Answer:
subtotal function
Explanation:
The Microsoft Excel SUBTOTAL returns the subtotal of the numbers in the columns in a list or database, and it can be applied horizontally as well as vertically. And the SUBTOTAL function happens to be the built-in function in Excel which is categorized as the Math function or the Trigger function. And like a worksheet function, it can be inserted as a part of the formula inside a cell of a worksheet. Select the columns in a row, or rows in a column, and move to the Data tab in the ribbon. From there,  select the SUBTOTAL, and the function you would like to use, and press ok. And this means here the correct option is the subtotal function.
 
        
             
        
        
        
<u>The first tools that analyzed and extracted data from floppy disks and hard disks were MS-DOS tools for </u><u>IBM</u><u> PC file systems</u>. A file system is a structured representation of data and a set of metadata describing this data. The file system of the IBM supports stream input/output and storage management, providing a structure over all information stored in the system. A floppy disk consists of a thin plastic disk coated with magnetic material (it was designed by IBM in the early 1970s). A hard disk is fixed on the system unit. It is made up of several circular disks called platters. MS-DOS (Microsoft Disk Operating System) is a licensed operating system for use on microcomputers from various manufacturers.
 
        
             
        
        
        
Assigning values at run time
Assigning values as command line argument, before execution of the program
        
             
        
        
        
Answer:
The answer is "except IOError:"
Explanation:
It is part of the exception handling, that stands for input/ output operation fails, this exception aeries when we attempting to access an anti-existent file, in the program so, it will give the program related errors.
- This type of error is handled in the try block, it also allows you to prepare the deal with the exceptional block.  
- It also helps you to hide the bugs by using code, if you handle an unexpected error.
 
        
             
        
        
        
No, it is false. This is mainly because there would be no need.