You may encounter the issues of linking one PDF file to the power point presentation. Its pretty simple, Follow the steps :)

1. Select the text or object you want to use to link to the PDF file
2. On the Insert tab, in the Links group, click Hyperlink
3. Under Link to, Click Existing File or Webpage
4. Select the PDF file you want to link and then click Ok
5. Verify the link

Reference  

http://office.microsoft.com/en-us/powerpoint-help/using-powerpoint-2010-and-2007-with-pdf-files-HA102586125.aspx#_Toc287451153

Step 1: Download .ico file or create a .ico file
Step 2 : Right clikc on the folder you want to change and click Properties 

Step 3 :  go to Customize tab and click Change icon
Step 4 : Click browse and give the location of your .ico file 

Out come will be some thing similar to following.  Cool :)

In the web world there are many methods used by HTTP.  Following are the main methods for HTTP/1.1 specification. Every methods implemented for a specific reason. Every method have pros and cons as well. we can catercorised these methods into two divisions ass follows

1. Safe methods - GET, HEAD
2. Idempotent Methods- DELETE, GET, PUT, HEAD, OPTION TRACE

Methods 

1. GET
2. POST
3. HEAD
4. PUT
5. DELETE
6. TRACE
7. CONNECT
8. OPTION