Correct Answer:
D. Alt+F4
Explanation:
The correct answer is Alt+F4 because it is the universal keyboard shortcut in the Microsoft Windows operating system to close the currently active application window.
- Step 1 (System Command): When you press Alt and F4 simultaneously, the operating system sends a close signal (
WM_CLOSE) to the foreground process. - Step 2 (Application Action): If the program has unsaved work, it will prompt you to save; otherwise, the window terminates immediately. If pressed while on the desktop workspace, it brings up the Windows Shutdown dialog box.
- Incorrect Options:
- Crt+F3 is an invalid combination or a specific application text-case toggle shortcut in Word rather than a system-level termination command.
- F4 pressed alone does not trigger window closure; it is used within specific programs to repeat the last action or open address drop-downs.
- Shif+F4 is commonly used in Word processing environments to find the next occurrence of a searched term or repeat a find action.
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