A package is a collection of
classes
interface
editing tools
classes and interfaces
Correct Answer :
D. classes and interfaces
Related Questions
Which of the following command lines options generates documentation for all classes and methods?
-protected
-public
-private
-encoding
Any class may be inherited by another class in the same package.
True
False
The modulus operator (%) can be used only with Integer operands.
True
False
The setBackground() method is part of the class
Applet
Component
Container
Object
Which of the following methods can be used to draw the outline of a square?
fillRect()
drawLine()
drawString()
all of the above
The default case is always required in the switch selection structure.
True
False
Connection, Statement are interfaces and ResultSet is a class.
True.
False.
JdbcOdbcDriver is an object of Object class
True
False
executeUpdate(------------) returns ___________
Nothing
Returns a ResultSet object
Returns an integer value to show the no. of updated rows
None of the above.
Which of the following are keywords?
integer
default
Boolean
Object
Servlet can have ___________
get method and post method
get method or post method
Either of the above
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
When we implement an interface method, it should be declared as public.
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");
Every call to wait has a corresponding call to notify that will eventually end the wafting.
True
False
Which exception is thrown by the read() method of InputStream class?
IOException
FileNotFoundException
ReadException
None of the above
When the string objects are compared with ==, the result is true If the strings contain the same values.
True
False
putValue(...) method takes _____________________-
Two arguments of object type
First one is of a character type and second one is of an object type
First one is of an object type and second one is of a character type
None of the above.
When we invoke repaint () for a Component, the AWT invokes the method:
draw()
update()
show()
paint()
Throwing an exception always causes program termination.
True
False
The check box group class is a subclass of the component class.
True
False
Every method of a final in class is implicitly final.
True
False
It is an error if a class with one or more abstract methods is not explicitly declared abstract.
True
False
class.forName(...) creates an instance of java ODBC driver
True
False
The break statement is required in the default case of a switch selection structure.
True
False
We would like to make a member of a class visible in all subclasses regardless of what package they are in. Which one of the following keywords would achieve this?
private
protected
public
private protected
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
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
Frames and applets cannot be used together in the same program.
True
False