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
Correct Answer :
B. a 'has a' relationship
Related Questions
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.
Which of the following command lines options generates documentation for all classes and methods?
-protected
-public
-private
-encoding
class.forName(...) creates an instance of java ODBC driver
True
False
For all insert, update, delete, query operations on a database, ResultSet object creation is mandatory.
True.
False.
Every method of a final in class is implicitly final.
True
False
It is an error to have a method with the same signature in both the super class and its subclass.
True
False
A string object can not be modified after it is created.
True
False
Submit button always fires doPost(...)
True
False
A thread can make second thread ineligible for execution by calling the suspend (-) method on second thread.
True
False
A JSP file can be stored_________________
With the extension .jsp in servlets folder of the jws
With the extension .html in public_html folder of the jws
With the extension .jsp in public_html folder of the jws
None of the above.
Declaring a method synchronized guarantees that the deadlock cannot occur.
True
False
We can over load methods with differences only in their return type.
True
False
Session bean
Represents a single client inside the application server
Can not be shared
Is not persistent
Satisfies all of the above conditions
Which of the following methods can be used to change the size of a
size() *
resize()
component
dimension()
setSize()
size()
A final class may not have any abstract method.
True
False
Java is fully object oriented programme.
true
false
What is error in the following class definitions?
abstract class xy {
abstract sum(int x, int y) {
}
}
abstract sum(int x, int y) {
}
}
class header is not define properly
constructor is no defined
method is not defined properly
no error
The expression (x == y && a<b) is true If either x == y is true or a<b is true.
True
False
The programmer must explicitly create the system .in and system .out objects.
True
False
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>
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 name of a Java program file must match the name of the class with the extension Java.
True
False
DataInput is
An abstract class defined is java.io.
A class we can use to read primitive data types.
An interface that defines methods to open files.
An interface that defines methods to read primitive data types.
A package is a collection of
classes
interface
editing tools
classes and interfaces
Which of the following statements are valid array declarations?
int number();
float average[];
double[] marks;
counter int[];
Which javadoc tag is used to denote a comment for methods parameters?
@method
@parameter
@argument
@param
We can add more than one class(es) at the time of compilation Java Beans.
True.
False.
It is an error to catch the same type of exception in two different catch blocks associated with a particular try block.
True
False
Java always provides a default constructor to a class.
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