Python Fundamentals Quiz (30 Questions)

1. If you define two variables, myVar and myvar, in Python, how does the interpreter treat them?

It treats them as the same variable due to automatic case conversion.
It treats them as two completely distinct and separate variables.
It causes a compilation error because they are too similar.
It automatically overwrites the first variable's value with the second one.

2. Which Python function is used to explicitly convert a value into a **string** data type?

to_string()
str()
string()
char()

3. If you execute x = int('45'), what is the final data type of the variable x?

String
Integer
Float
Boolean

4. What is the primary purpose of the if-else statement in Python?

To define a reusable block of code that performs a specific task.
To repeat a block of code multiple times.
To allow the program to make decisions and execute different code based on certain conditions.
To store multiple data items in a single variable.

5. In the vending machine scenario, what is the data type used to represent the current **stock** of a specific snack item?

String, because the item name is text.
List, to hold all the available items.
Integer, because stock is counted as a whole number.
Boolean, to check if the item is available or not.

6. What is the result of the following Python code snippet?
price = 2.5; money = 3; if money >= price: print('Purchase successful') else: print('Need more money')

Purchase successful
Need more money
Error: Cannot compare integer to float
None (no output)

7. Which of the following is a key characteristic of the **List** data type in Python?

It can only store items of the same data type.
It is immutable, meaning its elements cannot be changed after creation.
It is defined using curly braces {}.
It is an ordered sequence of elements, indexed starting at 0.

8. What is the primary function of the **import** statement in Python?

To define a new function or class within the current script.
To load code (functions, classes, variables) from another Python file or external library into the current program.
To change the data type of a variable.
To print a message to the console.

9. If you have a variable age = 25, which of the following expressions uses a relational operator to check if age is **exactly 25**?

age = 25
age is 25
age == 25
age => 25

10. What is the data type of the value returned by the expression 3 > 5 in Python?

Integer
String
Float
Boolean

11. How should you correctly import only the pi constant and the sin function from the math library?

import math.pi, math.sin
from math import pi and sin
from math import pi, sin
import math (pi, sin)

12. Which of the following is **NOT** a valid Python variable name?

item_Price
1st_item
_total
result7

13. What is the result of applying str() type casting to a list: str([1, 2, 3])?

123
['1', '2', '3']
A list of characters: ['[', '1', ',', ' ', '2', ...]
A single string: "[1, 2, 3]"

14. What is the purpose of the **elif** keyword in a Python conditional block?

It executes code if the initial if statement was true.
It creates a nested conditional statement inside the if block.
It allows for checking multiple conditions sequentially after the initial if.
It is an alternative way to write the final else block.

15. The **String** data type in Python is considered:

Mutable, meaning individual characters can be changed after creation.
Immutable, meaning its content cannot be changed after creation.
Numeric, as strings can represent numbers.
An unordered collection of characters.

16. In a vending machine program, if you need to check if a snack costs less than $1.50 **OR** if the user has a special discount, which logical operator should be used?

AND
NOT
EQUAL
OR

17. What is the purpose of the dot (.) notation when calling a function after an import, such as math.sqrt(9)?

It specifies that the function sqrt must return a floating-point number.
It is used to access members (like functions or variables) that belong to the imported module or object.
It is a concatenation operator for joining the module name and function name as a string.
It separates the function name from its arguments.

18. Given the list data = ['A', 'B', 'C', 'D'], what is the expression to access the letter 'C'?

data[3]
data.2
data(2)
data[2]

19. What is the primary difference between the int and float data types?

An int is for positive numbers, and a float is for negative numbers.
An int stores whole numbers, while a float stores numbers with a decimal component.
An int has a maximum size, but a float can be infinitely large.
An int is a variable, and a float is a constant.

20. If you have a list of expenses expenses = [10.5, 20, 5.0], which type casting function could you use to make the value of the first element an **integer**?

float(expenses[0])
int(expenses[0])
integer(expenses[0])
str(expenses[0])

21. What will be the output of this conditional statement? x = 10; y = 5; if x > y and x < 20: print('A') else: print('B')

B
A
Error
A and B

22. The **string** data type is a sequence of characters enclosed in:

Square brackets []
Curly braces {}
Single quotes '' or double quotes ""
Parentheses ()

23. What happens if you omit the required **indentation** for the code block inside an if statement?

The code runs, but the if statement is ignored.
The code runs, but the if statement automatically converts to a while loop.
The Python interpreter raises an IndentationError or similar syntax error.
The code block is executed regardless of the if condition.

24. Which of the following functions will convert a float like 5.8 into an integer, resulting in the value **5**?

round(5.8)
int(5.8)
floor(5.8)
float_to_int(5.8)

25. What is the purpose of adding as alias_name to an import statement (e.g., import pandas as pd)?

It only imports the pandas library if a library named pd is not already loaded.
It permanently changes the name of the pandas library on your system to pd.
It provides a shorthand or nickname (pd) to use when accessing the library's functions.
It restricts the functions imported from pandas to only those starting with 'pd'.

26. Which of these lines correctly assigns the text 'Hello Python' to a variable named message?

message := 'Hello Python'
message = 'Hello Python'
message == 'Hello Python'
var message = 'Hello Python'

27. What would be the typical conditional check in a vending machine to ensure a chosen item is **in stock**?

if item_price > 0:
if item_stock == 'available':
if item_stock > 0:
if item_code is valid:

28. Which data type is used to represent the value **None** in Python, which often signifies the absence of a value or a null result?

Boolean
String
NoneType
Empty

29. The built-in function **list()** can convert a string like 'Python' into a list of what?

A list with a single element: ['Python']
A list of integers representing ASCII codes.
A list where each character is a separate element: ['P', 'y', 't', 'h', 'o', 'n']
A list that is empty, as strings cannot be converted to lists.

30. Which operator is the correct one to use for checking if two variables, a and b, have **different values**?

a != b
a <> b
a not b
a =! b

🐍 Python Fundamentals Quiz (30 Questions)