Python Method Calls and Lists Slicing Quiz

Python Basics

• The output of int(str(45)) is an integer, which is 45.

Math Module

• The sqrt() function from the math module can be called by import math and then math.sqrt().

String Operations

• The expression 'cad' in 'abracadabra' evaluates to True, indicating that the substring 'cad' is present in the string 'abracadabra'.
• Slicing from index 2 to 3 in a string s can be done using s[2:3].
• A string is immutable in Python, meaning its contents cannot be changed after creation.

Functions and Variables

• The help() function in Python displays the documentation of a module, function, or variable.
• A valid consideration when naming variables in Python is that they cannot start with a digit.
• The correct order of operations for evaluating expressions in Python is PEMDAS (Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction).

Operators and Symbols

• The == operator represents equality comparison in Python.
• The symbol ** is used for exponentiation in Python.
• The \n character is used to represent a new line in Python.

Lists and Dictionaries

• The list.extend(['a', 'b']) code snippet adds the elements 'a' and 'b' to the end of a list.
• Lists are mutable in Python, meaning their contents can be changed after creation.
• When two variables in Python refer to the same list object, changing one variable affects the other.
• The append() method adds a value or string to the end of a list in Python.

Loops and Control Structures

• The for char in s: statement indicates a loop that iterates over each character in the string s.
• The key difference between the for loop and the while loop is that a for loop iterates over a sequence, while a while loop continues to execute until a condition is met.
• The while loop operates by repeatedly executing a block of code while a condition is true.

Functions and Scope

• When the function secret('123') is executed, it will print the result of the function with the argument '123'.
• When the function y() is called after x() following the given code snippets, it may access and modify the same global variables as x().
• A true statement regarding global variables is that they can be accessed and modified by functions.
• Dictionary keys must be immutable data types, such as strings, integers, or tuples.
• The while loop operates by repeatedly executing a block of code while a condition is true.

Test your knowledge on Python method calls and lists slicing with this quiz. Practice identifying the correct syntax for method calls and understanding how to utilize slicing and indexing on lists.