Please try to answer the questions yourself before looking at the answers below.

If someone using a Mac tells you to Command-click, what would you do in Windows?
What does it mean if a Photoshop menu command is followed by an ellipse?
What keyboard shortcut hides or displays all of the panels? Which keyboard shortcut hides/displays just the panels on the right side and the panel tabs at the bottom?
If you used the Tab key to remove the panels from the screen to give you more room to work on an image, how can you temporarily use the panels?
If you open new panels, close some panels, move panels, change the panel groupings, and resize panels, will they remain that way if you close and re-launch Photoshop?
How do you reset the Photoshop Settings file back to its original default settings?
Which settings can be reset after launching Photoshop?
What is the highest zoom level that you can have on an image? Use Photoshop to get the answer.
How do you pan around a zoomed-in image using the Navigator panel?
When viewing an image at 80% zoom, are you seeing all the pixels in that part of the image?
How many images can be open at one time?
With the default setting of 20 recorded history states, what happens in the History panel when you do the 21st thing to the image?
What happens when you highlight a previous history state?
How do you make the Info panel appear in the current workspace?
How do you make the Layers panel float free and be larger?
The Zoom and Hand tools have a 100% button in their Options bar. Explain what this button does.
Give a brief description of the purpose of each of the following panels.
Swatches
Navigator
Layers
History

Answers to the questions

If someone using a Mac tells you to Command-click, what would you do in Windows?

Ctrl-click
What does it mean if a Photoshop menu command is followed by an ellipse?

It means a dialog box will appear when you select that command.
What keyboard shortcut hides or displays all of the panels? Which keyboard shortcut hides/displays just the panels on the right side and the panel tabs at the bottom?

Tab
Shift-Tab
If you used the Tab key to remove the panels from the screen to give you more room to work on an image, how can you temporarily use the panels?

Move your mouse pointer to the left or right edge of the screen. A dark gray bar will appear and then the appropriate panel(s) will appear so that you can use them.
If you open new panels, close some panels, move panels, change the panel groupings, and resize panels, will they remain that way if you close and re-launch Photoshop?

Yes, the current Photoshop workspace is saved in the Photoshop Settings file.
How do you reset the Photoshop Settings file back to its original default settings?

As you launch Photoshop, hold down the following keys:
Windows: Shift-Ctrl-Alt
Macintosh: Shift-Command-Option
Which settings can be reset after launching Photoshop?
Reset All Tools – right-click on the tool icon on the left side of the Options bar
Reset the current workspace – click on the Workspace Switcher button on the right side of the Options bar and select, for example, Reset Essentials. It resets the panels, shortcuts and menus to their defaults
Reset the Foreground and Background colors – click the Default Colors button near the bottom of the Tools panel
If you haven’t reset the entire Settings file, you should at least reset these settings before starting each group of Guided Exercises.
What is the highest zoom level that you can have on an image? Use Photoshop to get the answer.

3200%
How do you pan around a zoomed-in image using the Navigator panel?

Put the mouse pointer inside of the proxy (red box) and drag.
When viewing an image at 80% zoom, are you seeing all the pixels in that part of the image?

No, to see every pixel in that part of the image, you need to view it at 100% or higher.
How many images can be open at one time?

Photoshop can open as many images as you wish, but you can only work on one at a time. Use the Window > Arrange command to specify how they are viewed. However, if your computer’s memory runs out of free space, Photoshop will perform slowly.
With the default setting of 20 recorded history states, what happens in the History panel when you do the 21^st thing to the image?

The most recent history state is added to the bottom of the History panel and the history state at the top of the panel disappears.
What happens when you highlight a previous history state?

The image reverts to the way it looked at that time. The changes that had been made to the image after that time are no longer evident. If you proceed from that history state, those changes will be lost.
How do you make the Info panel appear in the current workspace?

Click on Info in the Window menu.
How do you make the Layers panel float free and be larger?

Drag it out of its panel group by its tab. Resize it by dragging the lower-right corner.
The Zoom and Hand tools have a 100% button in their Options bar. Explain what this button does.

Displaying the image at 100% means that each image pixel displays in one monitor pixel.
Give a brief description of the purpose of each of the following panels.

Swatches – allows you to select a color from the color samples displayed
Navigator – allows you to zoom in/out and pan around the image
Layers – allows you to manipulate layers in the image
History – allows you to undo previous changes that you made to the image