Keywords & Identifiers

What is an identifier in Python?

• A unique name given to variables, functions, classes, etc.
• A special symbol used in Python
• A type of data structure in Python
• A Python library for data analysis

Which of the following is a valid Python identifier?

• 1st_name
• my-name
• my name
• _my_name

How are Python keywords different from identifiers?

• Python keywords are predefined words, while identifiers are user-defined
• Python keywords and identifiers are the same
• Python keywords are user-defined words, while identifiers are predefined
• Python keywords can be used as variable names, but identifiers cannot

Which of the following is a Python keyword?

• append
• def
• concatenate
• merge

How many keywords does Python have?

• 16

• 28

• 33

• 8

Can a Python identifier start with a digit?

• Yes, but only if it's followed by an underscore (_).

• Yes, there's no restriction on starting with a digit.

• No, a Python identifier cannot start with a digit.

• Only if it's within a class definition.

Which of the following is not a valid way to create a Python identifier?

• Starting the identifier with a number
• Starting the identifier with an underscore
• Using numbers in the identifier

• Using both underscores and numbers in the identifier

Which function can be used to check if a given string is a Python keyword?

• is_keyword(str)

• keyword.iskeyword(str)

• str.is_keyword()

• keyword_check(str)

What happens if you try to use a Python keyword as an identifier?

• It will work without any issues
• Python will automatically rename the identifier
• It will cause a syntax error
• Python will ignore the keyword

Which keyword is used to define a function in Python?

• class
• def
• block
• func