A friend of mine sold items to a student who tried to use them for passing a foreign private exam. what r the consequences?

Appears to be an academic query.  A bonafide sale of any tool is not a crime, using it for an unlawful purpose is a crime.  Those who sell the knife is not a criminal but those who use that knife for murder is a criminal.  This practice applies to those instruments that are not banned from selling to the public. A pistol has to be sold to those who are having a valid license and to others, it is banned.  In case of using that pistol for unlawful purposes, those that sold are responsible as the sale is banned.

The person is stated to have been caught, will be prosecuted and punished as per evidences and law.

If there is a law banning or regulating the sale of the items, which were sold, then the seller can also be prosecuted under that law. If a gun is sold by even a licensed dealer to a person, who does not have the license to possess a gun the seller also can be punished. It all depends on the laws governing the item sold.

Did your freind (actually you) sell the implemnts knowingly that these will be used fior no other object rather than cheating.

whether the gadgets were manufactured only to facilitate cheating.