The file command provides information about any file system object (i. e., file, directory or link) that is provided to it as an argument (e. g., # file filename would return information about the file filename). What following expressions would return?

a. # file ???
b. # file *
c. # Is '.html *.txt
d. # Is *???

The answer is "Option a, c, and d".

Explanation:

This command aims to define the argumentation from each entity of the file system like a disc, path, or link. It checks the usage of a measurement system, which is requested to collect the information from either the inode of the item, the description of the option as follows:

In option a, It is used to identify the file type. In option c, This command is used to list all file types. In option d, This command is used to list all the current directories. In option b, It is used to describe a single entity directory.

This question would take to long to answer

Cprogram to find //perimeter of rectangle printf(" \n perimeter of rectangle \n"); printf(""); printf("\n enter width and length of the rectangle : "); scanf("%f%f", & width,& length); perimeter = 2 * (width + length); printf("perimeter of rectangle is: %.3f", perimeter);