The setBackground() method is part of the class
Applet
Component
Container
Object
Correct Answer :
B. Component
Related Questions
JdbcOdbcDriver is an object of Object class
True
False
A panel can not be added to another panel.
True
False
All methods in an abstract class must be declared abstract.
True
False
A constructor must always invoke its supper class constructor in its first statement.
True
False
An EJB is a server-side component that encapsulates the business logic of an application
True
False
If m and n are int type variables, what will be the result of the expression
'm % n' when m = -14 and n = -3?
4
2
-2
-4
A Java monitor must either extend thread class or implement Runnable interface.
True
False
A variable declared inside the for loop control can not be referenced out side the loop.
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 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");
When the string objects are compared with ==, the result is true If the strings contain the same values.
True
False
When we invoke repaint () for a Component, the AWT invokes the method:
draw()
update()
show()
paint()
Declarations can appear anywhere in the body of a Java method.
True
False
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
The programmer must explicitly create the system .in and system .out objects.
True
False
Which of the following statements are true?
UTF characters are all 24 bits.
Reader class has methods that can read integers and floats.
Unicode characters are all 16 bits.
all of the above
Throwing an exception always causes program termination.
True
False
We can over load methods with differences only in their return type.
True
False
Any method in a supper class can be over ridden in its subclass.
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
Give file is a file object, which of the following are legal statements to create a new file.
file.create();
FileOutputStream fos=new FileOutputStream(file);
FileInputStream fis=new FileInputStream(file);
all of the above
Which of the following methods can be used to change the size of a
size() *
resize()
component
dimension()
setSize()
size()
The import statement is always the first no comment statement in a Java program files.
True
False
For all insert, update, delete, query operations on a database, ResultSet object creation is mandatory.
True.
False.
The name of the RMI compiler is ___________
rmicom
rmic
jrmi
none of the above
Which of the following will produce a value of 22 if x=22.9:
Ceil(x)
Round(x)
Rint(x)
Abs(x)
forName() is a static factory method
True
False
Objects are passed to a method by use of call-by-reference.
True
False
In RMI before running the client program we must start RMI Registry.
True.
False.