Which one of the following is not the application of the stack data structurea.String reversalb.Recursionc.Backtrackingd.Asynchronous data transfer

The option that is not an application of the stack data structure is:

d. Asynchronous data transfer

Explanation:

a. String reversal: Stack data structure can be used to reverse a string. You push the characters of the string one by one into the stack and then pop them out, the order of the characters is reversed.

b. Recursion: Stack is used in recursion as well. When a function calls itself, the local variables are stored on a stack. The local variables are not destroyed when the function call is over.

c. Backtracking: Backtracking is used in many algorithms such as finding the path in a maze, or the knight tour problem, or in the 8 queens problem. In all these cases, we go forward in a certain direction and if that direction does not lead to a solution, we backtrack and try some other direction. This involves a stack.

d. Asynchronous data transfer: This is not an application of the stack data structure. Asynchronous data transfer is a method used in telecommunications to transmit data in which the data can be transmitted intermittently rather than in a steady stream. It does not involve the use of a stack data structure.