Exploring Python Data Types and Operations

What are the main built-in data types in Python?

• int, str, complex

• int, float, str, list, tuple, dict, set, bool

• char, float, array

• list, dict, number

Is a list mutable or immutable in Python?

• immutable

• fixed

• mutable

• static

What is the output of the expression 'Hello' + ' World'?

• HelloWorld

• Hello World

• Hello, World!

• Hello World!

How do you access the first character of a string in Python?

• string_variable[1]

• string_variable[0]

• string_variable.charAt(0)

• string_variable.first()

What will be the result of the expression len('Python')?

• 8

• 5

• 6

• 7

Can you change an element in a list after it has been created?

• No, lists cannot be modified after creation.

• Lists are immutable and cannot be changed.

• You can only add new elements to a list.

• Yes, you can change an element in a list after it has been created.

What is the difference between a tuple and a list in Python?

• Lists are faster than tuples in all operations.

• Tuples can be modified after creation, while lists cannot.

• The main difference is that tuples are immutable and lists are mutable.

• Tuples can contain only integers, while lists can contain any data type.

How do you convert a string to lowercase in Python?

• string_variable.convert_to_lower()

• string_variable.toLowerCase()

• string_variable.lowercase()

• string_variable.lower()

What is dynamic typing in Python?

• Dynamic typing restricts variables to a single data type throughout their lifetime.

• Dynamic typing requires explicit type declaration for all variables.

• Dynamic typing means variables must always be of the same type.

• Dynamic typing allows variables in Python to hold values of different types at different times.

How do you check if a substring exists within a string?

• Use 'find' method in JavaScript

• Use 'indexOf' method in Python

• Use 'substring' function in C++

• Use 'in' operator in Python or 'contains' method in Java.