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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()

Correct Answer :

C. hide()


Related Questions

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4

executeUpdate automatically updates data because___________

A. auto commit is on, by default

B. It performs a hidden commit statement as well

C. Does not commit

D. None of the above.

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4

When we invoke repaint () for a Component, the AWT invokes the method:

A. draw()

B. update()

C. show()

D. paint()

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4

It is an error to catch the same type of exception in two different catch blocks associated with a particular try block.

A. True

B. False

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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

If m and n are int type variables, what will be the result of the expression
'm % n' when m = -14 and n = -3?

A. 4

B. 2

C. -2

D. -4

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4

Java is fully object oriented programme.

A. true

B. false

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4

An EJB is a server-side component that encapsulates the business logic of an application

A. True

B. False

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4

Every call to wait has a corresponding call to notify that will eventually end the wafting.

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

The check box group class is a subclass of the component class.

A. True

B. False

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4

With javadoc, which of the following denotes a javadoc comment?

A. //#

B. /*

C. /**

D. //**

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4

Members of a class specified as private are accessible only to the methods of the class.

A. True

B. False

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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

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

Declarations can appear anywhere in the body of a Java method.

A. True

B. False

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4

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?

A. number=getParameter(99)

B. <number==99>

C.

D. <param = radius value ==99>

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4

When we implement an interface method, it should be declared as public.

A. True

B. False

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4

We can add more than one class(es) at the time of compilation Java Beans.

A. True.

B. False.

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4

In the code below, what data types the variable x can have?

A. byte b1 = 5;

B. byte b2 = 10;

C. x = b1 * b2;

D. int short

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4

The length of a string object 's1' can be obtained using the expression s1.length.

A. True

B. False

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4

JdbcOdbcDriver is an object of Object class

A. True

B. False

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4

A string object can not be modified after it is created.

A. True

B. False

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4

The use of protected keyword to a member in a class will restrict its visibility as follows:

A. Visibility only in the class and its subclasses in the same package.

B. Visibility only inside the same package.

C. Visibility in all classes in the same package and subclasses in other packages.

D. Visibility only in the class where it is declared.

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4

In a single Servlet class we can use____________

A. doGet(...) method only

B. doPost(...) method only

C. doGet(...) method and doPost(...) method both at a time.

D. Either 'a' or 'b'

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4

The concept of multiple inheritance is implemented in Java by

A. extending two or more classes

B. extending one class and implementing one or more interfaces

C. all the above

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4

The default case is always required in the switch selection structure.

A. True

B. False

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4

DataInput is

A. An abstract class defined is java.io.

B. A class we can use to read primitive data types.

C. An interface that defines methods to open files.

D. An interface that defines methods to read primitive data types.

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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

Throwing an exception always causes program termination.

A. True

B. False

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4

Which of the following classes are available in the java.lang package?

A. Random

B. Stack

C. String Buffer

D. Vector