Given the array definition below, which of the following statements does NOT return 'b':

arr = ['a', 'b', 'c', 'd', 'e']

Given the array definition below, which of the following statements raises an exception:

arr = ['a', 'b', 'c', 'd', 'e']

What is the output from the following:

arr = ['a', 'b', 'c', 'd', 'e']
arr.map(&:upcase).reject!{|i| i=='B' }
puts arr

Which of the following techniques CANNOT be used to create an array composed of four "a" characters, i.e.

[ "a", "a", "a", "a"]

What is the expected output from the following code:

arr = ['a', 'b', 'c', 'd', 'e']
puts ['a', 'e', 'f'] | ['b'] & arr

What is the output after the following sequence of array operations:

foo  = ['a', 'b', 'c']
foo << "x"
foo.shift
foo.append(['d', 'e', 'f'])
foo.unshift("y")
foo.pop
puts foo

What is the output from the following:

names = [ "Aodhan", "Domhnall", "Caoimhe", "Blaithin"]
scores = [ 68, 23, 88, 71 ]
puts names.zip(scores).sort_by{|el| el[1] }.last[0]