Question

fruits and vegetables are dried before making their pickles in high salt concentration

Answer 1

Fruits and vegetables are dried up at first carefully prior to production of pickles to get rid of the water substance in them since this can be a basis for decaying or getting spoilt.

After this, salt is added as supplementary in high concentration to the pickles to act as a conserving agent and to slow down unwanted microbial activity.

This provides a favourable environment for the mandatory fermentation and ensures that the pickle lasts for a long time.