SQL:
1. Sql query::::::::
Sum of the sale
for particular date?
1. Product =>
name, prod_id,
2. Invoice =>
prod_id, rate, invoice date
2. $seeion?
3. Hint?
4. stored procedure?
5. Function?
6. Trigger?
7. Cursor type?
JAVA:
- What are the collections using?
- How do avoid duplicate in collection?
- Print the key and Value in Hashmap??????
- How to make arraylist as sync?
- How do invoke stored proc in java?
JSP:
- Implict objects?
- How load data XML/XSLs?
- JSP pre compile?
Servlet:
1.
Servlet chinning
Web services:
- How you implement the webservices.in you project
- Explain the Axis and spring based web services.
UNIX:
- Basic UNIX commands
- How set the class path
- How find the jar file missing?
Project
:
-----------
Explain
Project .And its Process Flow
Java
-------
Oops
Concept.
What
ways are using Thread.
Which
Collection framework are you used.
ArrayList
and HashMap.
Exception
and Errors.
Exception
types with examples.
How
you handling exception in your application.
Write
code - arraylist for adding integer value 1.
How
you handle nullpointer exception .
Jsp
and Servlet:
----------------------
1)
Three files are used .How to files are included in jsp .
How you get dynamic values. (Static and Dynamic Includes ).
2)
Difference between jsp and servlet.
3)
Custom tags in jsp
Struts:
---------
1)
Did you written user-defined ActionController
2)
Struts Flow
3)
Dispatch and Lookup Dispatch Action
4)
Tiles and Validator framework
5)
Bean Write usage
6)
What are the taglibs in struts.
7)
Condition type which taglibs we can use.
8)
Prepared Statment and Callable Statement
9)
How you call the Procedure and how you set anf get the values.
SQL:
-------
1)
What type of joins available.
2)
Explain self join.And what condition it will use.
3)
Difference of Inner join and self join.
4)
Explain Left outer join.
5)
Write query for this condition.
Two tables(dept,employee) having empid,empname, dept(dept table) and dept ='X'.
6)
Explain Procedure and Functions.
7)
Write prototype for Procedure and Functions.
1) About Current project with Roles &
Responsibilities
2) How implementation phases are carried
out at on-site?
3) How support phases are carried out at
off-shore?
4) How to get Hibernate Session
instance?
5) What is the difference between openSession
and getCurrentSession?
6) What is the difference between get/load
and createCriteria?
7) Why motivation for Struts and why not
only Servlets/JSP?
8) What is the Life Cycle of a Servlet?
9) When destroy method gets called?
10) How to call destroy method
explicitly?
11) Any challenges faced in your
experience?
1. Roles
in current project
2. Difference
between Interface & Abstract Class
3. Reflection
4. Design
Patterns used in your projects
5. Major Components of Struts
6. Web
services project done in Ford, told
about it.
7. How
to generate data in XML file
8. In
a web application , how the performance
is ?
9. Outer
Joins in Oracle
10. DECODE
in Oracle
11. Locks
in Oracle
12. Explain Deadlock
13. Have
you seen log files.
14. How
will you resolve Null pointer Exception
1. What classes have you used in Struts recently?
Dispatch action class explained.
2. Can you explain request response
workflow in struts.
Explained in detail.
3. How did you do validation in your
project?
Validation framework explained.
4. Have you used the validate method in
struts?
Explained.
5. Can you name some abstract classes in
java?
If you don't remember just explain the
concept of abstract classes.
Explained.
6. What is an interface?
Explained
7. Explain the concept of polymorphism and
encapsulation.
Explained in detail.
8. Do you know about optimistic locking in
databases?
I have come across the term but not used it
in projects.
9. What is lazy loading?Explained.
10. Have you used ajax
Explained.
11. How comfortable are you with SQL?
Comfortable in writing simple queries and
also queries with joins.
SUPER-G
1. Whar are the Changes we need to make
for making n application struts enabled.
We need to make changes to web.xml
inlude struts config xml etc
2. explain the struts flow
3. whats the difference between action
and Lookup dispatch action
4. what are the ways in which you can
create an object
5. how write a code, which will should
be called when ever an object is created
6. what are the call beck methods in
Srtuts form
7. explain singleton pattern
8. how to include i18n in struts
9. where to mention the resource bundle
file name in struts
10. what is the default scope of the
form bean in struts, how to change it
11. how dou write java code in JSP
12. is it possible to write java method
in JSP
13. how to include a custom tag in to ur
14. how to set buffer size of a jsp,
what is the significance of this
1. Can I have more than one
struts-config.xml file for a single Struts application?
