ExamAdept

What does the dictionary.clear() method do?

A:

Removes a specific key-value pair.

B:

Removes all items from the dictionary.

C:

Clears the values of the dictionary.

D:

Deletes the dictionary itself.

Answer: B

The clear() method removes all items from a dictionary.

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What is the purpose of the dictionary.update(another_dict) method?

A:

Merges the two dictionaries, updating values for common keys.

B:

Adds a new key-value pair to the dictionary.

C:

Removes a key-value pair from the dictionary.

D:

Creates a new dictionary by combining keys and values.

Answer: A

The update() method merges two dictionaries, updating values for common keys.

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How do you create an empty dictionary?

A:

empty_dict = {}

B:

empty_dict = dict.empty()

C:

empty_dict = new Dictionary()

D:

empty_dict = dict()

Answer: A

An empty dictionary in Python can be created using curly braces {}.

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How do you remove a key-value pair from a dictionary in Python without raising an error if the key is not present?

A:

dictionary.remove_key(key)

B:

dictionary.delete(key)

C:

dictionary.remove(key)

D:

dictionary.pop(key, None)

Answer: D

The pop() method with a default value of None removes a key-value pair from a dictionary without raising an error if the key is not present.

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What is the result of the expression len(dictionary.values())?

A:

Returns the number of keys in the dictionary.

B:

Returns the number of values in the dictionary.

C:

Returns the total number of key-value pairs.

D:

Raises a TypeError.

Answer: B

The len() function returns the number of values in a dictionary.

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Questions for: Dictionaries