26. What is the shortcut key to switch between open applications on a Mac?
a. Command + Tab
b. Command + Shift + Tab
c. Command + Option + Tab
d. Command + Control + Tab
27. What is the shortcut key to open the System Preferences on a Mac?
a. Command + P
b. Command + S
c. Command + , (comma)
d. Command + /
28. What is the shortcut key to open the Command Prompt in Windows?
a. Win + C
b. Win + R
c. Ctrl + R
d. Ctrl + Alt + T
29. What is the shortcut key to select all text in a document or web page?
a. Ctrl + A
b. Ctrl + X
c. Ctrl + C
d. Ctrl + V
30. What is the shortcut key to toggle full-screen mode in most web browsers?
a. F11
b. F12
c. F10
d. F9