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This assignment is worth 45% of your final grade for this module. Marks will be awarded as follows:
This is a relatively low fidelity prototype in terms of the levels of interaction (i.e. there is no back-end to the system, we are looking at the front-end) and you may include data that is 'hard-coded' rather than generated by the system. An example of this may be a list of products that is hard-coded in the page and not generated by a call to the back-end. (10%)
You would be expected to submit both the raw data of your heuristic evaluation and a report summarising the main findings in an appropriate format.
Your report should include a section in which you critique the usability of the system and reflect upon the efficacy of your criteria for identifying usability issues.
Question: (a) Can a set of data requirements be correctly modelled by two or more different ER diagrams? Explain your answer. You may use a small example, if you think it will
What are ways of finding out either an update is required or not for derived attributes? The ways to find out an update is required or, not are as: Explicit update
in case of functional dependencies how we get the higher normal form.
Two-way Associations Mostly, associations are travel in both directions, although not usually with same frequency. There are three approaches for the implementation. In
Define the concept of generalization A generalization is relationship between specific kind of thing and general thing. It is also known as "is-a-kind-of" relationship. Inher
Define the Wait for graph Ans: The wait-for-graph is a directed graph and consist of nodes and directed arcs; the nodes of the graph are active transactions. An arc of the grap
How many types of users works on database? Users are differentiated through the way they expect to interact along with the system (i) Application programmers-interact with
Data Warehousing & Mining 1. What is the concept of knowledge discovery in database? 2. Describe the following types of Multidimensional Data Models. • Stars, Snowflakes and
Boyce-Codd Normal Form (BCNF) The relation NEWSTUDENT (Enrolmentno, Sno, Sname, Cname, Cno,) has every attributes participating in candidate keys as all the attributes are assu
Code an Oracle Database trigger to enforce the constraint that an employee can never change his or her department.
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