Question 17

After `a = "sun"` and `b = a + "set"`, which statement is correct?

`b` is `sunset`, while `a` remains `sun`.Correct answer
Both `a` and `b` become `sunset`.
The operation performs numeric addition after conversion.
The operation raises TypeError because strings cannot use plus.

Explanation

String addition creates the new value `sunset` and binds it to `b`; the immutable object referred to by `a` remains `sun`. The idea that the left operand grows in place would require mutable string contents, which Python does not provide.

Explanation

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