Thách thức mọi câu hỏi phỏng vấn Ruby dành cho lập trình viên

How does block invocation differ from method invocation?

Why can you safely use a string as a hash key, even though a string is mutable?

Explain redo vs. retry usage

Explain this ruby idiom: a ||= b

Why might you want to avoid using string literals within loops?

When might you use the do / end syntax versus using the curly bracket syntax for a block?

Why might you want to alias a method?

What are two uses of ranges?

What is the difference between calling "super" and calling "super()"

What will val1 and val2 equal after the code below is executed? Explain your answer.

What is the difference between Array#map and Array#each ?

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

Which operator must be defined in order to implement the Comparable module?

What are some disadvantages of a case statement versus repeated elsif
statements?

Describe a closure in Ruby

What is the difference between throw/catch and raise/rescue ?

Can you tell me the three levels of method access control for classes and modules? What do they imply
about the method?

What is the difference between Kernel#require and Kernel#load ?

What is the main difference between procs and lambdas?

What is a Proc?

How is the invocation of a private method different than the invocation of a public method from within its
defining class?

What is the difference between Module#remove_method and Module#undef_method ?

What is the difference between #== and #eql? ?

What does a bang ! at the end of a method signify?

What does self mean?

What is the difference between Proc invocation and lambda invocation?

What will be the value of ...