4. Which shortcut is used for taking screenshots on macOS? a) Command + Shift+3 b) Command + Shift+4 C) Command + Option +4 d) Command + Shift+s

The correct answer is a) $Command\quad +\quad Shift+3$.<br /><br />On macOS, the shortcut for taking a screenshot of the entire screen is $Command\quad +\quad Shift+3$. This will save the screenshot to your desktop. If you want to save the screenshot to a specific location, you can use the $Command\quad +\quad Shift+4$ shortcut, which will allow you to select a specific area of the screen to capture. The $Command\quad +\quad Option\quad +4$ shortcut is used to capture a specific window, and the $Command\quad +\quad Shift+S$ shortcut is used to save the screenshot to a file.