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Java J2EE Interview Questions
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Hello, My project requirement is like I need to create a web page using MVC pattern. I hava a bean class, jsp page, servlet, service and dao. My jsp has two fields. One is dropdown list. The option values has to get populated from the database table. The other one is a text box and its value has to come from database table. As of now I have defined the fields in bean class, got the values from database using arraylists in dao class and I called this from service class. Can anyone please tell me the workflow of how the servlet will get this arraylist and populate the arraylist values as dropdown options in jsp page? Also I would like to know the role of bean class in MVC pattern? Thanks in advance!

 1834

please write java program of instanceOf keyword implementation

TCS,

2 3761

Hi i am creating desktop application in that i want calling to mobile number. i have java telephone api (JTAPI) but i dont understand how it configure & use plese help me

 1362

How to extract HashMap values?

Marlabs,

5 9930

what is the main reason for developing struts? what is advantages over Basic MVC architecture based JAVA Application?

 1 4131

How to Create A Wapper Class in core Java and Why are Use in java?

Amdocs,

2 5813

1.can we transfer a request from one struts application to another struts application? 2. how many types of action servlets r there what r they

TCS,

2757

Difference between hashCode() & equals()?

HCL,

3 6992

Write a program for Sum of the digits for a given number Ex: suppose user entered Number is 1214, It should calculate the above number like 1+2+1+4 = 8

Amazon,

2 6319

Write a program to display numeric value in reverse order. Ex: I have given a number like 7584, It should display in reverse order like 4857.

 6 7118

write a program, when a statement is entered, it should display in reverse order. Ex: Statement is "I am writing program in reverse order". Output should be like "order reverse in program writing am I".

 4 9621

What is the reason that multiple inheritance is not possible in java??

 1 2903

Why are the destructors for base class and derived class called in reverse order when the program exits

HCL,

1709

Definition for connection pooling?

 3 4178

abstract class Demo { public void show() { System.out.println("Hello I am In show method of Abstract class"); } } class Sample extends Demo { public void show() { super.show(); System.out.println("Hello I am In Sample "); } } public class Test { public static void main(String[] args) { //I WANT TO CALL THE METHOD OF BASE CLASS IT IS POSSIBLE OR NOT CAN WE USE SCOPE RESOLUTION OPERATOR TO CALL OR JAVA NOT SUPPORTED THAT :: OPERATORE } }

3 12796

Un-Answered Questions { Java J2EE }

What is spring api?

153

What is bytecode in java ?

608

What is the difference between int and integer in java?

516

What does @controller do in spring?

171

Explain a situation where finally block will not be executed?

576




Explain the use of http ?

676

What is sessionfactory in hibernate?

151

difference between mqsc commands and control commands?

475

What is not thread safe?

495

Explain portal architecture.

478

What is an array length?

500

Which number is denoted by leading zero in java?

812

What is time complexity java?

538

Do you need @override?

156

How concurrent hashmap works?

613

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