Week 5 Homework

What is the purpose of a function in Python?

• To store data

• To perform a specific task

• To create loops

• To define a variable

What is the result of the expression: 5 + 3 * 2?

• 10

• 16

• 11

• 13

Which of the following is a valid variable name in Python?

• my_variable

• 123variable

• variable#1

• 1_variable

Answer explanation

• A variable name must start with a letter or the underscore character

• A variable name cannot start with a number

• A variable name can only contain alpha-numeric characters and underscores (A-z, 0-9, and _ )

• Variable names are case-sensitive (age, Age and AGE are three different variables)

How do you add an element to the end of a list?

• list.add(element)

• list.append(element)

• list.insert(element)

• list.extend(element)

What is the output of len([1, 2, 3, 4])?

• 4

• [1, 2, 3, 4]

• 6

• 5

Which data structure uses key-value pairs?

• Lists

• Tuples

• Dictionaries

• Sets

In a tuple, can you change the value of an element after it's created?

• Yes

• No

What is the purpose of using a set in Python?

• To store ordered elements

• To store key-value pairs

• To store unique elements

• To store elements in a sequence

Answer explanation

 Duplicate values are not allowed in a set

What does the pop() function do when used with a dictionary?

• Removes the last element

• Removes an element at a specific index

• Removes a key-value pair with a specific key

• Removes all elements

What is the purpose of an if statement in Python?

• To define a new variable

• To perform a loop

• To execute code conditionally

• To create a dictionary