Help with multiple choice questions :)

[javalikeaboss]

I'm currently revising for a java test and wondered if you guys could help me out :)

Consider the method in the line of code below. Which statement is true?
Button. addActionListener (this);

A ‘this’ refers to the button that is to be used
B ‘this’ refers to the procedure call add Action Listener
C ‘this’ is a hidden pointer to the AWT
D ‘this’ refers to this applet


Public class member Exception extends Exception { } and

A defines the Exception class and required methods to deal with all
exceptions
B extends the exception class to provide methods not covered by the standard
library
C extends the exception class to provide handlers for exceptions raised in
your code
D extends the exception message text.

The keyword super is used to:

A permit polymorphism in inheriting classes
B access a member function of the base class
C prevent access to data numbers in the base class
D protect data members in the base class so that they can be accessed by, but not
changed by, inheriting classes

10. The Flow Layout Manager?
A Sets the size of the GUI Frame
B Allows the programmer complete control over GUI object placement.
C Organises GUI objects in the sequence in which they are specified
D Sets the size of Panel Objects.

11. Consider the Super Class. Which statement is true?
A Super is a keyword NOT a Class
B The Super Class Is the Base Class
C The Base Class Extends the Super Class
D The Super Class Extends the Base Class

13. Consider The C++ Enum Type. Which statement is true?
A Java supports Enums For Compatibility.
B Java Does not support the Enum type.
C In Java Enums are implicit to the compiler.
D Java supports Enums in header files.

15. Consider the Swing API. Which statement is true?
A Swing provides access to all the Microsoft windows API calls
B Swing relies on the operating system for its functionality
C Swing is a lightweight, limited function API
D Swing is largely operating system independent providing a full range of
Graphics User Interface APIs.

19. A Big decimal has a maximum value of approximately?
A 4294967296
B 2^128
C 9*10^4294967296
D 10^32676



Is it A,B,C OR D for each question?

Thanks again :)

[javalikeaboss]

What is the maximum value for a big decimal approximately?

[Norm]

You forgot to post your answers with the reasons you chose them.

[javalikeaboss]

Consider the method in the line of code below. Which statement is true?
Button. addActionListener (this);

My answer B - because 'this' is what is happening when the button is clicked?

Public class member Exception extends Exception { } and

My answer C - because it will allow typos to be handled?

The keyword super is used to:

My answer D - because it allows you to access data in the base class but you cannot change what is in the base class?

10. The Flow Layout Manager?

My answer C - because it puts objects in sequence, then puts on next line like paragraphing?

11. Consider the Super Class. Which statement is true?

My answer A - because super is not a class - I think it is a keyword?

13. Consider The C++ Enum Type. Which statement is true?

My answer A - because Java did not use to support Enums but now it does for compatibility reasons?

15. Consider the Swing API. Which statement is true?

My answer D - because you can use it on different operating systems and it provides many features.

19. A Big decimal has a maximum value of approximately?

My answer A - because a big decimal consists of an arbitrary precision integer unscaled value and a 32-bit integer scale?


Are these explanations and answers right? thanks

[pbrockway2]

Approximately infinity.

[JosAH]

Approximately infinity.

Nah, not even close ;-)

kind regards,

Jos

[javalikeaboss]

Thanks for the reply :)

But I have this question i need to answer...

19. A Big decimal has a maximum value of approximately?
A 4294967296
B 2^128
C 9*10^4294967296
D 10^32676

I am not sure which one is correct as I have searched everywhere and I get responses like 'infinity' or 'depends on your computer memory'.
Please help :)

[pbrockway2]

I'd go with C - which is approximately equal to infinity (although not close).

What do the Javadocs say? The Jvm spec? The compiler? The runtime?

[DarrylBurke]

In future, don't ask the same question in more than one thread. I've merged the two threads.

db