Kill Your Tech Interview
Top 84 Ruby Interview Questions
Entry Junior Mid Senior Expert
Theoretical Questions
Q1:
What are rubygems?
Entry
Q2:
Why Ruby is known as a language of flexibility?
Entry
Q3:
Which core object includes the "Kernel" module?
Entry
Q4:
What is an object?
Entry
Q5:
Is there an equivalent of “continue” in Ruby?
Entry
Q6:
What can you say about an identifier that begins with a capital letter?
Entry
Q7:
Is everything in Ruby an object?
Entry
Q8:
What is a class?
Entry
Q9:
What is the highest level in the object model?
Entry
Q10:
How might you specify a default value for a hash?
Junior
Q11:
Is Ruby a strongly typed or a weakly typed language?
Junior
Q12:
Explain redo statement in Ruby
Junior
Q13:
What is the difference between private and protected methods?
Junior
Q14:
Why might you use #each instead of for/in?
#each instead of for/in? Junior
Q15:
What is a predicate in the context of Ruby method naming conventions?
Junior
Q16:
Explain each of the following operators and how and when they should be used
Junior
Q17:
What is the difference between a class variable and a class instance variable?
Junior
Q18:
What is a module? Can you tell me the difference between classes and modules?
Junior
Q19:
What is the difference between an Instance Variable and a Class Variable?
Junior
Q20:
What is duck typing and how does it pertain to Ruby?
Junior
Q21:
Why are symbols typically used as hash keys instead of strings?
Junior
Q22:
What does it mean to coerce an object? Why would you do it?
Junior
Q23:
Explain some differences between Ruby and Python
Junior
Q24:
What is the difference between nil and false in Ruby?
Junior
Q25:
Are instance methods public or private?
Junior
Q26:
What is the difference between #== and #===?
#== and #===? Junior
Q27:
Which of the expressions listed below will result in "false"?
Junior
Q28:
Are class variables inherited?
Junior
Q29:
Is Ruby a statically typed or a dynamically typed language?
Junior
Q30:
Can you call a private method outside a Ruby class using its object?
Junior
Q31:
What is a DSL and how does it pertain to Ruby?
Junior
Q32:
What are two uses of the splat operator?
Junior
Q33:
There are three ways to invoke a method in ruby. Can you give me at least two?
Junior
Q34:
Why might you use Hash#fetch over Hash#[] when querying values in a hash?
Hash#fetch over Hash#[] when querying values in a hash? Junior
Q35:
What is the return value for ...
Junior
Q36:
Explain redo vs. retry usage
Mid Q37:
What will val1 and val2 equal after the code below is executed? Explain your answer.
Mid Q38:
What does a bang ! at the end of a method signify?
! at the end of a method signify? Mid Q39:
What does self mean?
self mean? Mid Q40:
What is the difference between #== and #equal??
#== and #equal?? Mid Q41:
Can you tell me the three levels of method access control for classes and modules? What do they imply about the method?
Mid Q42:
Why might you want to alias a method?
Mid Q43:
What is the difference between Proc invocation and lambda invocation?
Mid Q44:
What will be the value of ...
Mid Q45:
Which operator must be defined in order to implement the Comparable module?
Comparable module? Mid Q46:
Why might you want to avoid using string literals within loops?
Mid Q47:
Explain this ruby idiom: a ||= b
Mid Q48:
What is the main difference between procs and lambdas?
Mid Q49:
What is a Proc?
Mid Q50:
What is the difference between throw/catch and raise/rescue?
throw/catch and raise/rescue? Mid Q51:
When might you use the do/end syntax versus using the curly bracket syntax for a block?
do/end syntax versus using the curly bracket syntax for a block? Mid Q52:
How does block invocation differ from method invocation?
Mid Q53:
What is the difference between Module#remove_method and Module#undef_method?
Module#remove_method and Module#undef_method? Mid Q54:
What is the difference between calling "super" and calling "super()"
Mid Q55:
Describe a closure in Ruby
Mid Q56:
How is the invocation of a private method different than the invocation of a public method from within its defining class?
Mid Q57:
Why can you safely use a string as a hash key, even though a string is mutable?
