QUIZ

Certification Test


Que No. 1 ) Which of the following is not a valid way to create and initialize an array in Ruby? A.) arr = [1, 2, 3] B.) arr = Array.new(3) { \|i\| i + 1 } C.) arr = [1..3] D.) arr = [] << 1 << 2 << 3
Que No. 2 ) What is the purpose of the module keyword in Ruby? A.) To create a class B.) To define a loop C.) To group related code into a namespace D.) To declare a variable
Que No. 3 ) Which of the following is not a valid way to catch exceptions in Ruby? A.) rescue Exception => e B.) catch (Exception ex) {} C.) rescue => e D.) rescue SomeException => e
Que No. 4 ) How do you define a lambda function in Ruby? A.) lambda { \|x\| x * 2 } B.) def lambda(x) { x * 2 } end C.) func(x) { x * 2 } D.) create lambda(x) { x * 2 }
Que No. 5 ) What does the nil value represent in Ruby? A.) An empty string B.) A missing or undefined value C.) The number zero D.) An error
Que No. 6 ) How do you define a block in Ruby? A.) block { \|x\| x * 2 } B.) def block(x) { x * 2 } end C.) { \|x\| x * 2 } D.) create block(x) { x * 2 }
Que No. 7 ) What is the purpose of the super keyword in Ruby? A.) To define a loop B.) To execute code based on a condition C.) To call a method in the superclass D.) To declare a variable
Que No. 8 ) Which of the following is not a valid way to iterate through a collection in Ruby? A.) for item in collection B.) collection.each do \|item\| C.) while condition D.) until condition
Que No. 9 ) What is the Ruby syntax for defining a class constructor? A.) constructor MyClass { } B.) MyClass.new { } C.) def MyClass.initialize D.) def initialize
Que No. 10 ) What is the purpose of the include keyword in Ruby? A.) To define a class B.) To create an instance of a class C.) To include a module's methods in a class D.) To declare a variable

Que No. 1 ) Which of the following is not a valid way to create and initialize an array in Ruby?

A.) arr = [1, 2, 3]
B.) arr = Array.new(3) { |i| i + 1 }
C.) arr = [1..3]
D.) arr = [] << 1 << 2 << 3

Que No. 2 ) What is the purpose of the module keyword in Ruby?

A.) To create a class
B.) To define a loop
C.) To group related code into a namespace
D.) To declare a variable

Que No. 3 ) Which of the following is not a valid way to catch exceptions in Ruby?

A.) rescue Exception => e
B.) catch (Exception ex) {}
C.) rescue => e
D.) rescue SomeException => e

Que No. 4 ) How do you define a lambda function in Ruby?

A.) lambda { |x| x * 2 }
B.) def lambda(x) { x * 2 } end
C.) func(x) { x * 2 }
D.) create lambda(x) { x * 2 }

Que No. 5 ) What does the nil value represent in Ruby?

A.) An empty string
B.) A missing or undefined value
C.) The number zero
D.) An error

Que No. 6 ) How do you define a block in Ruby?

A.) block { |x| x * 2 }
B.) def block(x) { x * 2 } end
C.) { |x| x * 2 }
D.) create block(x) { x * 2 }

Que No. 7 ) What is the purpose of the super keyword in Ruby?

A.) To define a loop
B.) To execute code based on a condition
C.) To call a method in the superclass
D.) To declare a variable

Que No. 8 ) Which of the following is not a valid way to iterate through a collection in Ruby?

A.) for item in collection
B.) collection.each do |item|
C.) while condition
D.) until condition

Que No. 9 ) What is the Ruby syntax for defining a class constructor?

A.) constructor MyClass { }
B.) MyClass.new { }
C.) def MyClass.initialize
D.) def initialize

Que No. 10 ) What is the purpose of the include keyword in Ruby?

A.) To define a class
B.) To create an instance of a class
C.) To include a module's methods in a class
D.) To declare a variable

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