Free Ruby Association Ruby-Programmer-Gold Exam Questions

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?

Consider the following Ruby code snippet involving the implementation and usage of the Comparable module:class TimeRange include Comparable  attr_reader :start_time, :end_time  def initialize(start_time, end_time) @start_time = start_time @end_time = end_time end  def (other) return nil unless other.is_a?(TimeRange) [start_time, end_time] [other.start_time, other.end_time] endend time_range1 = TimeRange.new(10, 20)time_range2 = TimeRange.new(15, 25)time_range3 = TimeRange.new(10, 20) result1 = time_range1 time_range3  What will be the values of result1, result2, and result3, respectively?

Consider the following Ruby code snippet involving the implementation and usage of the Comparable module:class TimeRange include Comparable  attr_reader :start_time, :end_time  def initialize(start_time, end_time) @start_time = start_time @end_time = end_time end  def (other) return nil unless other.is_a?(TimeRange) [start_time, end_time] [other.start_time, other.end_time] endend time_range1 = TimeRange.new(10, 20)time_range2 = TimeRange.new(15, 25)time_range3 = TimeRange.new(10, 20) result1 = time_range1 time_range3  What will be the values of result1, result2, and result3, respectively?

Review the following Ruby code snippet in the context of class inheritance and method access control:class Product  def initialize(name, price)    @name = name    @price = price  end  private  def price    @price  endendclass Electronic < Product  def discount_amount(discount_percentage)    price * discount_percentage / 100.0  end  def discounted_price(discount_percentage)    price - discount_amount(discount_percentage)  endendelectronic_item = Electronic.new("Laptop", 1000)result = electronic_item.discounted_price(20)What will be the value of result?

Examine the following Ruby code snippet that utilizes refinements:module LengthConversion refine String do def to_meters self.to_f / 3.281 end endend class MeasurementConverter using LengthConversion  def convert_to_meters(length_in_feet) length_in_feet.to_meters endend converter = MeasurementConverter.newoutside_conversion = "10".to_meters result1 = converter.convert_to_meters("10")result2 = outside_conversion What will be the values of result1 and result2, respectively?