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What is the correct answer?

4

Objects are passed to a method by use of call-by-reference.

A. True

B. False

Correct Answer :

A. True


Related Questions

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4

When X is a positive number the operations x>> 2 and x>>>2 both produce the same result.

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

A package is a collection of

A. classes

B. interface

C. editing tools

D. classes and interfaces

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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

Declaring a method synchronized guarantees that the deadlock cannot occur.

A. True

B. False

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4

The break statement is required in the default case of a 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

Message-Driven beans act as a listener for the Java Message Service API, processing messages synchronously

A. True

B. False

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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

Frames and applets cannot be used together in the same program.

A. True

B. False

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4

A catch can have comma-separated multiple arguments.

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

Which of the following methods can be used to draw the outline of a square?

A. fillRect()

B. drawLine()

C. drawString()

D. all of the above

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4

Throwing an exception always causes program termination.

A. True

B. False

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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

A method declared as static can not access non-static class members.

A. True

B. False

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4

Which of the following methods belong to the String class?

A. length()

B. compareTo()

C. substring()

D. all of the them

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4

putValue(...) method takes _____________________-

A. Two arguments of object type

B. First one is of a character type and second one is of an object type

C. First one is of an object type and second one is of a character type

D. None of the above.

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4

DriverManager.getConnection("jdbc:odbc:dsn_name") method does not depend on the class.forName(...) method.

A. True.

B. False.

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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

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

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

Which of the following command lines options generates documentation for all classes and methods?

A. -protected

B. -public

C. -private

D. -encoding

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4

What is error in the following class definitions? 
abstract class xy { 
abstract sum(int x, int y) {
}
}

A. class header is not define properly

B. constructor is no defined

C. method is not defined properly

D. no error

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4

To delete a file, we can use an instance of class file.

A. True

B. False

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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

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4

The modulus operator (%) can be used only with Integer operands.

A. True

B. False

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4

It is an error if a class with one or more abstract methods is not explicitly declared abstract.

A. True

B. False

What is the correct answer?

4

Java is fully object oriented programme.

A. true

B. false

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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()