A final class may not have any abstract method.
True
False
Correct Answer :
A. True
Related Questions
Which of the following represent legal flow control statements?
break();
continue(inner);
return;
exit();
A string object can not be modified after it is created.
True
False
The name of a Java program file must match the name of the class with the extension Java.
True
False
Throwing an exception always causes program termination.
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
DriverManager.getConnection("jdbc:odbc:dsn_name") method does not depend on the class.forName(...) method.
True.
False.
Which of the following statements are true?
An abstract class may not have any final methods?
A final class may not have any abstracts methods.
Transient variables must be static.
all of the above
Frames and applets cannot be used together in the same program.
True
False
Consider the following statements:
int x = 10, y = 15;
x = ((x < y) ? (y + x) : (y - x);
What will be the value of x after executing these statements?
x = ((x < y) ? (y + x) : (y - x);
25
15
5
Error can't be executed.
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
Connection, Statement are interfaces and ResultSet is a class.
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 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
A package is a collection of
classes
interface
editing tools
classes and interfaces
When we implement an interface method, it should be declared as public.
True
False
The setBackground() method is part of the class
Applet
Component
Container
Object
Two methods cannot have the same name in Java.
True
False
Which of the following methods belong to the String class?
length()
compareTo()
substring()
all of the them
We can over load methods with differences only in their return type.
True
False
It is perfectly legal to refer to any instance variable inside of a static method.
True
False
The methods wait() and noify() are defined in
java.lang.Thread
java.lang.Runnable
java.lang.Object
java.lang.ThreadGroup
Which of the following methods can be used to change the size of a
size() *
resize()
component
dimension()
setSize()
size()
class.forName(...) creates an instance of java ODBC driver
True
False
Objects are passed to a method by use of call-by-reference.
True
False
Any class may be inherited by another class in the same package.
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.
What is java -g used for?
Using the jdb tool
Executing a class with optimization turned off
To provided information about deprecated methods
Non of the above
Members of a class specified as private are accessible only to the methods of the class.
True
False
A class may be both abstract and final.
True
False
A constructor must always invoke its supper class constructor in its first statement.
True
False