Question 1

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 2

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?

Options :

A : NoMethodError, NoMethodError

B : Approximately 3.048, Approximately 3.048

C : Approximately 3.048, NoMethodError

D : NoMethodError, Approximately 3.048

Answer: C

Question 3

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

Question 4

In Ruby, understanding non-local exits such as break, next, and return within the context of blocks and methods is crucial for controlling the flow of a program. Consider the following Ruby code snippet:def test_method [1, 2, 3].each do |i| return i if i == 2 end "No match"end result = test_method Based on this code, which two of the following statements are true regarding non-local exits in Ruby?

Options :

A : The return keyword in the block causes an exit from the each loop and returns 2 from the test_method.

B : The return keyword in the block causes the entire program to exit, assigning nil to result.

C : The result variable will be assigned the string "No match" because the each loop completes its iteration.

D : If i equals 2, the each loop is exited and the test_method returns "No match".

E : The return keyword inside the block exits the block and continues execution with the next line after the each loop.

Answer: A,E

Question 5

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

Options :

A : hash = { default: [] }

B : hash = Hash.new { |h, k| h[k] = [] }

C : hash = Hash[:default, 0]

D : hash = {}.default(0)

Answer: B

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