Question 1

Evaluate the following Ruby code snippet that involves the forwardable and date modules:

require 'forwardable'require 'date' class Project extend Forwardable def_delegators :@deadline, :month, :day attr_accessor :name attr_reader :deadline def initialize(name, deadline) @name = name @deadline = Date.parse(deadline) endend project = Project.new("Ruby Exam Prep", "2024-06-30")result1 = project.monthresult2 = project.dayproject.deadline = Date.parse("2024-07-15")result3 = project.month What will be the values of result1, result2, and result3, respectively?

Options :

A : 6, 30, 7

B : June, 30, 7

C : June, 30, July

D : 6, 30, 6

Answer: A

Question 2

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?

Options :

A : result2 calculates the remainder of a + b divided by 3 due to the % operator.

B : result2 equals 1 because parentheses change the order of operations, prioritizing addition over modulo.

C : result1 equals 16 because addition (+) has a higher precedence than multiplication (*).

D : result3 results in 50 because division (/) has a higher precedence than exponentiation (**).

E : In result1, the multiplication (*) is performed before addition (+) due to operator precedence.

Answer: A,E

Question 3

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?

Options :

A : [:success, :error, :success]

B : :error

C : nil

D : :success

Answer: B

Question 4

In Ruby, effectively using blocks is essential for controlling flow and data processing. Review the following Ruby code snippet:

numbers = [1, 2, 3, 4, 5]sum = 0numbers.each { |number| sum += number }squared_numbers = numbers.map { |number| number ** 2 } Based on this code, which two of the following statements are correct about the blocks used in the context of the each and map methods?

Options :

A : The each block creates a new array containing each number squared.

B : The map block returns a new array with the square of each number, while the original numbers array remains unchanged.

C : Both each and map blocks modify the original numbers array.

D : The each block iteratively adds each number in the numbers array to sum, resulting in the sum of all numbers.

E : The map block modifies the original numbers array to contain the square of each number.

Answer: B,D

Question 5

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?

Options :

A : NoMethodError, "Hello!"

B : NoMethodError, NoMethodError

C : "Hello!", NoMethodError

D : "Hello!", "Hello!"

Answer: C