1. What is joint application design (JAD)? What are the benefits of using this a
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Question
1. What is joint application design (JAD)? What are the benefits of using this approach? Briefly describe how the approach works.
2. Consider the object-oriented approach to system development. What is an object? Briefly describe the two major object-oriented principles of encapsulation and inheritance.
3. Briefly describe the three phases of the generic system development life cycle (SDLC).
4. What is meant by a business process?
5. Why would one create an "AS-IS" model when considering the development of a new information system?
6. What are the seven elements of a system?
7. The Prototyping methodology addresses several disadvantages/shortcomings of the SDLC methodology. What are the disadvantages of SDLC that are resolved by a prototyping methodology?
8. RAD methodologies address several disadvantages/shortcomings of the SDLC methodology. How do RAD methodologies attempt to address the shortcomings of SDLC methodologies?
Explanation / Answer
1) JOINT Application Design :
It is a methodology that involves the client or end user in the design and development of an application, through a succession of collaborative workshops called JAD sessions.
Benefits of JAD approach :
How JAD works :
The JAD process involves the following steps :
2) Object :
An object is an entity that has state ,behaviour and identity. It is an instance of class.
Encapsulation :
It is a process of wrapping code and data together into a single unit. It provides you control over the data.
Inheritance :
It is a mechanism in which one object acquires the properties and behaviour of parent object.
Inheritance represents IS-A relationship also known as parent-child relationship.
Inheritance is used for method overriding and code reusability.
The keyword used to acheive inheritance is extends.
4) Business Process :
It is a collection of linked tasks which find their end in the delivery of a service or product to a client.
Definition of Business Process: It is defined as the set of activities and tasks that once completed will acomplish an organisation goal.
6) System : A set of inter related components that must work together to acheive some common purpose.
Seven Elements of System :
The seven elements of a system are :
7) Disadvantages of SDLC that are resolved by prototyping methodology :
They are as follows :
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