Functional Programming 1

What is a programming paradigm?

• A pattern or model for how to program

• A type of procedure or function

• A suite of coding environments
• A programming language with immutable data structures

In which programming paradigm are programs constructed by applying and composing functions?

• Procedural

• Object Oriented

• Declarative

• Functional

Find the head of this list: myList = [2, 3, 67, 89, 4]

• 2

• 3, 67, 89, 4

• 2, 3, 67

• 67, 89, 4

Evaluate
myList = [2, 3, 67, 89, 4]
length myList

• 5
• 4
• 2
• 2, 3, 67, 89, 4

What are two key features of functional programming? (PICK 2)

• Executes line by line

• Immutability

• Lists

• Statelessness

• No ability to add comments

Which of these languages follows the functional paradigm most strongly?

• Python

• Haskell

• Java

• C++

Evaluate

fruits = ["Apple", "Honeydew", "Watermelon", "Kiwi", "Pear"]

tail (tail (fruits))

• ["Kiki", "Pear"]

• "Watermelon", "Kiwi", "Pear"

• "Honeydew", "Watermelon", "Kiwi", "Pear"

• ["Watermelon", "Kiwi", "Pear"]

Answer explanation

The tail function always returns a list (square brackets).

Evaluate

head [1, 2, 3, 4, 5]

• 1

• [2, 3, 4, 5]

• 5

• [1]

Evaluate

tail [1, 2, 3, 4, 5]

• 1

• [2, 3, 4, 5]

• 5

• 2, 3, 4, 5

Answer explanation

The tail function always returns a list (square brackets).

Find the head of this list:
myList = [2, 3, 67, 89, 4]

• 2

• 3, 67, 89, 4

• 2, 3, 67, 89

• [2]