In RMI before running the client program we must start RMI Registry.
True.
False.
Correct Answer :
A. True.
Related Questions
Servlet has ___________
init method
doGet(------) method
All of the above methods.
Submit button always fires doPost(...)
True
False
Which of the following are keywords?
integer
default
Boolean
Object
A package is a collection of
classes
interface
editing tools
classes and interfaces
The expression (x == y && a<b) is true If either x == y is true or a<b is true.
True
False
It is an error to have a method with the same signature in both the super class and its subclass.
True
False
A variable declared inside the for loop control can not be referenced out side the loop.
True
False
Which javadoc tag is used to denote a comment for methods parameters?
@method
@parameter
@argument
@param
The import statement is always the first no comment statement in a Java program files.
True
False
Members of a class specified as private are accessible only to the methods of the class.
True
False
A class may be both abstract and final.
True
False
If a=10 and b= 15, then the statement x =(a>b)?a:b; assigns the value 15 to x.
True
False
What is wrong in the following class definitions?
abstract class print {
abstract show();
}
class Display extends print {
}
abstract show();
}
class Display extends print {
}
Nothing is wrong
Wrong Method show() should have a return type
Wrong Methods show() is not implemented in Display
Wrong Display does not contain any members.
A string object can not be modified after it is created.
True
False
Java always provides a default constructor to a class.
True
False
executeUpdate automatically updates data because___________
auto commit is on, by default
It performs a hidden commit statement as well
Does not commit
None of the above.
When we implement the Runnable interface, we must define the method
start()
init()
runnable()
run()
Which key word can protect a class in package from accessibility by the classes outside the package?
private
protected
final
don't use any keyword at all(make it default)
A panel can not be added to another panel.
True
False
Consider the following class definitions:
class maths {
student student1;
}
class student {
String name;
}
student student1;
}
class student {
String name;
}
This code represents:
an 'is a' relationship
a 'has a' relationship
both
neither
Consider the following statements:
int x = 10, y = 15;
x = ((x < y) ? (y + x) : (y - x);
What will be the value of x after executing these statements?
x = ((x < y) ? (y + x) : (y - x);
25
15
5
Error can't be executed.
What is java -g used for?
Using the jdb tool
Executing a class with optimization turned off
To provided information about deprecated methods
Non of the above
All methods in an abstract class must be declared abstract.
True
False
EJBs can be of the following type(s)
None of the above
Entity Bean
Session Bean
Message-driven bean
All of the above
Consider the following class definition.
Class Student extends String
{
}
What happens when we try to compile this class?
Will not compile because class body is not defined
Will not compile because class is not declared public
Will compile successfully.
Will not compile because String is abstract
The keywords reserved but not used in the initial version of Java re:
Synchronized
Boolean
union
goto
Which of the following command lines options generates documentation for all classes and methods?
-protected
-public
-private
-encoding
Which of the following will produce a value of 22 if x=22.9:
Ceil(x)
Round(x)
Rint(x)
Abs(x)
We would like to make a member of a class visible in all subclasses regardless of what package they are in. Which one of the following keywords would achieve this?
private
protected
public
private protected
The check box group class is a subclass of the component class.
True
False