EJBs can be of the following type(s)
None of the above
Entity Bean
Session Bean
Message-driven bean
All of the above
Correct Answer :
D. All of the above
Related Questions
The expression (x == y && a<b) is true If either x == y is true or a<b is true.
True
False
An EJB is a server-side component that encapsulates the business logic of an application
True
False
JdbcOdbcDriver is an object of Object class
True
False
The check box group class is a subclass of the component class.
True
False
The break statement is required in the default case of a switch selection structure.
True
False
The keywords reserved but not used in the initial version of Java re:
Synchronized
Boolean
union
goto
The length of a string object 's1' can be obtained using the expression s1.length.
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
A string object can not be modified after it is created.
True
False
An individual array element that is passed to a method and modified in that method will contain the modified value when the called method completes execution.
True
False
Which of the following command lines options generates documentation for all classes and methods?
-protected
-public
-private
-encoding
forName() is a static factory method
True
False
A catch can have comma-separated multiple arguments.
True
False
Message-Driven beans act as a listener for the Java Message Service API, processing messages synchronously
True
False
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
Two methods cannot have the same name in Java.
True
False
When we invoke repaint () for a Component, the AWT invokes the method:
draw()
update()
show()
paint()
It is perfectly legal to refer to any instance variable inside of a static method.
True
False
The use of protected keyword to a member in a class will restrict its visibility as follows:
Visibility only in the class and its subclasses in the same package.
Visibility only inside the same package.
Visibility in all classes in the same package and subclasses in other packages.
Visibility only in the class where it is declared.
Any class may be inherited by another class in the same package.
True
False
Any method in a supper class can be over ridden in its subclass.
True
False
A package is a collection of
classes
interface
editing tools
classes and interfaces
Which of the following statements are valid array declarations?
int number();
float average[];
double[] marks;
counter int[];
Every call to wait has a corresponding call to notify that will eventually end the wafting.
True
False
Which of the following are not keywords?
NULL
Implements
Protected
None of the above
Which of the following methods belong to the String class?
length()
compareTo()
substring()
all of the them
In the code below, what data types the variable x can have?
byte b1 = 5;
byte b2 = 10;
x = b1 * b2;
int short
Which exception is thrown by the read() method of InputStream class?
IOException
FileNotFoundException
ReadException
None 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
Every method of a final in class is implicitly final.
True
False