what kind of testing is both alpha and beta testing code example

Example 1: what is alpha testing

Alpha testing is done by the in-house developers
Sometimes alpha testing is done by the client 
or outsourcing team with the presence
of developers or testers.

Example 2: alpha testing vs beta testing

Beta testing is done by a limited number
of end-users before delivery. 
Usually, it is done in the client’s place.

Beta testing is done by a limited number of
end-users before delivery. 
Usually, it is done in the client’s place.