Can a variable be both const and volatile in C?

Question

In large product based companies LLD is written by senior team members and developers write the code.
Does the senior team member decide what data type they should use in advance ? If yes then what things derives type of data for example. How they decide a variable should be declared as volatile ? and what would be advantage of having a variable volatile and what could be the problem if it is taken without the volatile ?

Answer 1

YES

Volatile keyword tells the compiler that the value of the variable can change (may be frequently) so that it can avoid the optimization.

Constant means variable can not be assigned a new value the catch here is using the pointer we can change the value. So when we say a variable is both a constant and volatile that means we are instructing the compiler that the variable can not be assigned a new value and its value can be changed by the use of pointer so don't do any optimization.