Advanced Topics In Ruby — Part 2 MCQs with Explanations

The inability of an object to be modified after it is created is the correct answer to “What does the term "immutability" refer to in Ruby”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

It appends a string to the end of another string is the correct answer to “What is the purpose of the String#<< method in Ruby”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

It indicates that the method mutates the receiver object is the correct answer to “What does the "bang" (!) operator do when appended to a method name in Ruby”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

They provide a way to break out of nested loops or blocks is the correct answer to “What is the purpose of the catch and throw keywords in Ruby”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

to_json is the correct answer to “Which method in Ruby is used to convert an object to a JSON string”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

A method that returns a boolean value indicating a condition is the correct answer to “What is a "predicate method" in Ruby”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

It allows you to dynamically invoke a method on an object is the correct answer to “In Ruby, what is the purpose of the __send__ method”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

It automatically loads a specified file when a constant is accessed for the first time is the correct answer to “What does the autoload method in Ruby do”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

Caching the return value of a method for future invocations is the correct answer to “What is a "memoization" technique in Ruby”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

define_method is the correct answer to “Which method is commonly used to dynamically define instance methods in Ruby”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

It returns a Method object representing the specified method is the correct answer to “In Ruby, what is the purpose of the #method method”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

It invokes a public method on an object, bypassing visibility restrictions is the correct answer to “What is the purpose of the public_send method in Ruby”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

Singleton is the correct answer to “Which Ruby module is commonly used to implement the Singleton design pattern”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

Domain-Specific Language is the correct answer to “What does the term "DSL" stand for in Ruby programming”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

A method that is called in response to a specific event in the application lifecycle is the correct answer to “What is a "callback" in the context of Ruby on Rails”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

It is used to define anonymous functions is the correct answer to “What does the "stabby lambda" (->) syntax in Ruby represent”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

It makes the specified methods accessible both as instance methods and module methods is the correct answer to “In Ruby, what is the purpose of the module_function keyword”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

module_function makes the specified methods accessible as module methods, while extend self makes them accessible as instance methods is the correct answer to “What is the primary difference between module_function and extend self in Ruby”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

It invokes a method dynamically on an object is the correct answer to “What does the send method in Ruby do”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

Forwardable is the correct answer to “Which Ruby module is commonly used for method delegation”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

It is called when a constant is accessed that is not defined is the correct answer to “What is the purpose of the const_missing method in Ruby”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

A special comment that affects the behavior of the Ruby interpreter is the correct answer to “What is a "magic comment" in Ruby”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

It includes a module in the inheritance chain before the class itself is the correct answer to “In Ruby, what is the purpose of the Module#prepend method”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

It allows a method to accept a variable number of arguments as an array is the correct answer to “What does the "splat" operator (*) do when used in method definitions in Ruby”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

A variable that is shared among all instances of a class is the correct answer to “What is a "class variable" in Ruby”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

They define getter, setter, and both getter and setter methods for instance variables respectively is the correct answer to “What is the purpose of the Module#attr_reader, Module#attr_writer, and Module#attr_accessor methods in Ruby”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

It is called when a method is called on an object that does not respond to the method is the correct answer to “What is the purpose of the method_missing method in Ruby's BasicObject class”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

Creating an alternate name for an existing method or variable is the correct answer to “What does the term "aliasing" refer to in Ruby”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.

It automatically loads a specified file when a constant is accessed for the first time is the correct answer to “What is the purpose of the Kernel#autoload method in Ruby”. This question is standard in competitive examination syllabi for Advanced Topics In Ruby.