1. What are different file stream classes? Explain the syntax of opening the file in read and write mode. Can while(fin) be replaced with if(fin1.eof()!=0) to process the file? Justify. 2. What is initializer lists? Explain with suitable example.

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A: STREAM OBJECTS FROM NON-FILE SOURCES IS:-

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Stack operations

A stack is a linear data structure that follows certain order to perform the operation; the order will be LIFO (Last In First Out) data structure. In the stack data structure elements/items are removed and added only from the top. The topmost stack item/element is pointed by the top pointer and the element which is added to the stack first will get deleted at the last.