Yes we can.. for example..
<init-param>
<param-name>config</param-name>
<param-value>/WEB-INF/struts-fndt-config.xml,/WEB-INF/struts-plugin-config.xml,/WEB-INF/struts-app-config.xml</param-value>
</init-param>
2.Have you used Display Tag?
3.How Can you change the Value of a
Certain Column(like Formatting Et...) in a Display table, on the Fly?
We need to use a Table
decorator.
4.What is difference between
LookupDispatchAction and DispatchAction?
The difference between
LookupDispatchAction and DispatchAction is that the actual method that gets called
in LookupDispatchAction is based on a
loookup of a key value instead of specifying the method name directly.
5.What is the difference between
ForwardAction and IncludeAction?
The difference is that you need
to use the IncludeAction only if the action is going to be included by another
action or jsp. Use ForwardAction to
forward a request to another resource in your application, such as a
Servlet that already does business logic processing or even another JSP
page.
6. Explain about token feature in
Struts
Tokens are used to check for
invalid path for by the uer:
1) if the user
presses back button and submits the same page
2) or if the user
refreshes the page which will result to the resubmit of the previous action and
might lead to unstabality..
To solve the abv probs we use tokens
1) in previous
action type saveTokens(HttpServletreuest)
2) in
current action check for duplication bu
if(!isValidToken())
7. Default FormBean Scope in Struts and
How to change the Scope?
Default Scope is Request and we
can Change it struts Config 8. How do you Configure Validaor framework
<Descriptive Answer>
9.how do you perform javascript
validations struts 10. how to use i18n in struts 11. what the custom tags you
have used
SQL:
1. Explain Joins, type of join
2. purpose of Sub querys
3. Explain what is ORM (any not
specifically toplink)
4. what are the aggregate Function you
have used?
min, max, sum,avg etc
5. what is the use of NVL decode
functions
1) When a user submitted a jsp page. that page having (attribute of )action="login.do". the container will call to WEB.XML. in that web.xml thert is two section servlet And servlet mapping 2) In servlet mapping it find *.do in the url-pattern. if it found to take the name of servlet. and check the corresponding class. in the servlet section. that class is ActionServlet.3) ActionServlet is the controller of Struts module architecture. in Action servlet having the service method. in that method we create RequestPrecessor class instance4) Service(req,res)RequestPrecessor rp = new RequestPrecessor();5) We call a process method of RequestProcessor class through the instance rp.process(req,res)6) In the request processor class have the process method with the parameter of req,res. then it has 1 if condition in this class. that condition return always true. because that is dummy method.7)Inside that condition ther is 6 steps are processing a)Create a action mapping instance in the "Struts-Config.xml". it will kept all details of the action mapping path, value, type forward, validation=true/false, input ="*.jsp" etc these r created instance b)Then it will create Form class instance before it check the name of action mapping and form name are coincidence or not if it same it will create form instancec)Then it will go to ActionMapping instace the ris mention or not the validate =true/fale if false it will not execute the this step else it will execute this step.d) Then it will create action instance e) Next it will take four parameters of execute Method it will return ActionErrors instance. if it is not empty. it will go to error page other wise it will got to corresponding page. else if it is empty if will go further and display corresponding value of page in jsp view.This is struts flow.
1. Roles
in current project
2. Difference
between Interface & Abstract Class
3. Difference
between implements & Extends
4. What
ways we can use Thread and which is the best one?
5. Difference
between request processor and request dispatcher
6. Explain
about internatiolization concept in struts and how do we achieve this concept
in struts
7. How do you handle the exceptions in struts?
8. Explain
about Ajax
9. Explain
about validator plug in frame work in struts? How do you handle the validations
in struts?
10. What
are the design patterns’ you are familiar and explain one of the design pattern
in detail
11. What is the sequence diagram and class
diagram?
12. How
do you rate your self as a developer?
13. What
are your strengths
14. Would
like to learn any technologies?
15. What
was the toughest switchwation you have faced in your previous project?
1.
What are oops concepts?
2.
Write a program to reverse the array?
A[]={ 1,2,3,4,5,6,7} with less no of
iteration.
3.
How can we define the capacity of arraylist? --- ensureCapacity().
4.
Overriding concept.
