Answer:
B) To package a repeated task as a function even though the task does not yield a value
Explanation:
The purpose of a function that returns "void" is to package a repeated task as a function even though the task does not yield a value. Since the function does not return any value, it control returns to the caller. 
 
        
             
        
        
        
Answer:
Simply put: A callback is a function that is to be executed after another function has finished executing — hence the name 'call back'. ... Functions that do this are called higher-order functions. Any function that is passed as an argument is called a callback function.
Explanation:
 
        
             
        
        
        
Answer:
I have got no idea it looks like an older style 
 
        
                    
             
        
        
        
Answer:
option A ) true is right answer.
 
        
             
        
        
        
<span>The statement that "Persons who have been given access to an installation can be counted on to be of no threat" is false. If they are not honest enough, they could become the dangerous staff the company could ever had because he or she has access to everything, files, information, etc. That is why, in selecting a person to be trusted with such responsibility, he or she undergoes an intensive training.</span>