Best Ruby Test - 83+ MCQs: Ruby test: Evaluate Your Programming Skills with Ruby Questions and Answers

1. What is the purpose of the 'throw' and 'catch' keywords in Ruby?

To create a new class

To handle exceptions and errors

To define a loop

To define a module

2. Which operator is used to concatenate two strings in Ruby?

concat

merge

3. Which of the following is NOT a valid way to define a variable in Ruby?

variable_name = value

@variable_name = value

$variable_name = value

variable name = value

4. Which method is used to remove the last element from an array in Ruby?

pop

push

shift

unshift

5. In Ruby, what does 'attr_accessor' do?

It defines a class method

It creates getter and setter methods for class variables

It defines a class constant

It defines an instance method

6. In Ruby, what is the purpose of the 'next' keyword within a loop?

To exit the loop

To skip the current iteration and continue to the next

To restart the loop

To print output

7. What is the Ruby convention for naming classes?

CamelCase

snake_case

kebab-case

PascalCase

8. What is the purpose of the 'case' statement in Ruby?

To define a class

To define a method

To create a new object

To perform conditional branching

9. Which Ruby operator is used to check if two values are equal in both value and data type?

===

10. In Ruby, what symbol is used to define a comment that spans multiple lines?

/* */

11. What is Ruby primarily known for?

Web development

Data analysis

Artificial intelligence

Game development

12. What is the symbol used to represent the current object in Ruby?

13. What is the purpose of the 'begin' and 'rescue' keywords in Ruby?

To define a new class

To handle exceptions and errors

To create an array

To define a loop

14. What is the purpose of the 'attr_accessor' keyword in Ruby?

To define a class

To access class attributes

To create a new object

To define a method

15. What is the purpose of the 'unless' keyword in Ruby?

To define a new class

To create a new object

To execute code when a condition is false

To raise an exception

16. Which of the following is a valid way to define a variable in Ruby?

var name = 'John'

$name = 'John'

@name = 'John'

#name = 'John'

17. What does the 'nil' value represent in Ruby?

A positive integer

A negative integer

A floating-point number

A lack of value or absence of data

18. What does the 'attr_reader' method do in Ruby?

It defines a class

It creates a new object

It generates a getter method for an instance variable

It defines a loop

19. What is the Ruby operator for exponentiation?

20. What is the primary use of the 'puts' method in Ruby?

To define a class

To print output to the console with a newline character

To perform mathematical operations

To loop through an array

21. What is the purpose of the 'map' method in Ruby?

To define a class

To create a loop

To transform each element of an array and return a new array

To print output

22. What is the purpose of the 'retry' keyword in Ruby?

To define a loop

To create a new object

To raise an exception

To restart a block of code from the beginning

23. What does the 'super' keyword do in Ruby?

It defines a superclass for a class

It calls the superclass's implementation of the current method

It creates an instance of a class

It raises an exception

24. What is the Ruby convention for naming variables?

CamelCase

snake_case

kebab-case

PascalCase

25. What is the symbol used to define a class variable in Ruby?

26. What is the purpose of the 'tap' method in Ruby?

To define a new class

To create a new object

To modify an object and return it

To raise an exception

27. What is the purpose of Ruby's 'yield' keyword?

To define a block of code to be executed later

To create a new object

To define a class method

To declare a variable

28. In Ruby, what is the purpose of the 'require' keyword?

To define a method

To include external libraries or modules

To create a class

To loop through an array

29. Which operator is used for concatenating strings in Ruby?

30. In Ruby, what is a 'block'?

A variable

A piece of code that can be passed to methods

A data structure

A class

31. In Ruby, what is a lambda?

A built-in data type

A block of code that can be assigned to a variable

A special method for defining classes

A way to create strings

32. Which Ruby data structure is similar to an array but allows you to associate values with keys?

Array

Hash

String

Symbol

33. What is the result of 5 + 3 in Ruby?

5 + 3

34. What is the purpose of the '__FILE__' constant in Ruby?

To define a new file

To get the current file's name

To access a global variable

To create a new object

35. Which Ruby data structure is similar to an array but can contain only unique values?

List

Hash

Set

Tuple

36. In Ruby, what does 'self.included(base)' method indicate in a module?

It defines a new module

It raises an exception

It is a placeholder method with no specific purpose

It is called when the module is included in another module or class

37. Which keyword is used to define a conditional statement in Ruby?

then

else

elseif

38. In Ruby, what is the purpose of the 'super' keyword in a subclass?

To call the parent class's constructor

To create a new object

To define a method

To access a global variable

39. What is a Ruby symbol?

A string with special formatting

A unique identifier represented by a name preceded by a colon

A reserved keyword in Ruby

A variable that cannot be reassigned

40. Which method is used to convert a string to uppercase in Ruby?

to_upper

uppercase

upcase

convert_upper

Ruby MCQ Test 2