Extensive and diverse datasets have enabled determination of cosmological parameters to unprecedented precision. The availability of present and future large datasets makes it important to develop methods to determine cosmological parameters in model independent manner. In this talk, I will discuss present constraints on parameters, especially the dark energy equation of state parameter and consistency of datasets using different methods. I will also present results in the light of the so-called "Hubble tension", attempts to alleviate it and how internal consistency in data can provide a way to validate estimates of errors in parameters.