Certification answer: Answer (b) is correct. The application compiles successfully, but it does not display anything in the frame because nothing was added to the frame. The slider should be added to the frame by calling add(value) after the slider has been created.
Answer (a) is incorrect. The application compiles but does not run correctly because it doesn't display the slider.
Answer (c) is incorrect. The frame is empty, but this does not prevent the application from compiling successfully.
Answer (d) is incorrect. The new AskFrame() statement is correct. It calls the AskFrame constructor without assigning the object to a variable.