Free Ruby Association Ruby-Programmer-Gold Exam Questions

Consider the following Ruby code snippet that incorporates the use of refinements:module StringAdjustments refine String do def emphasize "#{self}!" end endend class Writer using StringAdjustments  def emphasize_statement(statement) statement.emphasize endend writer = Writer.newexternal_statement = "Hello".emphasize result1 = writer.emphasize_statement("Hello")result2 = external_statement What will be the values of result1 and result2, respectively?

In Ruby, the use of blocks is a fundamental concept for iterating over collections and executing code repeatedly. Examine the following Ruby code snippet:numbers = [1, 2, 3, 4, 5]sum = 0numbers.each { |number| sum += number }doubled = numbers.map { |number| number * 2 } Based on this code, which two of the following statements are true regarding the use and functionality of blocks?

Analyze the following Ruby code snippet in the context of class design and instance variable management:class Book  attr_reader :title, :author  @@total_books = 0  def self.total_books    @@total_books  end  def initialize(title, author)    @title = title    @author = author    @@total_books += 1  endendclass Library  attr_reader :books   def initialize    @books = []  end  def add_book(book)    @books

In Ruby, the understanding of operators and their precedence is crucial for writing correct and efficient code. Consider the following Ruby code snippet:a = 10b = 3result1 = a + b * 2result2 = (a + b) % 3result3 = a ** b / 2 Based on this code, which two of the following statements are true regarding the use of operators and their precedence?

Review the following Ruby code snippet:def execute_operations(operations) operations.each do |operation| result = send(operation) break result if result == :error endend def operation1 :successend def operation2 :errorend def operation3 :successend result = execute_operations([:operation1, :operation2, :operation3]) What will be the value of result after executing this code?