Class A {
int i=10;
Public void test () {
System.out.println(“super class”);
}
}
Class
B extends A {
Int
i=20;
Public void test () {
System.out.println(“sub class overridden
method”);
}
Public
void ride(){
System.out.println(“sub class method”);
}
}
Class
c{
Public
static void main(String, args[])
{
A a=new A();
B b=new B();
A c=new B();
B d=new A();
a.test();
b.test();
c.test();
System.out.println(“a.i”+a.i);
System.out.println(“b.i”+b.i);
System.out.println(“c.i”+c.i);
}
}
}
5.
Difference between ArrayList Vs Vector?
6.
How do you handle the exceptions in struts?
7.
Explain about Ajax
8. Explain about validator plug in frame
work in struts? How do you handle the validations in struts?
9. What are the design patterns’ you are
familiar and explain one of the design pattern in detail
10. What is struts flow?
11. why string is made as immutable?
12. String str=”shabarish”;
String str1=”shabarish”;
Str=”shabarish soore”;
Str==str1 ?
true or false
Str
is changed to “shabarish soore” then what will happen?
13. Explain about stack memory and heap memory?
14. explain
synchronization and serialization?
15.
what for transient and volatile keyword used?
16.
How you will synchronize the variable in a class?
17.
what is servletconfig and servletcontext?
18.
Struts Architectural flow?
19.
custom tags?
20.
comparator concept?
Ex: if you are having a class testing and
variables f1,f2,f3 and objects a,b,c? how youe will sort the objects based on
value of f2?
21. It is possible to call a file in
server2 from server1 ? ---NO
22. javascripts concepts?
23. whats the difference between action and
Lookup dispatch action?
|
Feature
|
Struts 1
|
Struts 2
|
|
Action classes
|
Struts
1 requires Action classes to extend an abstract base class. A common problem
in Struts 1 is programming to abstract classes instead of interfaces.
|
An
Struts 2 Action may implement an Action interface, along with
other interfaces to enable optional and custom services. Struts 2 provides a
base ActionSupport class to implement commonly used interfaces. Albeit, the
Action interface is not required. Any POJO object with a execute signature can be used as
an Struts 2 Action object.
|
|
Threading Model
|
Struts
1 Actions are singletons and must be thread-safe since there will only be one
instance of a class to handle all requests for that Action. The singleton
strategy places restrictions on what can be done with Struts 1 Actions and
requires extra care to develop. Action resources must be thread-safe or
synchronized.
|
Struts
2 Action objects are instantiated for each request, so there are no
thread-safety issues. (In practice, servlet containers generate many
throw-away objects per request, and one more object does not impose a
performance penalty or impact garbage collection.)
|
|
Servlet Dependency
|
Struts
1 Actions have dependencies on the servlet API since the HttpServletRequest
and HttpServletResponse is passed to the executemethod when an Action is invoked.
|
Struts
2 Actions are not coupled to a container. Most often the servlet contexts are
represented as simple Maps, allowing Actions to be tested in isolation.
Struts 2 Actions can still access the original request and response, if
required. However, other architectural elements reduce or eliminate the need
to access the HttpServetRequest or HttpServletResponse directly.
|
|
Testability
|
A
major hurdle to testing Struts 1 Actions is that theexecute method exposes the
Servlet API. A third-party extension, Struts TestCase, offers a set of mock
object for Struts 1.
|
Struts
2 Actions can be tested by instantiating the Action, setting properties, and
invoking methods. Dependency Injection support also makes testing simpler.
|
|
Harvesting Input
|
Struts
1 uses an ActionForm object to capture input. Like Actions, all ActionForms
must extend a base class. Since other JavaBeans cannot be used as
ActionForms, developers often create redundant classes to capture input.
DynaBeans can used as an alternative to creating conventional ActionForm
classes, but, here too, developers may be redescribing existing JavaBeans.
|
Struts
2 uses Action properties as input properties, eliminating the need for a
second input object. Input properties may be rich object types which may have
their own properties. The Action properties can be accessed from the web page
via the taglibs. Struts 2 also supports the ActionForm pattern, as well as
POJO form objects and POJO Actions. Rich object types, including business or
domain objects, can be used as input/output objects. The ModelDriven feature
simplifies taglb references to POJO input objects.
|
|
Expression Language
|
Struts
1 integrates with JSTL, so it uses the JSTL EL. The EL has basic object graph
traversal, but relatively weak collection and indexed property support.
|
Struts
2 can use JSTL, but the framework also supports a more powerful and flexible
expression language called "Object Graph Notation Language" (OGNL).
