E verification

Not mandatory to e- verify the return. It is the option of the assessee whether to e-verify or send the signed acknowledgement to CPC.

if u have choosen to sign n send then no everify required.

There are Two option after filing the ITR

1st, you can e-verify your ITR by your Aadhar

and 2nd other you can generate Acknowlegement and send it to IT dept Banglore by Ordinary post or speed post only. 

no this is not compulsory to e-verify the return, you have option to send or e-verify

Not required, if you have not choosen e-verify option.