Ruby Interview | Ruby on Rails
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The Ruby Interview channel is a resource for preparing for Ruby developer interviews. It features questions, problem-solving solutions, and interview tips.
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What will be printed when the following code is executed? ☝️
x = [1, 2, 3]
y = x.map { |n| n * 2 }
x[0] = 10
puts "#{x} #{y}"array = [1, 2, 3, 4]
array.each do |num|
next if num.even?
print num
endx = 5
y = 10
x, y = y, x
puts "#{x} #{y}"What does before_action :authenticate_user! do in a Rails controller?
How do you retrieve all users whose name starts with "A" using ActiveRecord?
How do you generate a new Rails model named Article?
Which of the following commands will delete a table permanently?
What SQL query retrieves the second-highest salary from the employees table?
Which SQL query selects unique values from a column?
Which of the following statements is true when using the UNION operator in SQL?
