IT 403 - Quiz 1

In Python, the expression 0.1 + 0.2 == 0.3 evaluates to False due to floating-point precision issues, and this can be solved by using a small tolerance value for comparison.

• True

• False

When using the input() function in Python, if a user enters the number 42, the function returns an integer value that can be directly used in mathematical operations.

• True

• False

In Python, the statement x = y = z = 10 creates three separate objects in memory, each containing the value 10.

• True

• False

The continue statement in a nested loop will exit both the inner and outer loops and continue with the code after the outer loop.

• True

• False

List slicing in Python never raises an IndexError, even when indices are out of bounds, but direct indexing (like list[10] on a 5-element list) will raise an error.

• True

• False

A developer needs to store a file path on Windows. Which approach is most appropriate?

• A. path = "C:\Users\Documents\file.txt"

• B. path = "C:\\Users\\Documents\\file.txt"

• • C. path = "C:/Users/Documents/file.txt"

• Both B and C are equally appropriate

What is the primary reason Python uses indentation instead of braces for code blocks?

• To reduce file size

• To enforce readable code structure

• To make the interpreter faster

• To prevent syntax errors

When would you use the underscore variable _ in Python?

• To create private variables

• To store important calculation results

• To indicate a throwaway value you won't use

• To define constants

What happens when you modify a global variable inside a function without the global keyword?

• The global variable is modified directly

• Python creates a new local variable with the same name

• A syntax error occurs

• The program crashes at runtime

Which data type conversion is safe to perform without validation when receiving user input?

• int(input())

• float(input())

• str(input())

• None of the above require validation