Understanding Python Basics

What are the basic data types in Python?

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

• string, number, boolean, collection

• char, decimal, array, object

• integer, double, character, map

How do you declare a variable in Python?

• variable_name : value

• You declare a variable in Python by using the syntax: variable_name = value.

• declare variable_name as value

• value = variable_name

What is the difference between '==' and '===' in Python?

• In Python, '==' checks for value equality, while '===' does not exist.

• '==' checks for type equality, while '===' checks for value equality.

• '===' is a valid operator in Python for comparing objects.

• Both '==' and '===' are used for strict comparison in Python.

What operator is used for exponentiation in Python?

• ^

• **-

• **

• **/

How do you append an item to a list in Python?

• Use the append() method, e.g., my_list.append(item).

• Use the extend() method, e.g., my_list.extend(item).

• Use the insert() method, e.g., my_list.insert(item).

• Use the add() method, e.g., my_list.add(item).

What method would you use to sort a list in Python?

• Use the 'filter()' method

• Use the 'sort()' method or the 'sorted()' function.

• Use the 'map()' function

• Use the 'append()' method

What is the main difference between a list and a tuple?

• Lists can contain only numbers, while tuples can contain any data type.

• Tuples are used for dynamic data, while lists are for static data.

• Lists are faster than tuples in all operations.

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

Can a tuple contain mutable objects? Give an example.

• No, tuples cannot contain any objects at all.

• Yes, a tuple can contain mutable objects. Example: (1, 2, [3, 4]) where [3, 4] is a mutable list.

• Yes, but only if the mutable objects are nested within another immutable structure.

• No, a tuple can only contain immutable objects.

How do you access a value in a dictionary using its key?

• Use dictionary_name[key] to modify the value.

• Use dictionary_name[key] to access the value.

• Use dictionary_name.get(key) to retrieve the value.

• Access the value by calling dictionary_name.key() method.

What method would you use to remove a key from a dictionary?

• Use 'remove()' method

• Use 'del' or 'pop()' method.

• Use 'insert()' method

• Use 'add()' method