Free Ruby Association Ruby-Programmer-Gold Exam Questions

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?

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?

In Ruby, which of the following literals correctly creates a Hash object with default values for undefined keys?

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 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?