While working with various File Explorer windows, Gina notices that every window has the 
button at its right end. On clicking this button, she observes that _____.?
A. ?all the open File Explorer windows close and the system restarts
B. ?all the open File Explorer windows are minimized into a button and thumbnails for each window appear above the button
C. ?the browser starts and displays search results for the search phrase "get help with file explorer in windows 10" in the Bing search engine
D. ?a list of all open windows appear, with the active window being overlapped by other open windows
Answer: C
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If you attempt to perform an operation with a null reference variable __________.
a. the resulting operation will always be zero b. the results will be unpredictable c. the program will terminate d. Java will create an object to reference the variable
Three computers together provide a replicated service. The manufacturers claim that each computer has a mean time between failure of five days; a failure typically takes four hours to fix. What is the availability of the replicated service?
What will be an ideal response?
Browsers convert percentage widths to ____ values, so some rounding of those values is bound to occur as a result.
A. pixel B. pica C. em D. point
Enhance the Painter application that you developed to include menus to allow the user to select the size and color of the painted ellipses and the color of the JFrame (Fig. 22.34). (The menus replace the JRadioButtons.) Also, add a multiline JTextArea that allows the user to type text to accompany the painting. The user should be able to use menus to select the font style and color of the text and the background color of the JTextArea.
a) Copying the template to your working directory. Copy the C:Examples Tutorial22ExercisesPainterEnhanced directory to your C:SimplyJava direc- tory.
b) Opening the template file. Open the Painter.java file in your text editor.
c) Creating paintJMenu. In line 75, add the code that will set up paintJMenu. To do this, create a new JMenu and assign it to paintJMenu. Next, set the text of paintJ- Menu to "Paint". Set the mnemonic for paintJMenu to the P key. You will need to use KeyEvent constant VK_P. The, add paintJMenu to painterJMenuBar.
d) Creating textJMenu. Before the code that sets up textColorJMenuItem, add the code that will set up textJMenu. To do this, create a new JMenu and assign it to text- JMenu. Next, set the text of textJMenu to "Text". Set the mnemonic for textJMenu to the T key. You will need to use KeyEvent constant VK_T. Then, add textJMenu to painterJMenuBar.
e) Allowing the user to select the paint color. In the paintColorJMenuItemAction- Performed method, dec