A query string is a part of the URL (uniform resource locator). It consists of pairs of attributes and values. For instance, the URL https://ahost:8443/test?id=21 has a query string with the attribute "id" whose value is "21"

A query string is a part of the URL (uniform resource locator). It consists of pairs of attribute-value. For instance, the URL https://ahost:8443/test?id=21 has a query string with the attribute "id" whose value is "21"