Globular clusters (GCs) are one of the oldest systems, where stellar interactions occur due to the high stellar density of the system. These stellar interactions lead to several dynamical processes, such as stellar collisions, core collapse, stellar mergers, two-body relaxation and mass segregation from equi-partition of energy. GCs harbour exotic stellar populations and are the only sites where the end products of stellar collision (i.e., blue straggler stars, BSSs) can be found. GCs also harbor other hot stellar population like horizontal branch (HB) stars, Extended horizontal branch (EHB) stars and other peculiar population stars like Asymptotic giant branch (AGB) stars, which are bright at UV wavelengths. To study these hot stellar population, UVIT/GALEX photometry in combination with ground-based photometry provides a unique window to study the Spectral energy distribution (SEDs) and camparing theoretical isohrones with the observed CMDs. Also, GAIA DR2 proper motion data release has provided a powerful tool for studying genuine hot stellar population in Galactic GCs.