What are three different changes that you might be required to perform on existing software??

What will be an ideal response?

You might be called on to implement the following three types of changes to existing software:patch-A software patch is a correction, improvement, or enhancement to software. It corrects a bug, closes a vulnerability, or adds minor enhancements to only part of the software, leaving most of the code untouched. Microsoft sometimes releases a major group of patches to Windows or a Microsoft application, which it calls aservice pack.?upgrade-A softwareupgradeis a major change to a software package that enhances the functionality and features of the software, while also correcting bugs and vulnerabilities. When a patch or upgrade is applied to device drivers, it is called adriver update.?rollback-A softwarerollback, also calledbacklevelingordowngrading, is the process of reverting to a previous version of software after attempting to patch or upgrade it.?