Best Ruby Test - 93+ 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. 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

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

5 + 3

4. What is the difference between '==', '===' and 'eql?' in Ruby?

'==' compares values, '===' compares values and types, 'eql?' is a synonym for '==='.

'==' compares values and types, '===' compares values, 'eql?' is not a valid method.

'==' compares values, '===' is not a valid method, 'eql?' compares values and types.

'==' is not a valid method, '===' compares values, 'eql?' compares values and types.

5. What is the Ruby convention for naming variables?

CamelCase

snake_case

kebab-case

PascalCase

6. In Ruby, what is the difference between 'puts' and 'print'?

'puts' adds a newline character after the output, 'print' does not.

'puts' is used for printing strings, 'print' is used for printing numbers.

'puts' is used for printing numbers, 'print' is used for printing strings.

There is no difference, 'puts' and 'print' are interchangeable.

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

pop

push

shift

unshift

9. 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

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

then

else

elseif

11. What is the purpose of the 'require' keyword in Ruby?

To load a file or library

To define a class

To create an object

To access class attributes

12. 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

13. What is the purpose of the 'each' method in Ruby?

To define a class

To iterate over elements in a collection

To perform string concatenation

To define a method

14. What is the output of the code 'puts true && false' in Ruby?

true

false

true && false

error

15. What is the purpose of the 'initialize' method in a Ruby class?

To create a new object

To define instance variables

To define a class

To print output

16. Which operator is used for the logical 'OR' operation in Ruby?

17. Who created the Ruby programming language?

Guido van Rossum

Larry Wall

Yukihiro Matsumoto

Linus Torvalds

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

19. Which Ruby operator is used to check if an object belongs to a specific class or module?

is_a?

instance_of?

typeof

class_of

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. In Ruby, what is an 'if' statement used for?

Defining a method

Looping through an array

Conditional execution of code

Creating a class

22. 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

23. What is the purpose of the 'include' module in Ruby?

To include a file

To include a class

To include a module's methods in a class

To define a method

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

to_upper

uppercase

upcase

convert_upper

25. What is Ruby?

A precious gemstone

A programming language

A popular movie

A type of currency

26. In Ruby, what is the 'send' method used for?

To send email messages

To invoke a method on an object

To define a class

To create a new object

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

28. 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

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

Array

Hash

String

Symbol

30. 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

31. In Ruby, what is the 'elsif' keyword used for in control structures?

To define a method

To create a loop

To specify an alternative condition

To print output

32. In Ruby, how do you define a constant?

Using the 'const' keyword

Using the '@' symbol

Using uppercase letters

Using the 'let' keyword

33. 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

34. 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

35. What is the purpose of the 'freeze' method in Ruby?

To define a class

To create a loop

To prevent further modifications to an object

To print output

36. In Ruby, how do you define a range from 1 to 10?

(1..10)

[1, 10]

{1-10}

<1, 10>

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

38. 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

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

A variable

A piece of code that can be passed to methods

A data structure

A class

40. Which method is used to check if a variable is of a certain class in Ruby?

is_a?

typeof

instanceof

classof

41. 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

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

var name = 'John'

$name = 'John'

@name = 'John'

#name = 'John'

43. What is the Ruby operator for equality?

===

44. Which method is used to iterate over each element of an array in Ruby?

for loop

each

iterate

loop

45.

46. What is the output of the code 'puts 2 * 3' in Ruby?

2 * 3

2 + 3

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

/* */

48. What does the 'include' module function do in Ruby?

It includes a file in the current directory

It imports methods and constants from a module into a class

It defines a new module

It raises an exception

49. Which of the following is not a valid variable naming convention in Ruby?

snake_case

CamelCase

UPPERCASE

camelCase

50.

Ruby MCQ Test 1