ExamAdept

What does the expression len(dictionary.items()) return?

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: C

The items() method returns a list of key-value pairs, and len() returns the number of items, which is the total number of key-value pairs.

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What is the purpose of the dictionary.pop(key, default_value) method?

A:

Removes the specified key from the dictionary.

B:

Raises a KeyError if the key is not present.

C:

Removes the specified key and returns its value, or returns the default value if the key is not present.

D:

Adds a new key-value pair with a default value.

Answer: C

The pop() method with a default value removes the specified key and returns its value, or returns the default value if the key is not present.

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How do you check if a specific value exists in the values of a dictionary?

A:

if value in dictionary:

B:

if value.exists_in(dictionary.values()):

C:

if value.contains(dictionary.values()):

D:

if dictionary.contains_value(value):

Answer: A

The in keyword is used to check if a specific value exists in the values of a dictionary.

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What does the dictionary.pop(key, None) method do?

A:

Removes the specified key from the dictionary.

B:

Raises a KeyError if the key is not present.

C:

Removes a random key-value pair from the dictionary.

D:

Removes the specified key and returns its value, or returns None if the key is not present.

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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How do you extract all values from a dictionary and store them in a list?

A:

values_list = dictionary.get_values()

B:

values_list = list(dictionary.values())

C:

values_list = dictionary.extract_values()

D:

values_list = dictionary.all_values()

Answer: B

The values() method is used to extract all values from a dictionary, and list() is used to convert it into a list.

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Questions for: Dictionaries