Message-Driven beans act as a listener for the Java Message Service API, processing messages synchronously
True
False
Correct Answer :
B. False
Related Questions
If a=10 and b= 15, then the statement x =(a>b)?a:b; assigns the value 15 to x.
True
False
To delete a file, we can use an instance of class file.
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
The modulus operator (%) can be used only with Integer operands.
True
False
class.forName(...) creates an instance of java ODBC driver
True
False
Which of the following will produce a value of 22 if x=22.9:
Ceil(x)
Round(x)
Rint(x)
Abs(x)
The name of the RMI compiler is ___________
rmicom
rmic
jrmi
none of the above
Java always provides a default constructor to a class.
True
False
The break statement is required in the default case of a switch selection structure.
True
False
All methods in an abstract class must be declared abstract.
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.
A static class method can be invoked by simply using the name of the method alone.
True
False
The concept of multiple inheritance is implemented in Java by
extending two or more classes
extending one class and implementing one or more interfaces
all the above
Which javadoc tag is used to denote a comment for methods parameters?
@method
@parameter
@argument
@param
DataInput is
An abstract class defined is java.io.
A class we can use to read primitive data types.
An interface that defines methods to open files.
An interface that defines methods to read primitive data types.
The keywords reserved but not used in the initial version of Java re:
Synchronized
Boolean
union
goto
When the string objects are compared with ==, the result is true If the strings contain the same values.
True
False
Consider the following code snippet:
try
{
int x=0; int y=50/x;
System.out.println("Division by zero");
}
catch(ArithmeticException e)
{
System.out.println("catch block");
}
What will be the output?
{
int x=0; int y=50/x;
System.out.println("Division by zero");
}
catch(ArithmeticException e)
{
System.out.println("catch block");
}
Error. Won't compile
Division by zero
Catch block
Division by zero catch block
Message-Driven beans act as a listener for the Java Message Service API, processing messages synchronously
True
False
In RMI before running the client program we must start RMI Registry.
True.
False.
It is an error to catch the same type of exception in two different catch blocks associated with a particular try block.
True
False
What does the following line of code do?
TextField text=new TextField(10);
Creates text object that can hold 10 rows of text.
Creates text object that can hold 10 columns of text.
Creates the object text and initializes it with the value 10.
The code is illegal.
A constructor must always invoke its supper class constructor in its first statement.
True
False
Two methods cannot have the same name in Java.
True
False
With javadoc, which of the following denotes a javadoc comment?
//#
/*
/**
//**
The programmer must explicitly create the system .in and system .out objects.
True
False
In order to connect to a database through java program we must create _______-
Connection, Statement, ResultSet
Connection, ResultSet
Statement< ResultSet
Connection, Statement
What is error in the following class definitions?
abstract class xy {
abstract sum(int x, int y) {
}
}
abstract sum(int x, int y) {
}
}
class header is not define properly
constructor is no defined
method is not defined properly
no error
Which of the following are the wrapper classes?
Random
Vector
Byte
all of the above
In a single Servlet class we can use____________
doGet(...) method only
doPost(...) method only
doGet(...) method and doPost(...) method both at a time.
Either 'a' or 'b'