Home
Current Affairs January 2024

What is the correct answer?

4

All methods in an abstract class must be declared abstract.

A. True

B. False

Correct Answer :

B. False


Related Questions

What is the correct answer?

4

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

A. True

B. False

What is the correct answer?

4

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

A. //#

B. /*

C. /**

D. //**

What is the correct answer?

4

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

A. True

B. False

What is the correct answer?

4

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

A. remove()

B. desappear()

C. hide()

D. move()

What is the correct answer?

4

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

A. start()

B. init()

C. runnable()

D. run()

What is the correct answer?

4

Which of the following control expressions are valid for an if statement?

A. an integer expression

B. a Boolean expression

C. either A or B

D. Neither A or B

What is the correct answer?

4

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

A. True

B. False

What is the correct answer?

4

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

A. True

B. False

What is the correct answer?

4

In RMI we invoke client method from remote server

A. True

B. False

What is the correct answer?

4

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

A. True

B. False

What is the correct answer?

4

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?

A. Error. Won't compile

B. Division by zero

C. Catch block

D. Division by zero catch block

What is the correct answer?

4

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

A. True

B. False

What is the correct answer?

4

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

A. True

B. False

What is the correct answer?

4

Consider the following class definition.
Class Student extends String
{
}
What happens when we try to compile this class?

A. Will not compile because class body is not defined

B. Will not compile because class is not declared public

C. Will compile successfully.

D. Will not compile because String is abstract

What is the correct answer?

4

Throwing an exception always causes program termination.

A. True

B. False

What is the correct answer?

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

What is the correct answer?

4

The break statement is required in the default case of a switch selection structure.

A. True

B. False

What is the correct answer?

4

Every method of a final in class is implicitly final.

A. True

B. False

What is the correct answer?

4

Any class may be inherited by another class in the same package.

A. True

B. False

What is the correct answer?

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.

What is the correct answer?

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.

What is the correct answer?

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

What is the correct answer?

4

Which of the following are keywords?

A. integer

B. default

C. Boolean

D. Object

What is the correct answer?

4

JdbcOdbcDriver is an object of Object class

A. True

B. False

What is the correct answer?

4

Which of the following statements are valid array declarations?

A. int number();

B. float average[];

C. double[] marks;

D. counter int[];

What is the correct answer?

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

What is the correct answer?

4

Any method in a supper class can be over ridden in its subclass.

A. True

B. False

What is the correct answer?

4

All methods in an abstract class must be declared abstract.

A. True

B. False

What is the correct answer?

4

A Java monitor must either extend thread class or implement Runnable interface.

A. True

B. False

What is the correct answer?

4

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

A. True

B. False