Functional Programming

Question 1

What is a declarative programming language?

Answer 1

A language where the logic of a program is defined, rather than the control flow of computation

Question 2

What is a procedural programming language?

Answer 2

A language where the control flow is defined rather than the logic

Question 3

What is a first-class object?

Answer 3

Any object that can be passed as an argument to a function

Question 4

What is a high-order function?

Answer 4

A function that takes another function as an argument, or a function that returns another function

Question 5

What does the map function do?

Answer 5

It takes a list of elements and applies a function to each item in the list

Question 6

What does the filter function do?

Answer 6

It returns a list of elements with specified values from another list

Question 7

What does the reduce function do?

Answer 7

It recursively adds each successive element of a list, allowing for the entire lost to be represented as a single number

Question 8

What is the head of a list?

Answer 8

The first element of a list

Question 9

Give three advantages of functional programming paradigms

Answer 9

×Functions are very abstract, so are less prone to errors
×Functions are easier to test because a function will always give the same output
×It is easier to reuse functions with any level of data abstraction