21. What is the correct way to concatenate two strings in Ruby? A. str1.concat(str2) B. str1 + str2 C. str1.append(str2) D. str1.combine(str2) Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
22. Which method is used to convert a string to uppercase in Ruby? A. .upcase B. .uppercase C. .to_upper D. .to_uppercase Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
23. What is the output of the expression: "5".to_i + 2 in Ruby? A. 7 B. "52" C. 7 D. Error Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
24. What is the correct way to declare a variable in Ruby without assigning a value? A. var_name B. var_name = nil C. var_name = "" D. var_name = nil Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
25. What is the method used to convert a string to lowercase in Ruby? A. .downcase B. .to_lower C. .lower D. .to_lowercase Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
26. Which of the following is the correct way to declare a variable in Ruby with a default value? A. var_name = value B. var_name := value C. var_name << value D. var_name => value Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
27. What is the method used to check if a variable is numeric in Ruby? A. .numeric? B. .is_numeric? C. .number? D. .numeric_value? Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
28. What is the output of the expression: "10" * 3 in Ruby? A. "101010" B. 30 C. 1010 D. Error Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
29. Which method is used to convert a string to an array of characters in Ruby? A. .to_chars B. .split C. .to_array D. .chars Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
30. What is the method used to check if a variable is of a specific class in Ruby? A. .is_a? B. .type_of C. .typeof D. .class_of Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board