Python Fundamentals

What is the difference between a variable and a data type in Python?

• A variable is a type of data, while a data type is a specific value in Python.

• A variable is a name that refers to a value, while a data type specifies the type of data that a variable can hold.

• A variable and a data type are the same thing in Python.

• A variable is used for storing data temporarily, while a data type is used for performing operations in Python.

How do you write an if-else statement in Python?

• if (condition) then { // code block } else { // code block }

• if (condition) { // code block } else { // code block }

• if condition { // code block } else { // code block }

• if condition: # code block else: # code block

Explain the purpose of a function in Python and give an example.

• The purpose of a function in Python is to display a message on the screen. For example, print('Hello, World!')

• The purpose of a function in Python is to encapsulate a set of instructions that can be called multiple times to perform a specific task. For example, a function to calculate the area of a circle can be defined as follows: def calculate_area(radius): return 3.14 * radius * radius

• The purpose of a function in Python is to define a variable. For example, x = 5

• The purpose of a function in Python is to create a loop. For example, for i in range(5):

How would you add element to an existing list?

• Using a function called append()

• by writing the name of the list and element together

• add_element() function

• A list cannot be further modified.

How do you concatenate two strings in Python?

• string1 . string2

• string1 * string2

• string1 + string2

• string1 - string2

Write a for loop that prints numbers from 1 to 10.

• for num in range(1, 11): print(num + 1)

• for num in range(1, 10): print(num)

• for num in range(10): print(num)

• for num in range(1, 11): print(num)

Write a while loop that counts down from 10 to 1.

• while count > 0: print(count) count -= 1

• count = 10 while count > 0: print(count) count = count - 1

• for i in range(10, 0, -1): print(i)

• while count < 10: print(count) count += 1

What are the different types of operators in Python?

• Arithmetic, Comparison, Logical, Assignment, Bitwise, Membership, Identity

• Addition, Subtraction, Multiplication, Division

• Equals, Not Equals, Greater Than, Less Than

• If, Else, While, For

What is the purpose of using a dictionary in Python?

• To store data in key-value pairs

• To perform mathematical operations

• To create loops for iteration

• To define variables and data types

Write a Python function to calculate the factorial of a number.

• def factorial(num): result = 1 for i in range(1, num + 1): result *= i return result

• def factorial(num): result = 0 for i in range(1, num + 1): result += i return result

• def factorial(num): result = 1 for i in range(1, num): result *= i return result

• def factorial(num): result = 1 for i in range(1, num + 1): result += i return result