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4

Which of the following statements are true?

A. An abstract class may not have any final methods?

B. A final class may not have any abstracts methods.

C. Transient variables must be static.

D. all of the above

Correct Answer :

B. A final class may not have any abstracts methods.


Related Questions

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4

Java is fully object oriented programme.

A. true

B. false

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4

The import statement is always the first no comment statement in a Java program files.

A. True

B. False

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4

Which of the following methods can be used to change the size of a
size() *
resize()

A. component

B. dimension()

C. setSize()

D. size()

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4

Which key word can protect a class in package from accessibility by the classes outside the package?

A. private

B. protected

C. final

D. don't use any keyword at all(make it default)

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4

Which of the following string can be used as mode string for creating a RandomAccessFile object?

A. "rw"

B. "wr"

C. "0"

D. 'w''

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4

A static class method can be invoked by simply using the name of the method alone.

A. True

B. False

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4

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.

A. True

B. False

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4

In evaluating a logical expression of type 'Boolean expression 1&& Boolean expression 2', both the Boolean expressions are not always evaluated.

A. True

B. False

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4

What does the following line of code do?
TextField text=new TextField(10);

A. Creates text object that can hold 10 rows of text.

B. Creates text object that can hold 10 columns of text.

C. Creates the object text and initializes it with the value 10.

D. The code is illegal.

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4

Which exception is thrown by the read() method of InputStream class?

A. IOException

B. FileNotFoundException

C. ReadException

D. None of the above

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4

In RMI we invoke client method from remote server

A. True

B. False

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4

When present, package must be the first no comment statement in the file.

A. True

B. False

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4

It is perfectly legal to refer to any instance variable inside of a static method.

A. True

B. False

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4

class.forName(...) creates an instance of java ODBC driver

A. True

B. False

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4

Two methods cannot have the same name in Java.

A. True

B. False

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4

We would like to make a member of a class visible in all subclasses regardless of what package they are in. Which one of the following keywords would achieve this?

A. private

B. protected

C. public

D. private protected

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4

executeUpdate(------------) returns ___________

A. Nothing

B. Returns a ResultSet object

C. Returns an integer value to show the no. of updated rows

D. None of the above.

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4

A thread can make second thread ineligible for execution by calling the suspend (-) method on second thread.

A. True

B. False

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4

Which of the following keywords are used to control access to a class member?

A. default

B. protected

C. interface

D. None of the above

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4

Session bean

A. Represents a single client inside the application server

B. Can not be shared

C. Is not persistent

D. Satisfies all of the above conditions

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4

Submit button always fires doPost(...)

A. True

B. False

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4

All methods in an abstract class must be declared abstract.

A. True

B. False

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4

When we implement the Runnable interface, we must define the method

A. start()

B. init()

C. runnable()

D. run()

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4

When the string objects are compared with ==, the result is true If the strings contain the same values.

A. True

B. False

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4

What is wrong in the following class definitions? 
abstract class print { 
abstract show();
}
class Display extends print {
}

A. Nothing is wrong

B. Wrong Method show() should have a return type

C. Wrong Methods show() is not implemented in Display

D. Wrong Display does not contain any members.

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4

The name of the RMI compiler is ___________

A. rmicom

B. rmic

C. jrmi

D. none of the above

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4

Which of the following methods can be used to remove a component from the display?

A. remove()

B. desappear()

C. hide()

D. move()

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4

Throwing an exception always causes program termination.

A. True

B. False

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4

forName() is a static factory method

A. True

B. False

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4

A constructor must always invoke its supper class constructor in its first statement.

A. True

B. False