Ruby Interview Questions For Freshers

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

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What is the difference between 'puts' and 'print' in Ruby?

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What is the purpose of 'attr_accessor' in Ruby?

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What is the 'nil' value in Ruby? How does Ruby handle it?

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What is the purpose of the 'end' keyword in Ruby?

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

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How can you iterate over an array in Ruby?

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What are some common string manipulation techniques in Ruby?

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Explain the concept of 'concatenation' in Ruby.

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How can you find the length of an array in Ruby?

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What is the purpose of the 'include' keyword in Ruby?

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How can you convert a string to lowercase in Ruby?

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What is the purpose of the 'times' method in Ruby?

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What are the key features of Ruby?

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What is Ruby?

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Ruby Intermediate Interview Questions

How can you handle exceptions in Ruby?

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Explain the concept of 'duck typing' in Ruby.

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Duck typing is a concept in Ruby where the suitability of an object for a particular method or operation is determined by the presence of certain methods or attributes, rather than by its specific class or type. If an object "quacks like a duck" (i.e., has the necessary methods), it is considered to be of the required type. This allows for flexibility and dynamic behavior in Ruby programming.

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Explain the concept of 'method chaining' in Ruby.

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How can you read input from the command line in Ruby?

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Explain the concept of 'scope' in Ruby.

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What are some common data structures in Ruby?

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What are access control modifiers in Ruby?

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Explain the concept of 'method overriding' in Ruby.

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Method overriding is a concept in Ruby where a subclass defines a method with the same name as its superclass. When the method is called on an instance of the subclass, the subclass's method is executed instead of the superclass's method. This allows the subclass to provide its own implementation of the method, overriding the behavior inherited from the superclass.

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What are some ways to handle file I/O in Ruby?

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What is the purpose of the 'protected' keyword in Ruby?

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

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Explain the concept of 'namespacing' in Ruby.

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Explain the concept of 'modules' in Ruby.

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What is the purpose of the 'next' keyword in Ruby?

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How can you remove duplicates from an array in Ruby?

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Explain the differences between Ruby and other programming languages like Python and Java.

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What are some popular frameworks in Ruby?

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Explain what RubyGems are and how they are used.

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How does Ruby implement object-oriented programming concepts?

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What is a block in Ruby? How is it different from a method?

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Explain the difference between a symbol and a string in Ruby.

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What is the purpose of the 'yield' keyword in Ruby?

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What is a module in Ruby? Why would you use one?

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Explain the concept of 'self' in Ruby.

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What is a lambda in Ruby? How is it different from a Proc?

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What is the 'splats' operator in Ruby? How is it used?

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What is the purpose of a 'gemfile.lock' file in Ruby projects?

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How can you achieve inheritance in Ruby?

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In Ruby, you can achieve inheritance by using the "<" symbol in the class definition. By declaring a class to inherit from another class, the child class inherits all the attributes and methods of the parent class, establishing an "is-a" relationship between the two.

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Ruby Interview Questions For Experienced

What are Ruby refinements? How are they used?

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What is metaprogramming in Ruby?

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Explain the concept of monkey patching in Ruby.

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What is the purpose of the 'super' keyword in Ruby?

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How does Ruby handle concurrency and multithreading?

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What is the concept of 'method_missing' in Ruby?

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Explain the concept of 'singleton classes' in Ruby.

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A singleton class, also known as an eigenclass or metaclass, is a unique class that can have only one instance. It is automatically created for every object in Ruby and is used to define methods and attributes specifically for that object. It is different from a regular class as it exists solely to extend the behavior of that object and cannot be instantiated directly.

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What are some common performance optimization techniques in Ruby?

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What is the purpose of the '__FILE__' and '__LINE__' keywords in Ruby?

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What is the 'Kernel' module in Ruby? How is it used?

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What are some common security vulnerabilities in Ruby applications?

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Explain the concept of 'garbage collection' in Ruby.

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