Answer Posted / sivasubramanian.k

(1)A declaration tag places a variable definition inside
the body of the java servlet class. Static data members may
be defined as well. Also inner classes should be defined
here.
Example:<%! int serverInstanceVariable = 1; %>

Declaration tags also allow methods to be defined.

<%!
/**
* Converts the Object into a string or if
* the Object is null, it returns the empty string.
*/
public String toStringOrBlank( Object obj ){
if(obj != null){
return obj.toString();
}
return "";
}
%>

(2)A scriptlet tag places the contained statements inside
the _jspService() method of the java servlet class.

<% int localStackBasedVariable = 1;
out.println(localStackBasedVariable); %>

(3)An expression tag places an expression to be evaluated
inside the java servlet class. Expressions should not be
terminated with a semi-colon .

<%= "expanded inline data " + 1 %>

(4)Also we can use the following tag to give comments in
jsp:

<%-- give your comments here --%>

What are java packages?

1016

---

Is java a security risk?

1022

---

Name component subclasses that support painting in java programming?

1045

---

How many types of the indexof method are there for strings?

955

---

What are the advantages of packages in java?

1545

---

What is class and object in java?

988

---

Explain wait(), notify() and notifyall() methods of object class ?

1014

---

Does list allow duplicates in java?

920

---

Which java version is latest?

1007

---

What is collection api?

1028

---

What is implicit object in java?

1057

---

What does singleton mean in java?

984

---

What’s the difference between callable and runnable?

1081

---

When the constructor of a class is invoked?

1016

---

What is the difference between a constructor and a method?

1225

---