BT0081, SOFTWARE ENGINEERING

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ASSIGNMENT

PROGRAM	BSc IT
SEMESTER	FOURTH
SUBJECT CODE & NAME	BT0081, SOFTWARE ENGINEERING
CREDIT	4
BK ID	B1090
MAX.MARKS	60

Q.1 Explain Information content and determinacy.

Answer: The kind of 'information' produced by a mindless computer program or a natural, physical mindless process is cheap, worthless, meaningless information. Just let it run forever and it produces an endless stream of 'information'! That is not what humans call information. There is the real paradox.

Another way of stating the paradox is: a long random string of letters has a higher Information Content then a book of the same length. This is so because a random string is hardly compressible at all, while the content of a book can easily be compressed (as everyone knows who uses PC compression programs as pkzip, winzip, etc). In fact a random string has the maximum amount of information. This definition of information was not invented by Paul Davies, but by

Q2 What is Iterative Development Model? Explain in detail.

Answer: An iterative life cycle model does not attempt to start with a full specification of requirements. Instead, development begins by specifying and implementing just part of the software, which can then be reviewed in order to identify further requirements. This process is then repeated, producing a new version of the software for each cycle of the model.

In the diagram above when we work iteratively we create rough product or product piece in one iteration, then review it and improve it in next iteration and so on until it’s finished. As shown in the image above, in the first iteration the whole painting is sketched roughly, then in the second iteration colors are filled and in the third iteration finishing is done.

Q.3 Explain the various steps involved in establishing a reliability specification and statistical testing.

Answer: Design for Reliability (DFR) is not a new concept, but it has begun to receive a great deal of attention in recent years. What is DFR? What are the ingredients for designing for reliability, and what is involved in implementing DFR? Should DFR be part of a Design for Six Sigma (DFSS) program, and is DFR the same as DFSS? In this article, we will try to answer these questions and, at the same time, we will propose a general DFR process that can be adopted and

Q.4 Differentiate object-oriented and function oriented approaches.

Answer: In object oriented programming everything (or almost everything) is treated as an object that can be modified and that can perform tasks, or in OOP speak one might say objects have state and behavior. What it buys you is modularity, and data hiding.

According to Object Oriented Programming an object that models a ball, from above the ball can be modified for example you may be able to change the color of the ball. It can also perform tasks for example the ball can roll, or be thrown. As an object it is bundled neatly in a package that provides methods to change the state of the ball, and to make the ball perform actions. This package is usually called a module, in addition to the methods used to

Q.5 Identify the different documents which may be produced to aid the maintenance process.

Answer: ABSTRACT: Software engineering has been striving for years to improve the practice of software development and maintenance. Documentation has long been prominent on the list of recommended practices to improve development and help maintenance. Recently however, agile methods started to shake this view, arguing that the goal of the game is to produce software and that documentation is only useful as long as it helps to reach this goal.

SOFTWARE MAINTENANCE

Q.6 Write a short note on Acceptance testing and Regression testing.

Answer: - Acceptance testing: - Acceptance Testing is a level of the software testing process where a system is tested for acceptability.

The purpose of this test is to evaluate the system’s compliance with the business requirements and assess whether it is acceptable for delivery.

ANALOGY

During the process of manufacturing a ballpoint pen,

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