Q.Given the following Tuple Tup=(10, 20, 30, 50) Which of the following statements will result in an error?

Concept: Tuple immutability in Python.

Tuples are immutable sequences — once created, their elements cannot be added, removed, or modified. All read operations (indexing, slicing, len()) work normally, but methods that attempt to change the tuple will fail.

Checking each statement:

1. print(Tup[0]) — indexing retrieves the first element 10. Valid.
2. Tup.insert(2,3) — insert() is a list method that modifies the sequence. Tuples have no insert() method because they are immutable. This raises an AttributeError. …

Tuples are one of Python's fundamental sequence types, alongside lists. The critical difference: tuples are immutable. Once you create a tuple, you cannot add, remove, or change its elements. Lists, on the other hand, are mutable and support methods like append(), insert(), remove(), and so on. This is a favourite trap in CBSE Class 12 Computer Science MCQs.

This immutability means tuples support only operations that read or access data — indexing, slicing, length calculation — but reject any operation that would modify the structure.

Let's examine each statement against the tuple Tup = (10, 20, 30, 50):

1. print(Tup[0]) — Indexing

   This accesses the element at index 0, which is 10. Indexing is a read-only operation; it doesn't modify the tuple. This works perfectly and prints 10.

2. Tup.insert(2, 3) — Attempted insertion

   The insert() method is a list method that adds an element at a specified position. Tuples do not have this method because insertion would modify the tuple, violating immutability. Python raises:

   AttributeError: 'tuple' object has no attribute 'insert'
   

   This statement results in an error.

3. print(Tup[1:2]) — Slicing …