Computer Science questions for CBSE XII

Which of the following is an immutable data type in Python?

Which string method returns True if all characters in the string are alphanumeric (letters or numbers) and there is at least one character?

In Python file handling, what does the statement f.seek(-10, 2) do in a binary file?

Which Python list method is most efficient (O(1) time complexity) to simulate the PUSH operation at the top of a Stack?

Candidate keys which are NOT selected as the Primary Key of a relation are known as:

Which SQL keyword is used with SELECT to eliminate duplicate rows from the query result set?

In mysql.connector, which cursor method retrieves at most 'n' rows from the result set of an executed SELECT query?

Which guided transmission medium transmits data as pulses of light through glass or plastic cores and is completely immune to electromagnetic interference (EMI)?