What is the core banking solution of the RBI?

The core banking solution of the Reserve Bank of India (RBI) is the E-kuber. It enables commercial banks to access their current account with the RBI, at any time, from any place. You can read about The Reserve Bank of India: Functions and Composition in the given link.

Further readings:

1. Non Performing Assets (NPA) – Facts for UPSC GS-III
2. Monetary Policy – Objectives, Roles and Instruments