Question 1

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 2

Examine the following Ruby code snippet:

a = 2

b = 3

c = '4'

result1 = a * b

result2 = a * c

result3 = c * b

result4 = c + a

Options :

A : 6, TypeError, '444', TypeError

B : 6, '24', '444', TypeError

C : 6, '6', '444', TypeError

D : 6, TypeError, TypeError, TypeError

Answer: B

Question 3

Review the following Ruby code snippet:

def divide_numbers(x, y) x / yrescue ZeroDivisionError => e puts "Error: #{e.message}"end result1 = divide_numbers(10, 2)result2 = divide_numbers(10, 0)result3 = begin divide_numbers(10, '5') rescue TypeError => e "Caught: #{e.class}" endresult4 = divide_numbers(10, nil) rescue "Invalid operation" What will be the values of result1, result2, result3, and result4, respectively?

Options :

A : 5, nil, Caught: TypeError, Invalid operation

B : 5, Error: divided by 0, TypeError, TypeError

C : 5, ZeroDivisionError, Caught: TypeError, Invalid operation

D : 5, Error: divided by 0, Caught: TypeError, Invalid operation

Answer: D

Question 4

Analyze the following Ruby code snippet that utilizes regular expressions for string processing:

class EmailExtractor EMAIL_REGEX = /(\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Z|a-z]{2,}\b)/ def self.extract_from(text) text.scan(EMAIL_REGEX).flatten endend text1 = "Contact us at [email protected] for assistance"text2 = "Send your feedback to: [email protected] and [email protected]"text3 = "No emails here!" result1 = EmailExtractor.extract_from(text1)result2 = EmailExtractor.extract_from(text2)result3 = EmailExtractor.extract_from(text3) What will be the values of result1, result2, and result3, respectively?

Options :

A : ["[email protected]"], ["[email protected]", "[email protected]"], []

B : ["[email protected]"], ["[email protected]"], ["[email protected]"], []

C : ["[email protected]"], nil, []

D : ["[email protected]"], ["[email protected]", "[email protected]"], nil

Answer: A

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

Confidently Practice Online with Free Ruby-Programmer-Gold Exam Cram

Buying Options: