Answer:a) Mainframes, miniframes, PCs, desktop Internet computing, mobile computing
Explanation: The hierarchy of the computers or computing are in the generation is:-
- Mainframe:-designed for the execution of huge data processing , storage and execution.
- Miniframe:-has similar functioning as the mainframe but on smaller scale and version.
- Personal computer(PC):-It is designed for the individual purpose and according the need of the user.
- Mobile computing:-computing that can be done on the mobile phone similar to the computing on the personal computer
- Internet computing:-the computing of the mobile and computer system with the facility of the internet connectivity.
 
        
             
        
        
        
Divide 1210 by 16  and write reminder divide until value zero 
first step divide 1210 by 16 =  10 
then 75 divide by 16 =  11
4 
we can write 4 B A 
in hexadecimal 
        
             
        
        
        
Advntage:
 provides CPU scheduling, memory management, file management, and other operating system functions through system calls. The other one is that it is a single large process running entirely in a single address space.
Disadvantage: if anyone service fails it leads to an entire system failure
 
        
             
        
        
        
<span>The statement that an ISP is a group of updates, patches, and fixes that apply to specific OSs is false.
</span> ISP stands for Internet service provider, while OSS stands for Operations support system.<span> The term ISP denotes a company or</span><span> organization that provides services for accessing, using, or participating in the Internet. OSS on the other hand is used by the providers to manage their networks.
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When you copy cells, cell references automatically adjust. But, when you move cells, cell references are not adjusted, and the contents of those cells and of any cells that point to them may be displayed as reference errors. In this case, you have to adjust the references manually.
If the selected copy area includes hidden cells, rows, or columns, Excel copies them. You may have to unhide data temporarily you don't want to include when you copy information.
Hope this helps! I'm not a computer genius though