Python for Data Analysis Quiz-6

What is a dictionary in Python?

• A collection of ordered elements

• A collection of key-value pairs

• A collection of integers

• A collection of strings

How do you access the value associated with a specific key in a dictionary?

• Using indexing

• Using a for loop

• Using a while loop

• Using the key itself

Which of the following is not a valid key data type for a dictionary in Python?

• Integer

• Float

• String

• List

What happens if you try to access a key that does not exist in a dictionary?

• It raises a KeyError

• It returns None

• It creates the key with a default value

• It raises an IndexError

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

• Using the `append` method

• Using the `insert` method

• Using the `update` method

• Using the assignment operator

Which of the following is the correct way to create a multi-line string in Python?

• "This is a multi-line string."

• 'This is a multi-line string.'

• '''This is a multi-line string.'''

• "This is a\nmulti-line string."

What does the `len()` function return when applied to a string in Python?

• The number of words in the string

• The number of characters in the string

• The number of lines in the string

• The number of vowels in the string

Which of the following methods can be used to convert a string to lowercase in Python?

• `to_lower()`

• `lowercase()`

• `lower()`

• `convert_lowercase()`

What is the result of the following code?

python

text = "Hello, World!"

print(text.split(","))

• ['Hello', ' World!']

• ['Hello', 'World!']

• ['Hello,', ' World!']

• ['Hello World!']

How do you check if a string starts with a specific prefix in Python?

• Using the `endwith` method

• Using the `startswith` method

• Using the `begin` method

• Using the `isprefix` method