Tax exemption for hra and interest on home loan

An individual doing a job and has only salary income. 
He was working in a multinational company in Bangalore and lives in a rented house there.
He purchased flat in Delhi for himself and family after taking loan from Bank, but he was still staying in Delhi on rented house.

Need to know in the above scenario, whether the client can take both HRA exemption and deduction of the interest on loan paid. 
Also can he claim the deduction on repayment of Principal loan amount.