What is the difference between #== and #eql??
Ruby support single inheritance/multiple inheritance or both?
Do you know when self.up and self.down method is used?
Explain the garbage collection feature of ruby?
Explain about Class variable and global variable?
What are the three levels of method access control for classes and what do they signify? What do they imply about the method?
Tell me what is the difference between calling super() and super call?
What are the looping structures available in ruby?
What are the object-oriented programming features supported by ruby?
What are the data types in ruby?
What is concatenating string in Ruby?
What is the difference between a statement and an expression in ruby?
What is the difference between nil and false in ruby?
What is the difference between extend and include?
Explain retry statement in ruby.