For plato I think technical writer is the answer.
Technical writer: As a technical writer, you’ll create user manuals and support guides for a number of computer products and services. You may also develop content to market technical products online.
 
        
                    
             
        
        
        
Answer:
The answer is that it is a speaker note.
Explanation:
It leaves a note for people that use presentation files. I use it all the time on my google slides.
 
        
             
        
        
        
The correct answer is a. (view tab | zoom group).
        
                    
             
        
        
        
Answer:
Place holder
Explanation:
In computer programming, placeholder is a word, character or series of characters that is used to take up the space until the time when the space is actually needed. It is widely used in the sign up or login forms for web and mobile applications. For example, First Name, Last Name etc.
A programmer might have an idea that he will require this number of characters or values but he don't knows what the input will be, that’s why he uses the place holder.
Hope it helps!