If a=10 and b= 15, then the statement x =(a>b)?a:b; assigns the value 15 to x.
True
False
Correct Answer :
A. True
Related Questions
It is an error to have a method with the same signature in both the super class and its subclass.
True
False
A Java monitor must either extend thread class or implement Runnable interface.
True
False
An EJB is a server-side component that encapsulates the business logic of an application
True
False
Which of the following are the wrapper classes?
Random
Vector
Byte
all of the above
A static class method can be invoked by simply using the name of the method alone.
True
False
We can over load methods with differences only in their return type.
True
False
Which of the following keywords are used to control access to a class member?
default
protected
interface
None of the above
When we invoke repaint () for a Component, the AWT invokes the method:
draw()
update()
show()
paint()
If a=10 and b= 15, then the statement x =(a>b)?a:b; assigns the value 15 to x.
True
False
executeUpdate(------------) returns ___________
Nothing
Returns a ResultSet object
Returns an integer value to show the no. of updated rows
None of the above.
Java always provides a default constructor to a class.
True
False
Which of the following string can be used as mode string for creating a RandomAccessFile object?
"rw"
"wr"
"0"
'w''
Two methods cannot have the same name in Java.
True
False
Which of the following are keywords?
integer
default
Boolean
Object
The methods wait() and noify() are defined in
java.lang.Thread
java.lang.Runnable
java.lang.Object
java.lang.ThreadGroup
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
For all insert, update, delete, query operations on a database, ResultSet object creation is mandatory.
True.
False.
When the string objects are compared with ==, the result is true If the strings contain the same values.
True
False
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
The use of protected keyword to a member in a class will restrict its visibility as follows:
Visibility only in the class and its subclasses in the same package.
Visibility only inside the same package.
Visibility in all classes in the same package and subclasses in other packages.
Visibility only in the class where it is declared.
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
The expression (x == y && a<b) is true If either x == y is true or a<b is true.
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 name of the RMI compiler is ___________
rmicom
rmic
jrmi
none of the above
One the features of is that an array can store many different types of values.
True
False
A method declared as static can not access non-static class members.
True
False
The break statement is required in the default case of a switch selection structure.
True
False
Connection, Statement are interfaces and ResultSet is a class.
True.
False.
Servlet can have ___________
get method and post method
get method or post method
Either of the above
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)