Objects are passed to a method by use of call-by-reference.
True
False
Correct Answer :
A. True
Related Questions
The default case is always required in the switch selection structure.
True
False
Submit button always fires doPost(...)
True
False
Which of the following represent legal flow control statements?
break;
break();
continue(inner);
all of the above
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.
forName() is a static factory method
True
False
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 before running the client program we must start RMI Registry.
True.
False.
Which of the following will produce a value of 22 if x=22.9:
Ceil(x)
Round(x)
Rint(x)
Abs(x)
One the features of is that an array can store many different types of values.
True
False
Which of the following are the wrapper classes?
Random
Vector
Byte
all of the above
The length of a string object 's1' can be obtained using the expression s1.length.
True
False
It is perfectly legal to assign a subclass object to a supper class reference.
True
False
The import statement is always the first no comment statement in a Java program files.
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
Servlet has ___________
init method
doGet(------) method
All of the above methods.
The programmer must explicitly create the system .in and system .out objects.
True
False
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
Any class may be inherited by another class in the same package.
True
False
A thread can make second thread ineligible for execution by calling the suspend (-) method on second thread.
True
False
The break statement is required in the default case of a switch selection structure.
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
A static class method can be invoked by simply using the name of the method alone.
True
False
What is wrong in the following class definitions?
abstract class print {
abstract show();
}
class Display extends print {
}
abstract show();
}
class Display extends print {
}
Nothing is wrong
Wrong Method show() should have a return type
Wrong Methods show() is not implemented in Display
Wrong Display does not contain any members.
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.
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.
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
A Java monitor must either extend thread class or implement Runnable interface.
True
False
If a=10 and b= 15, then the statement x =(a>b)?a:b; assigns the value 15 to x.
True
False
Which of the following methods can be used to change the size of a
size() *
resize()
component
dimension()
setSize()
size()
Which of the following methods can be used to draw the outline of a square?
fillRect()
drawLine()
drawString()
all of the above