Every method of a final in class is implicitly final.
True
False
Correct Answer :
A. True
Related Questions
It is perfectly legal to assign a subclass object to a supper class reference.
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 static class method can be invoked by simply using the name of the method alone.
True
False
Any method in a supper class can be over ridden in its subclass.
True
False
Which of the following represent legal flow control statements?
break;
break();
continue(inner);
all of the above
We can over load methods with differences only in their return type.
True
False
Which of the following methods can be used to change the size of a
size() *
resize()
component
dimension()
setSize()
size()
If you want to assign a value of 99 to the variable year, then which of the following lines can be used within an <applet> tags?
number=getParameter(99)
<number==99>
<param = radius value ==99>
Which of the following will produce a value of 10 if x = 9.7?
floor(x)
abs(x)
rint(x)
round(x)
The methods wait() and noify() are defined in
java.lang.Thread
java.lang.Runnable
java.lang.Object
java.lang.ThreadGroup
An EJB is a server-side component that encapsulates the business logic of an application
True
False
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'
class.forName(...) creates an instance of java ODBC driver
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
Which of the following will produce a value of 22 if x=22.9:
Ceil(x)
Round(x)
Rint(x)
Abs(x)
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)
The programmer must explicitly create the system .in and system .out objects.
True
False
JSP files creates ________________
html files
html files and java files
java files and class files
None of the above.
A method declared as static can not access non-static class members.
True
False
It is perfectly legal to refer to any instance variable inside of a static method.
True
False
Java is fully object oriented programme.
true
false
Frames and applets cannot be used together in the same program.
True
False
Which are the valid ways to create DataInputStream streams?
new DataInputStream(new File("in.dat"));
new DataInputStream(new FileInputStream("in.dat"));
new DataInputStream("in.dat");
new DataInputStream("in.data","r");
Members of a class specified as private are accessible only to the methods of the class.
True
False
Declaring a method synchronized guarantees that the deadlock cannot occur.
True
False
When we implement the Runnable interface, we must define the method
start()
init()
runnable()
run()
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 Java monitor must either extend thread class or implement Runnable interface.
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.
It is an error to have a method with the same signature in both the super class and its subclass.
True
False