Ruby Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Ruby Interview Questions

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How ruby looks up a method to invoke?

What is mvc and why do we use it?

Explain the difference in scope for these two variables: @@name and @name?

How do you remove nil values in array using ruby?

Explain each of the following operators and how and when they should be used: ==, ===, eql?, Equal?

What are blocks and procs?

What is the difference between ruby 1.9 and ruby 2.0?

Explain the types of variables available in ruby class?

Explain the difference between a single quote and double quote?

Can you call a private method outside a ruby class using its object?

Explain the role of thread pooling in relation to the thread lifecycle in ruby?

How symbol is different from variables?

What is the difference between extend and include?

Explain about the defined operator in ruby?

How would you freeze an object in ruby? Can you provide a simple example?

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Un-Answered Questions { Ruby }

what is the role of sub-directory app/controllers and app/helpers?

Why Ruby is known as a language of flexibility?

Explain the difference between a single quote and double quote?

Do you know how ruby looks up a method to invoke?

What is the difference between “#==” and “#equal?”

what is the purpose of the rakefile available in the demo directory in ruby?

Tell me what is the command to create a migration?

What is request.xhr?

What are blocks and procs?

How to read a file in Ruby?

In Ruby code, often it is observed that coder uses a short hand form of using an expression like array.map(&:method_name) instead of array.map { |element| element.method_name }. How this trick actually works?

Explain ruby class.

Explain the concepts and capabilities of garbage collection feature of Ruby?

What is ruby object?

Explain about ruby code blocks?

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