explanation: public class ((java.util.Date extends java.lang.Object)) implements java.io.Serializ able,java.lang.Cloneable,java.lang.Comparable java.sql.Date extends the java.uti.Date cls obj so jav...
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Log4J
How would we use log4J in our applications? Is it necessary to use log4J applications in our web application?
nabi_alam
- Mar 30th, 2012
To implement log4j in the web application there are different way. 1.we have to write a common logger class. 2.we have to configure corresponding class in web.xml and 3. we have to configure the prop...
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Application Security
How will you make sure to develop Java/J2EE projects/applications secured from hackers?Justify how Java projects are more secured than other languages?
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Design Pattern
What design pattern are available for J2EE?
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