Question:What is the use of Magic Wand tool in Photoshop? 

The Magic Wand tool lets us select a consistently colored area (for example, a red flower) without having to trace its outline. We can specify the color range, or  for the Magic Wand tool's selection.We cannot use the Magic Wand tool on an image in Bitmap mode.

Question:How do we crop an image in Photoshop? 

1. Select the Crop tool in the toolbox.
2. In the options bar at the top of the work area, make sure Width, Height, and Resolution contain no values. These settings constrain the dimensions of the crop rectangle. If necessary, click the Clear button to clear them.
3. Drag over the part of the photo that you want to keep. To straighten or rotate the photo, drag the cropping rectangle over the entire photo.
4. When you are satisfied with the size and location of the cropping rectangle, press Enter (Windows)

Question:What is Gradients in Photoshop? 

We can fill an area with a gradient by dragging in the image. The starting point (where the mouse is pressed) and ending point (where the mouse is released) affect the gradient appearance, depending on the Gradient tool used. 

There are five gradent options are available in Photoshop:
Linear gradient : to shade from the starting point to the ending point in a straight line.
Radial gradient : to shade from the starting point to the ending point in a circular pattern.
Angle gradient : to shade in a counterclockwise sweep around the starting point.
Reflected gradient : to shade using symmetric linear gradients on either side of the starting point.Diamond gradient : to shade from the starting point outward in a diamond pattern. The ending point defines one

Question:Why tool preset option is used in Photoshop? 

We can load, edit, and create libraries of tool presets using the Tool Preset picker in the options bar, the Tool Presets palette, and the Preset Manager. We can also save and reuse tool settings using tool presets.

Question:What is visibility toggle? 

The Eye icon allows us to make layers visible or invisible within the image window. Click the eye icon within the pen layer. The eye icon disappears and the pen image becomes invisible. Click the Visibility toggle again. The Eye icon displays and the pen image appears one again on your image window.

Question:What do you means by move tool? 

The Move tool allows us to move an image around the image window. To use this tool, we must first select the layer that contains the image you want to move. With the proper layer selected, we can then select the Move tool and move any images on that layer around.

Question:what is the benefit of using layer set? 

Layer sets are folders into which we can collect several individual layers. The benefit of using layer set  is that by using layer set we can turn on and off all the layers grouped in a layer set at a time. We can also move them all at once with the Move tool, and resize them and reshape them all with the Free Transform command.

Question:How can we use the Clone Stamp tool in Adobe Photoshop for retouching/ repairing  an image. 

The Clone Stamp tool is used to paint one part of an image over another part of the same image or over another part of any open document that has the same color mode.So, we can use the Clone Stamp tool for retouching and repairing a defective image.