Java always provides a default constructor to a class.
True
False
Correct Answer :
B. False
Related Questions
A thread can make second thread ineligible for execution by calling the suspend (-) method on second thread.
True
False
It is perfectly legal to assign a subclass object to a supper class reference.
True
False
The programmer must explicitly create the system .in and system .out objects.
True
False
Which of the following methods can be used to change the size of a
size() *
resize()
component
dimension()
setSize()
size()
DriverManager.getConnection("jdbc:odbc:dsn_name") method does not depend on the class.forName(...) method.
True.
False.
Which of the following represent legal flow control statements?
break();
continue(inner);
return;
exit();
Which of the following classes are available in the java.lang package?
Random
Stack
String Buffer
Vector
Any method in a supper class can be over ridden in its subclass.
True
False
Which of the following keywords are used to control access to a class member?
default
protected
interface
None of the above
The setBackground() method is part of the class
Applet
Component
Container
Object
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
It is an error to catch the same type of exception in two different catch blocks associated with a particular try block.
True
False
Which exception is thrown by the read() method of InputStream class?
IOException
FileNotFoundException
ReadException
None of the above
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'
We can over load methods with differences only in their return type.
True
False
In evaluating a logical expression of type 'Boolean expression 1&& Boolean expression 2', both the Boolean expressions are not always evaluated.
True
False
It is an error if a class with one or more abstract methods is not explicitly declared abstract.
True
False
A class may be both abstract and final.
True
False
In order to connect to a database through java program we must create _______-
Connection, Statement, ResultSet
Connection, ResultSet
Statement< ResultSet
Connection, Statement
Servlet has ___________
init method
doGet(------) method
All of the above methods.
Message-Driven beans act as a listener for the Java Message Service API, processing messages synchronously
True
False
For all insert, update, delete, query operations on a database, ResultSet object creation is mandatory.
True.
False.
Which of the following statements are valid array declarations?
int number();
float average[];
double[] marks;
counter int[];
Any class may be inherited by another class in the same package.
True
False
The default case is always required in the switch selection structure.
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
Servlet can have ___________
get method and post method
get method or post method
Either of the above
Which of the following methods can be used to remove a component from the display?
remove()
desappear()
hide()
move()
Java always provides a default constructor to a class.
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>