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.
Correct Answer :
A. auto commit is on, by default
Related Questions
JSP files creates ________________
html files
html files and java files
java files and class files
None of the above.
Connection, Statement are interfaces and ResultSet is a class.
True.
False.
A constructor must always invoke its supper class constructor in its first statement.
True
False
Which of the following keywords are used to control access to a class member?
default
protected
interface
None of the above
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
Which of the following are keywords?
integer
default
Boolean
Object
We can add more than one class(es) at the time of compilation Java Beans.
True.
False.
The keywords reserved but not used in the initial version of Java re:
Synchronized
Boolean
union
goto
DriverManager.getConnection("jdbc:odbc:dsn_name") method does not depend on the class.forName(...) method.
True.
False.
A variable declared inside the for loop control can not be referenced out side the loop.
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()
An EJB is a server-side component that encapsulates the business logic of an application
True
False
The import statement is always the first no comment statement in a Java program files.
True
False
What does the following line of code do?
TextField text=new TextField(10);
Creates text object that can hold 10 rows of text.
Creates text object that can hold 10 columns of text.
Creates the object text and initializes it with the value 10.
The code is illegal.
Which key word can protect a class in package from accessibility by the classes outside the package?
private
protected
final
don't use any keyword at all(make it default)
In RMI we invoke client method from remote server
True
False
forName() is a static factory method
True
False
The check box group class is a subclass of the component 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.
A final class may not have any abstract method.
True
False
It is an error if a class with one or more abstract methods is not explicitly declared abstract.
True
False
The expression (x == y && a<b) is true If either x == y is true or a<b is true.
True
False
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'
For all insert, update, delete, query operations on a database, ResultSet object creation is mandatory.
True.
False.
The modulus operator (%) can be used only with Integer operands.
True
False
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
Any class may be inherited by another class in the same package.
True
False
The break statement is required in the default case of a switch selection structure.
True
False
When the string objects are compared with ==, the result is true If the strings contain the same values.
True
False