Question

You are a software developer for a Retail Point of Sale System Company. A client has made a request to upgrade the current system from command line interface to a graphic user interface. The client concerns on an effect to the current system with the change. The client does not want to lose any current data on the system. Provide recommendations and the change plan including the below requirements to the customer.
a. Create a requirement plan (what need to be done to support this upgrade)
b. Create a development plan (how to implement this upgrade with programming details explanation including technical details on this document)
c. Create testing plan (how to ensure that the new upgrade works without affecting current system and no data lost.)

Answer 1

Answer:

The recommendations to be provided for the customer and the change in plan before upgrade are: Check system requirements, Check the specifications, Problems that are existing and detected should be resolved before upgrade, Run a normal maintenance routines, Having backup plan

Explanation:

Solution

Command line interface is a way of working  with a computer program where the user gives out  commands to the program in a method called successive lines of text.

The Graphic user interface is a type of interface that enables users to interact with electronic devices through visual indicators. and graphical icons .

As a software developer, if a request comes to upgrade the system from CLI to GUI. Then, there are a number of necessary points which should be considered and also having a plan which is stated below:

First thing  that should be carried is a feasibility study. We need to check whether the upgrade which is required by the client is feasible or not.

There can be a number of issues in the way like resource, technical constraints, budgetary constraints

So as a software developer, we need to examine each  of them before Going further.

Check System Requirements: Think not only the  system requirements, but also OS  present configuration and any i software installed you use.

Check the specifications:  The first thing is to check Specification. this is an important  true requirement for upgrading, which  is to guarantee  your system meets the basic system requirements for running GUI

Existing problems should be detected and resolved:  before upgrade. also, ensure that your system is not experiencing any major issues currently

Run Normal maintenance routines

Backup: To ensure the security of data, to prevent data loss and to avoid expensive recovery there is nothing that is not better than a  backup.

The Golden rule or number one rule is Data backup.

Before upgrading any system, make sure that your personal, critical, ,irreplaceable data is safely backed up fully to an external device, like an external hard drive ,USB disk, DVD, etc.  

Again, don't even try to attempt to upgrade before doing this  important step. another way is creating a clone system or  RAID (Redundant array of independent disks).

Then upgrade can begin. then in this particular order of upgrade,the remote secondary replica nodes first, then local secondary replica node is second , and the primary replica node third.