Which aggregate function can be used to find the cardinality of a table ?

1. sum()
2. count()
3. avg()
4. max()

Which protocol is used to transfer files over the Internet ?

1. HTTP
2. FTP
3. PPP
4. HTTPS

Which switching technique breaks data into smaller packets for transmission, allowing multiple packets to share the same network resources.

Assertion (A): Positional arguments in Python functions must be passed in the exact order in which they are defined in the function signature.

Reasoning (R): This is because Python functions automatically assign default values to positional arguments.

1. Both A and R are true, and R is the correct explanation of A.
2. Both A and R are true, and R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.