8. A user interface designing system for designing a user interface (UI) for an application, the user interface designing system comprising: a processor; a question-answer module coupled to the processor to, receive a first response from a user comprising user selected first answers to pre-defined questions, wherein the pre-defined questions pertain to requirements of the UI associated with pre-defined user experience parameters, wherein the pre-defined user experience parameters are indicative of user experience for the UI, and wherein a user selected first answer to a respective pre-defined question is indicative of a requirement applicable for the UI with respect to the respective pre-defined question; and receive a second response from the user comprising user selected second answers to the pre-defined questions, wherein a user selected second answer to a respective pre-defined question is indicative of significance to business of the UI with respect to the respective pre-defined question; a weightage assignment module coupled to the processor to, assign a significance to interface (STI) weightage to each of the user selected first answers with respect to each of the pre-defined user experience parameters, wherein an STI weightage for a user selected first answer with respect to a pre-defined user experience parameter is indicative of degree of significance of a corresponding requirement with respect to the pre-defined user experience parameter; and assign a significance to business (STB) weightage to each of the user selected second answers, wherein an STB weightage for a user selected second answer to a pre-defined question is indicative of degree of significance to business of the UI with respect to the pre-defined question; a user experience parameter applicability determination module coupled to the processor to, compute total actual effective weightage for each pre-defined user experience parameter, wherein total effective weightage for a respective pre-defined user experience parameter is computed based on summation of multiplication of the STI weightages of the user selected first answers with respect to the respective pre-defined user experience parameter with the STB weightages of the user selected second answers; calculate total maximum effective weightage for each pre-defined user experience parameter, wherein total maximum effective weightage for a respective pre-defined user experience parameter is computed based on summation of multiplication of maximum possible STI weightage for a first set of pre-defined answers for each of the pre-defined questions with the respective pre-defined user experience parameter with maximum possible STB weightage for a second set of pre-defined answers for each of the pre-defined questions; and determine an applicability index for each pre-defined user experience parameter based on ratio of the total actual effective weightage to the total maximum effective weightage for a respective pre-defined user experience parameter, wherein an applicability index for a pre-defined user experience parameter is indicative of relative importance of the pre-defined user experience parameter with respect to other pre-defined user experience parameters for designing the UI for the application.
8. A user interface designing system for designing a user interface (UI) for an application, the user interface designing system comprising: a processor; a question-answer module coupled to the processor to, receive a first response from a user comprising user selected first answers to pre-defined questions, wherein the pre-defined questions pertain to requirements of the UI associated with pre-defined user experience parameters, wherein the pre-defined user experience parameters are indicative of user experience for the UI, and wherein a user selected first answer to a respective pre-defined question is indicative of a requirement applicable for the UI with respect to the respective pre-defined question; and receive a second response from the user comprising user selected second answers to the pre-defined questions, wherein a user selected second answer to a respective pre-defined question is indicative of significance to business of the UI with respect to the respective pre-defined question; a weightage assignment module coupled to the processor to, assign a significance to interface (STI) weightage to each of the user selected first answers with respect to each of the pre-defined user experience parameters, wherein an STI weightage for a user selected first answer with respect to a pre-defined user experience parameter is indicative of degree of significance of a corresponding requirement with respect to the pre-defined user experience parameter; and assign a significance to business (STB) weightage to each of the user selected second answers, wherein an STB weightage for a user selected second answer to a pre-defined question is indicative of degree of significance to business of the UI with respect to the pre-defined question; a user experience parameter applicability determination module coupled to the processor to, compute total actual effective weightage for each pre-defined user experience parameter, wherein total effective weightage for a respective pre-defined user experience parameter is computed based on summation of multiplication of the STI weightages of the user selected first answers with respect to the respective pre-defined user experience parameter with the STB weightages of the user selected second answers; calculate total maximum effective weightage for each pre-defined user experience parameter, wherein total maximum effective weightage for a respective pre-defined user experience parameter is computed based on summation of multiplication of maximum possible STI weightage for a first set of pre-defined answers for each of the pre-defined questions with the respective pre-defined user experience parameter with maximum possible STB weightage for a second set of pre-defined answers for each of the pre-defined questions; and determine an applicability index for each pre-defined user experience parameter based on ratio of the total actual effective weightage to the total maximum effective weightage for a respective pre-defined user experience parameter, wherein an applicability index for a pre-defined user experience parameter is indicative of relative importance of the pre-defined user experience parameter with respect to other pre-defined user experience parameters for designing the UI for the application. 11. The user interface designing system as claimed in claim 8 , wherein the user selected second answer for a respective pre-defined question is from amongst the second set of pre-defined answers for the respective pre-defined question.