Day 3: Python data types, type casting and variables

Question 1

What will be the output of the following code? print(10 + 5 * 2)

30 25 20 15

Question 2

Which statement correctly prints the result of an expression?

print("10 + 5") print(10 + "5") print(10 + 5) print(10, + 5)

Question 3

Which of the following is a float?

10 "10.5" 10.0 True

Question 4

What does the following code return? type("100")

Question 5

What will be the output? x = 5 y = float(x) print(y)

5 5.0 "5.0" Error

Question 6

Why is type casting important in Python?

It speeds up the program It prevents syntax errors It allows operations between different data types It makes variables immutable

Question 7

Which variable name is INVALID?

my_var _value 2number number2

Question 8

What will be the output? Value = 10 value = 20 print(Value)

10 20 Error None

Question 9

Which naming convention is recommended for Python variables?

PascalCase camelCase snake_case kebab-case

Question 10

What will be the output? a, b, c = 1, 2, 3 print(b)

1 2 3 Error

Question 11

What happens here? x = y = z = 5 print(z)

Error None 0 5

Question 12

What will be the output? values = [10, 20] a, b = values print(a + b)

10 20 30 Error

Question 13

What is the data type of this expression? 5 > 3

int float string boolean

Question 14

Which line best demonstrates “real Python logic”?

Copy-pasting code without understanding Memorizing syntax only Understanding how data types affect operations Using AI to write everything

Question 15

Why should beginners focus deeply on Python fundamentals?

Advanced topics become unnecessary It reduces confusion and bugs later Python becomes faster Variables stop changing