1.How do you concatenate two Enumerables in Ruby?

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

3.What does the `group_by` method do in Ruby Enumerables?

4.How can you check if all elements in an Enumerable are positive numbers?

5.What will be printed by the following code?

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

6.What is the output of the following code?

arr = [1, 2, 3, 4, 5]
result = arr.each_with_object([]) { |x, obj| obj << x * 3 }
puts result.join(',')

7.How can you convert an Enumerable of key-value pairs into a hash in Ruby?

8.How can you find the last n elements in an Enumerable?

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

10.What will be printed by the following code?

arr = [1, 2, 3, 4, 5]
result = arr.slice_when { |x, y| x + 1 != y }
puts result.to_a.join(',')

11.How do you remove nil values from an Enumerable?

12.How do you check if an element is present in an Enumerable using a custom condition?

13.What is the output of the following code?

arr = [1, 2, 3, 4, 5]
result = arr.inject(1) { |product, x| product * x }
puts result

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

15.What is the output of the following code?

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

16.What does the `each_with_index` method do?

17.How can you filter elements in an Enumerable based on a regular expression?

18.Which Enumerable method is used to find the average value of elements in a collection?

19.What does the `flat_map` method do in Ruby Enumerables?

20.What is the purpose of the `each_with_object` method in Enumerables?