505536
Question 1
Question
let x = 2 in let y = -2 in if x^2==y^2 then 1 else 2
Answer
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1
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2
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3
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4
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5
Question 2
Question
length (words ("One Two Three" ++ "Four"))
Answer
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1
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2
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3
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4
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5
Question 3
Question
23 `mod` 8 `mod` 5
Answer
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1
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2
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3
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4
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5
Question 4
Question
head (tail [3,4,5])
Answer
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3
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4
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5
Question 5
Question
let x = x+3 in fst (snd (x+1,(5,x-2)))
Answer
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2
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3
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4
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5
Question 6
Question
xs = [1,2,3,4,5]
take 3 xs
Answer
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reverse (tail (reverse (tail xs)))
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tail (tail (tail xs))
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reverse (tail (tail (reverse xs)))
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reverse (drop 2 (reverse xs))
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reverse (reverse (take 3 xs))
Question 7
Question
xs = [1,2,3,4,5]
take 3 xs
Answer
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reverse (tail (reverse (tail xs)))
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tail (tail (tail xs))
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reverse (tail (tail (reverse xs)))
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reverse (drop 2 (reverse xs))
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reverse (reverse (take 3 xs))
Question 8
Question
ys = [1,2,3,4]
last (init ys)
Answer
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fst (drop 2 ys)
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reverse (init ys)
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fst (drop 1 (reverse ys))
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head (drop 2 ys)
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snd (drop 2 (reverse ys))
Question 9
Question
xs = [1,2,3,4,5,6]
reverse (init xs)
Answer
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reverse (tail xs)
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tail (reverse xs)
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reverse (take 5 xs)
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reverse (drop 1 xs)
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drop 1 (reverse xs)
Question 10
Question
ys = [1,2,3,4,5]
init (init (init ys))
Answer
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take 2 ys
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take 3 ys
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drop 3 (reverse ys)
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reverse (drop 3 (reverse ys))
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reverse (tail (reverse (init ys)))
Question 11
Question
What is the standard prelude?
Answer
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Contains predefined classes, types and functions, implicitly imported into every Haskell program.
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Contains advanced I/O functions.
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