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Python Dictionary Introduction

Question 1

What is a dictionary in python?

A collection of ordered elements.

A collection of key-value pairs.

A sequence of numbers.

A list of characters.

Question 2

What is the difference between dict and list in python?

Dictionaries are ordered, and lists are not.

Dictionaries can only store integers, while lists can store any data type.

Lists use square brackets [ ], and dictionaries use curly braces { }.

Lists are immutable, and dictionaries are mutable.

Question 3

Which of the following statements about dictionary keys is true?

Keys must be unique and can be of any data type.

Keys must be unique and can only be strings.

Keys can be duplicated and can only be integers.

Keys can be duplicated and can only be floats.

Question 4

Which of the following is a valid way to create an empty dictionary in python?

my_dict={}

my_dict=dict()

Both A and B.

None of the above.

Question 5

How are dictionaries denoted in python?

By square brackets [ ].

By parentheses ( ).

By curly braces { }.

By angle brackets .

Question 6

What happens if you try to access a key that doesnt exist in a dictionary?

Python raises an IndexError.

Python raises a KeyError.

Python returns None.

Python creates a new key with that name.

Question 7

How do you add a new key-value pair to an existing dictionary in python?

Using the add() method.

Using the insert() method.

Using the append() method.

By assigning a value to a new key.

Question 8

How can you check if a key exists in a dictionary?

Using the exists() method.

Using the contains() method.

Using the in keyword.

By comparing the key to None.

Question 9

Which method can you use to remove a key-value pair from a dictionary?

delete()

remove()

pop()

discard()

Question 10

What does the keys() method return in a dictionary?

The values of all keys.

The keys of the dictionary as a list.

The number of keys in the dictionary.

The values of all items.

Name

Email

Phone

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Python Set Comprehension

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Python Dictionary Accessing elements

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