#Image File Type.

1) You need to find information on the following file types.

a) GIF file:
GIF stands for Graphics Interchange Format. It is a bitmap image format that stores iamges up to 256 colours.

b) JPEG file:
JPEG stands for Joing Photographic Exports Group and is commonly used method of lossy compression of photographic images.

c) Animated GIF file:
Set of images that are compressed and saved as a GIF document. When opened the pictures are shown in a predetermined sequence and speed.

d) MPEG file:
Short for "Moving Pictures Expert Group". It is commonly referred to as moving digital or digital video.

e) Shockwave files:
A technology developed that enables Web pages to include multimedia files/objects.

2. What is a vector based image and how it is different to a bitmap based image.  
Vector based images are generated by using lines or vectors. By doing this it requires the storage of end-points in 2D space. Vector graphics are commomly used for applications requiring lines. They can be extremely accurate as well.

Vector based images is more of a drawing format while a bit-map image if more of a format of a photo. The advantages of using vector based image is that it can be stretched to any size without runing the quality of the image (eg, becoming blurry and pixelated). Where as bit-map is faster to display.

Where as a Bitmap iamge renders a picture within a fixed-sized window. The size of the window is determined by the number of pixels, or picture elements, that the computer screen has. A normal or average computer screen maybe have 1024 pixels by 708 pixels at the bottom. Each pixel can be drawn using whatever the colour depth or resolution that the graphic card supports. They can also take up more disk space then vector-based rendering.

Source(s):
http://wiki.answers.com/Q/What_is_the_difference_between_vector_and_bitmap_graphics
http://www.webopedia.com/TERM/M/MPEG.html