What is the correct way to concatenate two strings in Ruby?
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Which method is used to convert a string to uppercase in Ruby?
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What is the output of the expression: "5".to_i + 2 in Ruby?
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What is the correct way to declare a variable in Ruby without assigning a value?
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What is the method used to convert a string to lowercase in Ruby?
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Which of the following is the correct way to declare a variable in Ruby with a default value?
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What is the method used to check if a variable is numeric in Ruby?
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What is the output of the expression: "10" * 3 in Ruby?
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Which method is used to convert a string to an array of characters in Ruby?
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What is the method used to check if a variable is of a specific class in Ruby?
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Which of the following is the correct way to define a variable in Ruby?
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What is the method used to check if a string contains a specific substring in Ruby?
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What is the result of the expression: 10 % 3 in Ruby?
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In Ruby, what is the keyword used to define a constant?
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Which of the following is the correct way to define a range in Ruby?
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What does the 'return' keyword do in Ruby methods?
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What is the correct way to declare and initialize an array in Ruby?
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In Ruby, what is the default file extension for Ruby files?
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What does the 'chomp' method do in Ruby?
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What is the correct syntax for a multiline comment in Ruby?
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