1.How can you check if any element in an Enumerable is nil?

2.What is the output of the following code?

arr = [1, 2, 3, 4, 5]
result = arr.select { |x| x.odd? }
puts result.sum

3.What is the purpose of the `collect` method in Ruby Enumerables?

4.How do you reverse the order of elements in an Enumerable without modifying the original collection?

5.What does the `zip` method do in Ruby Enumerables?

6.How can you find the minimum and maximum values in an Enumerable?

7.What does the `slice` method do in Enumerables?

8.What is the output of the following code?

arr = [1, 2, 3, 4, 5]
result = arr.lazy.select { |x| x > 2 }.take(2).to_a
puts result.join(',')

9.Which method is used to check if no elements in an Enumerable satisfy a given condition?

10.What is the purpose of the `one?` method in Enumerables?

11.How do you select and return elements from an Enumerable based on their index positions?

12.What does the `take_while` method do in Ruby Enumerables?

13.Which method is used to concatenate two Enumerables in Ruby?

14.What is the purpose of the `chunk_while` method in Enumerables?

15.What will be printed by the following code?

arr = [1, 2, 3, 4, 5]
result = arr.chunk { |x| x.even? }.map { |even, values| even ? values : [] }
puts result.flatten.join(',')

16.Which method is used to check if all elements in an Enumerable are true for a given condition?

17.What does the `each_slice` method do in Enumerables?

18.How do you check if two Enumerables are equal in Ruby?

19.Which method is used to transform each element in an Enumerable and return a hash?

20.What does the `detect` method do in Ruby Enumerables?