Which of the functions are not performed by the Turing machine after reading a symbol?ans.none of the mentionedwrites the symbolmoves the tape one cell left/rightproceeds with the next instruction or halts

The Turing machine performs all of the following functions after reading a symbol:

1. Writes the symbol: The Turing machine has a tape head that can read and write symbols on the tape.

2. Moves the tape one cell left/right: After reading or writing a symbol, the Turing machine moves the tape one cell to the left or right.

3. Proceeds with the next instruction or halts: The Turing machine follows a set of instructions. After performing an action, it proceeds to the next instruction or halts if there are no more instructions.

Therefore, the answer is "none of the mentioned" because all of these functions are performed by the Turing machine after reading a symbol.