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To be answered in (25) Minutes [ Answer to the following using IT or Fl No 1 By using interaction models, we can define the translations between what the user wants and what the system does. 2 Hierarchical representation Models deals with the issues of formulation of goals and tasks. 3 We can use GOMS as a predictive model to know how fast the execution of the system is and where are the problems in the system. 4 Ergonomics concerned with the understanding of interactions between humans and other elements of a system 5 Gulf of Execution is the distance between the physical presentation of the system state, and expectation of the user 6 Linguistic and grammatical models deal with the articulation of the human motor system at a low level of human understanding 7 Instructing Interaction type means user has a dialogue with the system by means of speech-based or typed-questions-based interface. B Measures based upon Backus-Naur Form (F) have been reviewed with some problems which could not be handled by Task Action Grammar (TAG) Command line Interface style is better for expert users than novices and good for 9 repetitive tasks. 10 Keystroke-level model is related to GOMS model and can be considered as a very low level of GOMS model 11 in interface Design we can use Blue Color to display critical information or warnings 12 GOMS takes in consideration the possibility of users errors Ummy oc 1/11 Marks Ans. P