UGC NET JULY 2018 (Computer Science And Applications Paper-II) (Question 18)

UGC NET JULY 2018 (Computer Science And Applications Paper-II) (Question 18)

Q18. Reasons to re-engineer a software include :

P  : Allow legacy software to quickly adapt to the changing requirements.
Q : Upgrade to newer technologies/platform/paradigm (for example, object-oriented).
R : Improve software maintainability.
S  : Allow change in the functionality and architecture of the software.

Code:
(1).  P, R and S only                                                          (2).  P and R only  
(3).  P, Q and S only                                                          (4).  P, Q and R only

Answer : (4).  P, Q and R only

Software Re-engineer is a process of software development which is done to improve the maintainability of a software system. Technical Definition: Software Re-engineering is the examination and alteration of a system to reconstitute it in a new form.

The statement P is true because in re-engineering we can quickly adapt new changes which are required for software.

Q statement is also fine because new technology can be added to software by using software re-engineering. For example, changing function-oriented programs into object-oriented programs.

R statement is also true Refactoring is a re-engineering technique that aims at reorganizing a program without changing its behavior. It seeks to improve a program structure and its maintainability.

The statement Q is not included for Software re-engineering, No new functionality is added to the system but it is restructured and reorganized to facilitate future changes