Q:

What kind of indexing are used in MyISAM and InnobDB engines?

I read that InnobDB uses B+ Tree and Clustered indexing on Primary Key and Hash(H) Tree and Non Clustered indexing on multiple keys (unique key).
But I did not get any explanation for MyISAM..
And what I read for InnobDB is correct ?

A:

Yes you are correct regarding the InnoDB. For MyISAM see below 
B-tree indexes  Yes T-tree indexes  No  Hash indexes    No

Read Here more 

