Which command is used to retrieve all the keys from a dictionary?

Which command is used to retrieve all the keys from a dictionary?

• A. keys()
• B. get_keys()
• C. retrieve_keys()
• D. all_keys()

Answer: (A)

The command used to retrieve all the keys from a dictionary in Python is the `keys()` method. When you invoke `dict.keys()` on a dictionary object, it returns a view object that displays a list of all the keys present in that dictionary. This is a built-in method specifically designed for this purpose, making it easy for programmers to access the keys without needing to iterate through the dictionary manually. The alternative options do not correspond to any existing methods in Python's dictionary object. For instance, `get_keys()`, `retrieve_keys()`, and `all_keys()` are not defined methods for dictionaries, and attempting to use them would result in an error. Thus, the `keys()` method stands out as the correct choice for retrieving all keys from a dictionary.

The command used to retrieve all the keys from a dictionary in Python is the keys() method. When you invoke dict.keys() on a dictionary object, it returns a view object that displays a list of all the keys present in that dictionary. This is a built-in method specifically designed for this purpose, making it easy for programmers to access the keys without needing to iterate through the dictionary manually.

The alternative options do not correspond to any existing methods in Python's dictionary object. For instance, get_keys(), retrieve_keys(), and all_keys() are not defined methods for dictionaries, and attempting to use them would result in an error. Thus, the keys() method stands out as the correct choice for retrieving all keys from a dictionary.