** I Need help with the following questions on my F# Review with explanation ple
ID: 3881457 • Letter: #
Question
** I Need help with the following questions on my F# Review with explanation please! :) **
8) Let F# function foo be defined as follows: let rec foo = function | (xs, []) -> xs | (xs, y::ys) -> foo (xs@[y], ys) If foo is supposed to append its two list parameters, which of the following is true? Select one:
a) foo fails Step 1 of the Checklist for Programming with Recursion.
b) foo fails Step 2 of the Checklist for Programming with Recursion.
c) foo fails Step 3 of the Checklist for Programming with Recursion.
d) foo satisfies all three steps of the Checklist for Programming with Recursion.
9) Which of the following is the type that F# infers for (fun f -> f 17)? Select one:
a) ('a -> 'b) -> 'b
b) (int -> int) -> int
c) (int -> 'a) -> 'a
d) ('a -> 'a) -> 'a 10)
Which of the following has type int -> int list? Select one:
a) (@) [5]
b) [fun x -> x+1]
c) fun x -> 5::x
d) fun x -> x::[5]
Explanation / Answer
9) Which of the following is the type that F# infers for (fun f -> f 17)? Select one:
Option:C
Answer: (int -> 'a) -> 'a
Which of the following has type int -> int list? Select one:
Option:B
Answer:b) [fun x -> x+1]
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