Dictionaries are also called ……………

1. mappings
2. hashes
3. associative arrays
4. all of these

Dictionaries are …………. data types of Python.

1. mutable
2. immutable
3. simple
4. all of these

Which of the following will add a key to the dictionary only if it does not already exist in the dictionary ?

1. fromkeys( )
2. update( )
3. setdefault( )
4. all of these

Which of the following will create a dictionary with given keys and a common value ?

1. fromkeys( )
2. update( )
3. setdefault( )
4. all of these