The answer is A B AND D mark me brainliest?
        
                    
             
        
        
        
Answer:
C. X-ray
Explanation:
AWS X-ray is a form of service that assists developers in carrying out analysis and debugging functions, and at the same time helps in the allotted applications, including those built using a microservices architecture.
In other words, an X-ray, in this case, will assist the developers in carrying out the following:
1. Establish a service map
2. Single out errors and bugs
3. Construct analysis and visualization apps
4. Enhancing the experience for end-users of the application under x-ray.
 
        
             
        
        
        
Answer: star topology.
Explanation:
The layout of the way how the computers in a netword are interconnected is called network tipology.
Some types of network topologies are:
1) Point-to-point tipology: all the computers are connected to each other directly (computer-to-computer, in pairs, this is a direct link between each two computers).
2) Bus topology: all the nodes (computers or server) are connectect to a maing cable.
3) Star topology: all the computers are connected to a central computer or server which is called central hub. This is the layout described in the question.
4) Ring topology: the computers are connectec in a circular path; each computer is connected to the next computer.
5) Mesh: every computer is connected to every other computer.
        
                    
             
        
        
        
Answer:
 Commands: commands are also known as "programs" and the program is a set of rules that performs a specific task which is executed by a computer.
Unix is an operating system. that supports multi-tasking and multi-user functionality. Unix is most widely used in all forms of computing systems such as desktop, laptop, and servers. It provides a Graphical user interface similar to windows.
The Unix operating system there are various commands. The list of five Unix commands can be given as:
1) cal
2) date
 3) banner
4) who
 5) whoami
 
1)cal:
 The cal command stands for calender. It displays the date.
Syntax: 
$ cal 
or
$ cal [[month] year]
Example:
$ cal 10 2019
2)date:
 The date command stands for date and time. It displays the system date and time.
Syntax: 
$date
or
$ date[+format]
Example:
$ date +%d/%m/%y 
 3) banner
The banner command stands for display the text in to a large size.
Syntax: 
$banner message
Example:
$banner Unix
4) who
The who command stands for display the list of users currently logged in.
Syntax: 
$who
or
$who [option] … [file][arg1] 
Example:
$who 
 5) whoami
The whoami command stands for display the user id of the currently logged-in user.
Syntax: 
$whoami
Example:
$whoami 
Explanation:
1)cal command display the current month and year.
2)date command display system date and time.
3)banner command display text in large size. 
4)who command display the user name who currently login.
5)whoami command display user id.