Friends , here is my first attempt , the SCJP book by Kathy has given me few questions , I would like to enrich it further , but time for a first cut
OOPS, Java
·
Is Java compiled or interpreted?
·
How can we declare two public classes in a Java
source file?
·
Is there a restriction on naming the source
file?
·
Give an example of code statement, where do
while and while will give different output?
·
What is the default access, if we do not specify
any access modifiers?
·
How method overloading and method overriding is different?
·
Give example of a non access modifier?
·
Why should some classes or methods be marked as
final?
·
How the abstract class is different from an
interface as far as abstract methods are concerned?
·
How garbage collection works in C# and Java ?
·
What is boxing and Unboxing ?
·
How can we implement threads ?
·
What are the different states of a thread ?
·
What is a web service? How this is related with SOAP, UDDI and WSDL?
·
What are the different ways to maintain state in
a web application , relative advantage and disadvantages ? ( Hint : Session
Variable, Cookies , Hidden Fields , Query String ) . For .Net view state is important.
·
What is MVC Architecture ?
·
Explain 3- tier Architecture ?
·
Explain Service oriented architecture
·
What is the difference between default and
package access modifier
·
Let’s say Class A has a private method called
fun() , class B extends Class A and defined fun() , what this phenomenon is
called ?
·
What is the use of Final Keyword ? Can we declare a variable as final ?
·
Is it possible to define a abstract class , with
non abstract member s?
·
When should we use an arraylist in place of an
array?
·
What is the method that can be used to traverse
an arraylist?
·
What is checked and unchecked exception ? Give example of both type of exceptions.
·
How to use
your own exception , so let’s say you are taking age as an input and you want
to throw an exception when it is less than zero, how will you achieve it ?
·
Give some
example of statements that should be put in finally ?
·
Does Java allow
multiple inheritance ? What is ‘Deadly Diamond of Death”
·
Class A
{
public
void fun()
{
}
}
Class B extend A
{
Protected
void fun()
}
Is there a problem in the above code ?
·
Give an example how polymorphism can be achieved
using method overriding?
public int foo()
{
char c = ‘c’;
return c
}
Is this code legal ?
·
What is default constructor supplied by the
compiler ? Is there any caution , that you need to follow when you create your
own constructor, will the default
constructor be supplied in the following case
class Horse()
{
void Horse ()
}
·
Which variables are in stack , which are stored
in heap ?
·
What do we mean by saying strings are immutable
objects ? what is role of ‘String
Constant Pool” . Which classed do we use to overcome the limitations of string
?
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