Python: Data Types - Strings, Integers, Booleans

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Questions and Answers

Which of the following scenarios demonstrates the most critical need to differentiate between an integer and a string data type?

Displaying a user's age on a profile, where either '25' (string) or 25 (integer) would render visibly the same.
Calculating the sum of product prices in a shopping cart, ensuring accurate arithmetic operations. (correct)
Presenting a binary choice (True/False) to a user, where 'True' (string) or True (boolean) can be equally understandable.
Storing a phone number, where the leading zero is significant and must be preserved.

Consider the following Python code:

x = 'False'
y = False
print(x == y)

What is the output of this code, and why?

Error, because Python cannot compare a string and a boolean.
False, because the equality operator checks both value and data type. (correct)
True, because the string 'False' is interpreted as a boolean value.
True, because the values are identical regardless of type.

Which of these statements correctly describes the use of single and double quotes in Python strings?

Single quotes are used when a string contains double quotes, and vice versa, to avoid syntax errors.
Single quotes are used for single-character strings, while double quotes are for multi-character strings.
Single quotes and double quotes can be used interchangeably to define strings, but must be consistent within the same string. (correct)
Double quotes are used for strings containing variables, single quotes for constant strings.

Given the following Python code:

value = '3.14'
result = value + 10
print(result)

What will happen when this code is executed?

The code will raise a TypeError because you cannot add a string to an integer. (B) Signup and view all the answers

In Python, what is the primary distinction between a variable assigned `True` (boolean) and a variable assigned `'True'` (string)?

The boolean <code>True</code> can be used in logical operations, while the string <code>'True'</code> cannot. (B) Signup and view all the answers

Consider this Python code:

num_str = "123"
num_int = int(num_str)
result = num_str * 2 + num_int * 2
print(result)

What will be the output?

<code>123123246</code> (D) Signup and view all the answers

What is the outcome of the following Python code snippet?

x = 10
y = "10"
print(x is y)

<code>False</code>, because <code>x</code> and <code>y</code> have different data types. (D) Signup and view all the answers

You're debugging a Python script where a function should return a boolean value indicating success or failure. Instead, the function sometimes returns the string `'True'` or `'False'`. What is the most critical issue this inconsistency can cause?

Conditional statements relying on the function's return value may behave unexpectedly, as non-empty strings are truthy in Python. (B) Signup and view all the answers

Flashcards

Data Types

Different kinds of information stored in variables that tell the computer how to use the variable.

String

A text value, which is created by wrapping a variable's value in quotes.

Integer (int)

A whole number without any decimal places. No quotation marks needed.

Boolean

A value that can be either True or False. Note that the first letter of True and False MUST be capitalized in Python.