|
|
Binding values into views
|
Struts
1 uses the standard JSP mechanism for binding objects into the page context
for access.
|
Struts
2 uses a "ValueStack" technology so that the taglibs can access
values without coupling your view to the object type it is rendering. The
ValueStack strategy allows reuse of views across a range of types which may
have the same property name but different property types.
|
|
Type Conversion
|
Struts
1 ActionForm properties are usually all Strings. Struts 1 uses
Commons-Beanutils for type conversion. Converters are per-class, and not
configurable per instance.
|
Struts
2 uses OGNL for type conversion. The framework includes converters for basic
and common object types and primitives.
|
|
Validation
|
Struts
1 supports manual validation via a validatemethod on the ActionForm, or through
an extension to the Commons Validator. Classes can have different validation
contexts for the same class, but cannot chain to validations on sub-objects.
|
Struts
2 supports manual validation via the validate method and the XWork
Validation framework. The Xwork Validation Framework supports chaining
validation into sub-properties using the validations defined for the
properties class type and the validation context.
|
|
Control Of Action Execution
|
Struts
1 supports separate Request Processors (lifecycles) for each module, but all
the Actions in the module must share the same lifecycle.
|
Struts
2 supports creating different lifecycles on a per Action basis via
Interceptor Stacks. Custom stacks can be created and used with different
Actions, as needed.
|
1.
Exception handling. What is Error and Exception?
2.
design pattern used in previous project.
3.
What is Model in Struts.
4.
Traceability matrix
5.
Threads - There are two synchronized method in a class. Can two seperate
threads run the two methods at the same time.(Thread 1 runs method 1 and thread
2 runs method 2?
6.
How will you display the message you are nth user to this website?
7.
Difference between forward and sendRedirect()?
8.
what are different type of locks in Threads?
9.
there is a static class variable in your class will it be affected by
threading?
10.
how will you make your jsp implement singlethreadmodel?
11.
other than doGet and doPost what are other methods in Servlet
12.
how will you make a servlet single threaded?
13.
Explain about ORM tool used in your project? Hibernate or ibatis?
14.
Dispatch action and LookupDispatchAction difference?
15.
Joins
16.
implicit objects in jsp
17.
difference between page and pageContext.
18.
servlet life cycle? What does the destroy method do?
19.
what is the implicit object for servlet context.
20.
explain tiles taglib in struts. if in a template page when we use tiles and one
of the jsp page is missing will the page be rendered.
21.
Explain Cursors
22.
Have you done code review? Is there a standard code review document shared
across different projects or each project has its own code review checklist?
23.
Have you done performance tuning in code as well as SQL? How will you
performance tune your application?
1)Explain
final, finalize() and finally?
2)What
is a static block and how should I use it?
3)Difference
between statement and Prepared Statement?
4)Difference
between forward and sendredirect?
5)Difference
between dispatch action and lookup dispatch action?
6)How
do you invoke servlet config?
7)Expalins
joins in oracle?
8)Expalin
the validatory framework in struts?
9)what
is servlet chaining?
10)expalin
Design patterns which you have worked ?
11)What
is lazy loading and aggressive loading?
12)forcefully
how do you invalidate a session object?
13)what
is cloning? what are the ways of cloning?
14)
In a simple application you are getting a 400 error to resolve what you will
do?
15)Is
it a advantage or burden to have a hibernate in a project
1.
Tell
me a case where you demonstrated excellent problem solving skills
2.
Tell
me a few areas you have gained knowledge in the last six months
3.
How
do you learn these skills?
4.
What do you do for technical inspection
5.
Explain
how transaction is handled in struts
6.
Difference
between actionservlet and request processor?
7.
Explain
garbage collection in java?
8.
Do
you have to manage memory specifically in java?
9.
How do you manage memory in java?
10.
Difference
between extends and implement
11.
How
do you create deployable components
12.
What
is a join? Types of join?
13.
What
is deadlock in db?
14.
What
is ORM?
15.
Which
UML diagrams have you created? Which project?
16.
Did
you create all the diagrams or just a few of them?
17.
Design
patterns?
18.
When
do you use singleton class? – when we need only one instance
19.
JaxP?
I want JaxP with reference to web services – not answered.
20.
What
is synchronization in Java
Anuja
– general questions:
22.
What
are your personal strengths and weakness?
23.
Have
you worked with business customers directly
24.
Do
you think your business customer was tough or easy going?
25. Do you have conflicts with your co-workers?
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