Answer:
The answer is "Option D".
Explanation:
A system or a group of components that communicate with your environment through the sharing of resources, materials, and knowledge with a view to system regeneration and development is known as an Open system. In other words, we can say that it is a system that includes a non-proprietary hardware and advert-based software which enables third parties to add or interact with products to plug in the system and It is freely available on the internet. In this question, the incorrect options can be described as follows:
- In option A, The management system is used by an organization. It is a paid system that's why it is not correct.
- In option B, This system enables users in online communities and evaluates one another that's why it is not correct.
- In option C, This type of system provides resources for upgrade user knowledge. It is a paid system that's why it is not correct.  
 
        
             
        
        
        
Answer:
Command Operations
Explanation:
Space Operation specialist requires special training for aircraft and its operations along with satellite controls. Initially when a graduate joins the training he is required to understand command operations of aircraft. He can then use his skills to learn command operation of spacecraft and then will be promoted to learn satellite controls.
 
        
             
        
        
        
<u>Virus outbreaks in an organization:</u>
In an organization end user who uses the computer or laptop or workstation is not aware of virus outbreaks. So As IT administrator of an organization she/he has aware of latest virus attack and rectification solution before outbreaks.
Common causes for this virus outbreaks problem is update virus definition or database. Update operating system patches on regular basis.
Installation appropriate anti-virus in each workstation or desktop or laptop and scheduling virus scanning and take necessary steps.
To address and troubleshoot disconnect workstation and desktop or laptop from LAN. Uninstalled unnecessary software, delete temp folder contents.