In order to connect to a database through java program we must create _______-
Connection, Statement, ResultSet
Connection, ResultSet
Statement< ResultSet
Connection, Statement
Correct Answer :
D. Connection, Statement
Related Questions
forName() is a static factory method
True
False
Any method in a supper class can be over ridden in its subclass.
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.
Throwing an exception always causes program termination.
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
A final class may not have any abstract method.
True
False
A catch can have comma-separated multiple arguments.
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
A panel can not be added to another panel.
True
False
When present, package must be the first no comment statement in the file.
True
False
Which of the following statements are valid array declarations?
int number();
float average[];
double[] marks;
counter int[];
We can over load methods with differences only in their return type.
True
False
If a=10 and b= 15, then the statement x =(a>b)?a:b; assigns the value 15 to x.
True
False
It is perfectly legal to assign a subclass object to a supper class reference.
True
False
Which of the following represent legal flow control statements?
break;
break();
continue(inner);
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
Objects are passed to a method by use of call-by-reference.
True
False
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)
Two methods cannot have the same name in Java.
True
False
A Java monitor must either extend thread class or implement Runnable interface.
True
False
Which of the following control expressions are valid for an if statement?
an integer expression
a Boolean expression
either A or B
Neither A or B
It is perfectly legal to refer to any instance variable inside of a static method.
True
False
The setBackground() method is part of the class
Applet
Component
Container
Object
Session bean
Represents a single client inside the application server
Can not be shared
Is not persistent
Satisfies all of the above conditions
Any class may be inherited by another class in the same package.
True
False
With javadoc, which of the following denotes a javadoc comment?
//#
/*
/**
//**
Which of the following command lines options generates documentation for all classes and methods?
-protected
-public
-private
-encoding
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
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.
Which of the following methods can be used to draw the outline of a square?
fillRect()
drawLine()
drawString()
all of the above