vl Mastering Python Concepts

What are the basic data types in Python?

• int, decimal, vector

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

• float, string, map

• char, set, array

How do you declare a variable in Python?

• declare variable_name as value

• variable_name : value

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

• value = variable_name

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

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

• Lists are faster than tuples in all operations.

• Tuples are created using square brackets and lists using parentheses.

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

How do you convert a string to an integer in Python?

• Apply float('string') for conversion to integer.

• Use str('string') to convert a string to an integer.

• Use eval('string') to get an integer from a string.

• Use int('string') to convert a string to an integer.

What is the purpose of the 'if' statement in Python?

• To execute code conditionally based on a boolean expression.

• To define a function in Python.

• To create a loop in Python.

• To import modules in Python.

Explain the use of 'elif' in control structures.

• The 'elif' statement cannot be used with 'if' statements.

• The 'elif' statement is used to specify additional conditions in control structures, allowing for multiple conditional checks.

• The 'elif' statement is only used in loops.

• The 'elif' statement is used to end a control structure.

What is a for loop and how is it used in Python?

• A for loop is a type of variable in Python.

• A for loop is used to define functions in Python.

• A for loop is a method for creating classes in Python.

• A for loop is a control flow statement that allows code to be executed repeatedly for each item in a sequence.

How do you create a dictionary in Python?

• To create a dictionary, use the dict() function: my_dict = dict(key1='value1', key2='value2').

• You can create a dictionary using square brackets, like this: my_dict = ['key1': 'value1', 'key2': 'value2'].

• Dictionaries are created with parentheses, for example: my_dict = ('key1', 'value1', 'key2', 'value2').

• You can create a dictionary in Python using curly braces, like this: my_dict = {'key1': 'value1', 'key2': 'value2'}.

What is the output of the expression 5 // 2 in Python?

• 2.5

• 3

• 1

• 2

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

• '==' is used for comparing types, while 'is' is used for checking values.

• The '==' operator checks for value equality, while 'is' checks for object identity.

• Both '==' and 'is' check for value equality.

• '==' checks for object identity, while 'is' checks for value equality.