How would you determine the modularity of a program? Solution Modularity refers to the extent to which a software/Web application may be divided into smaller modules. Software modularity indicates that the number of application modules are capable of serving a specified business domain. Software engineering modularity allows typical applications to be divided into modules, as well as integration with similar modules, which helps developers use prewritten code. Modules are divided based on functionality, and programmers are not involved with the functionalities of other modules. Thus, new functionalities may be easily programmed in separate modules. so modularity of a program is determined by the number of modules are present the source code or program , those modules are divided on functionality and on account of different purpose they are supposed to serve..