Computer Science

You are the software engineer in Techno Wizard. You have been given a project an “E-Card System” by the organization for development. E-Card System is a web based system in which Member can register himself by filling up the registration form. User/member of the system selects a card of his own choice from the list of card category. User/member can send this card to his recipient/s along with music and sound. User can also write text on the card. System Administrator is responsible for keeping the record of members and cards. System Administrator can add new cards in the appropriate card category, delete and update the existing cards. Similarly, System Administrator can add new member, delete and update the data of the existing member.

Questions:

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a) Draw a use case diagram for the system (diagram should consists of at least three actors and six use cases)

b) Provide a narrative description for two of your use cases (one of which should be the

“Send Card” use case) including pre and post conditions where relevant and

Main alternatives.

A given FSM has an input, w, and an output, z. During four consecutive clock pulses, a sequence of four values of the wsignal is applied. Derive a state table for the FSM that produces z= 1 when it detects that either the sequence w: 1010 or w: 1110 has been applied; otherwise, z= 0. After the fifth clock pulse as one state is required to hold the output, the machine has to be again in the reset state, ready for the next sequence. Minimize the number of states needed.

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