Answer:
title slide
title and content
blank
picture with caption
Explanation:
Slide layouts contain boxes known as placeholders that bear the contents of a slide. They allow users to format, and position content. Colors and fonts are also available. Text, titles, pictures, video, audio, graphics, etc., can be attached to the placeholders. Layouts are adjustable according to the preferences of the user.
 There are also features that the sharing of these layouts with other users. To select a layout to be used, the user goes to Home and chose Layout which then supplies the different options. 
 
        
             
        
        
        
I guess the correct answer is concurrency control
Cοncurrеncy cοntrοl is a databasе managеmеnt systеms (DBMS) cοncеpt that is usеd tο addrеss cοnflicts with thе simultanеοus accеssing οr altеring οf data that can οccur with a multi-usеr systеm.
In database systems, the DBMS enforces rules about which user can perform which action when. The rules are known as concurrency control.
 
        
             
        
        
        
I think its c I hope I'm not wrong about this If I am I'm sorry 
 
        
             
        
        
        
Answer:
321Go
Explanation:
The identifiers in C, C++, C#, Java and other programming languages are a combination of letters, numbers and the underscore symbol.  The laters versions of C and C++ allows you to use almost all Unicode characters. In Java, you can use also the dollar sign. 
From that you have to be careful to follow these rules:
-Don't use keywords.
-Don't include white spaces.
-Don't use operators.
-Don't repeat identifiers.
-Don't start your identifier with a number.
-Don't use two consecutive underscores.
So app_234, happyTimesAhead, and cis22B are follo wing these rules but 321Go starts with a number.