Module 09 (Day 2)

In Racket, which of the following is NOT one of the three kinds of things that we can give names to (use the (define ....)?

• Constants

• Functions

• Variables

• Function parameters

What can a function consume as an argument in Intermediate Student and above?

• A string

• A number

• Another function

• A list

What can a function produce as a result in Intermediate Student and above?

• Character

• Boolean

• Another function

• A string

Which of the following is an example of a user-defined function?

• (define plus +)

• (define (double x) (* x 2))

• (define lof (list + - * /))

• +

What is the purpose of using first-class functions in sorting (i.e. the auxiliary parameter less-than<?)?

• To abstract over comparison operations

• To increase the speed of sorting

• To reduce memory usage

• To simplify the syntax

What is the result of this code?

• (list -1 -2 3 5 -8)

• (list 3 -1 -2 5 -8)

• (list 1 2 3 5 8)

• (list -2 -1 3 5 -8)

What is the result?

• (list 3 5)

• (list 5 3)

• (list 5 3 0 -1 -2)

• (list 5 3 0 1 2)

What is the result?

• (list 5 7 4 6 8)

• (list 5 7 8 6 4)

• (list 7 5 8 6 4)

• (list 8 6 4 7 5)