4.2 There are two types of strategy and both the approaches are useful and can be used in different cases. First one is an incremental strategy in which you plan a part of the process and then you execute it after that you take next part of the process. The second one is a grand strategy in which you plan the whole process at a single go and according to it, you execute your process.
these two strategies are used at a different time like suppose you have a client who is not sure about what is a process and he does not have a clear vision about its product then we will use the increment strategy which will work step by step.
5.1 There are two things you can do for system testing, is to run an automated script which will check all the functions and other things is test all the software manually on how it’s working.
5.2 firstly the application security should be top-notch so that no hacker can access the user information. another thing is you can do is consider all the standard safety margin which is required for that particular application.
6.1 managing a complex and large project are somewhat tricky so the best practice is to divide the project and every part of the project should have a different project manager and there should be head project manager which manages all the things. you can use tools like Salesforce, AWS etc.
6.2 No, the most project does not complete on time. Because sometimes the company who is building tends to work slow and sometimes the client does not give all the resources which are required for that project.
7.1 security is considered to be one of the most important parts of the development because the user data and the application are considered to be the most important things which should be safe. so safety is important and due to this design process and overall testing process changes but it worth it because security is important.