Mid Q58:
What is the difference between Kernel#require and Kernel#load?
Kernel#require and Kernel#load? Mid Q59:
What is the difference between Array#map and Array#each?
Array#map and Array#each? Mid Q60:
What is an iterator?
Mid Q61:
What are some disadvantages of a case statement versus repeated elsif statements?
elsif statements? Mid Q62:
What are two uses of ranges?
Mid Q63:
What is the difference between #== and #eql??
#== and #eql?? Mid Q64:
What will be the result of each of the following lines of code
Senior Q65:
What happens if a block is passed two arguments but only accepts one argument?
Senior Q66:
Why doesn't Ruby support method overloading?
Senior Q67:
What happens to a constant which is not assigned?
Senior Q68:
Is a method an object?
Senior Q69:
What is an eigenclass?
Senior Q70:
What is the difference between Object#dup and #clone?
Object#dup and #clone? Senior Q71:
What is the difference between BasicObject#instance_eval and BasicObject#instance_exec?
BasicObject#instance_eval and BasicObject#instance_exec? Senior Q72:
Is a block an object?
Senior Q73:
When might you encounter a LocalJumpError?
LocalJumpError? Senior Q74:
What is the primary difference in these two code snippets?
Senior Q75:
How exactly does it work?
Senior Q76:
What is the differnece between extend and include in ruby?
extend and include in ruby? Expert Code Challenges
Q1:
How do you remove nil values in array using ruby?
nil values in array using ruby?
Junior Q2:
What will be the values of ...
Junior Q3:
Check if a value exists in an array in Ruby
Junior Q4:
Write a function that sorts the keys in a hash by the length of the key as a string.
Junior Q5:
What is the value of the variable "upcased" in the below piece of code?
Mid Q6:
Explain the difference between
Mid Q7:
Is the line of code below valid Ruby code? If so, what does it do?
Senior Q8:
Write a single line of Ruby code that prints the Fibonacci sequence of any length as an array.
Senior Rust has been Stack Overflow’s most loved language for four years in a row and emerged as a compelling language choice for both backend and system developers, offering a unique combination of memory safety, performance, concurrency without Data races...
Clean Architecture provides a clear and modular structure for building software systems, separating business rules from implementation details. It promotes maintainability by allowing for easier updates and changes to specific components without affe...
Azure Service Bus is a crucial component for Azure cloud developers as it provides reliable and scalable messaging capabilities. It enables decoupled communication between different components of a distributed system, promoting flexibility and resili...
Cosmos DB has gained popularity among developers and organizations across various industries, including finance, e-commerce, gaming, IoT, and more. Follow along and learn the 24 most common and advanced Azure Cosmos DB interview questions and answers...
More than any other NoSQL database, and dramatically more than any relational database, MongoDB's document-oriented data model makes it exceptionally easy to add or change fields, among other things. It unlocks Iteration on the project. Iteration f...
Unit Tests and Test Driven Development (TDD) help you really understand the design of the code you are working on. Instead of writing code to do something, you are starting by outlining all the conditions you are subjecting the code to and what outpu...
Domain-Driven Design is nothing magical but it is crucial to understand the importance of Ubiquitous Language, Domain Modeling, Context Mapping, extracting the Bounded Contexts correctly, designing efficient Aggregates and etc. before your next DDD p...
At its core, Microsoft Azure is a public cloud computing platform - with solutions including Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS) that can be used for services such as analytics, virtual c...
As an asynchronous event-driven JavaScript runtime, Node.js is designed to build scalable network applications. Follow along to refresh your knowledge and explore the 52 most frequently asked and advanced Node JS Interview Questions and Answers every...
Dependency Injection is most useful when you're aiming for code reuse, versatility and robustness to changes in your problem domain. DI is also useful for decoupling your system. DI also allows easier unit testing without having to hit a database and...
FullStack.Cafe is a biggest hand-picked collection of top Full-Stack, Coding, Data Structures & System Design Interview Questions to land 6-figure job offer in no time.
Coded with 🧡 using React in Australia 🇦🇺
by @aershov24, Full Stack Cafe Pty Ltd 🤙, 2018-2023
Privacy • Terms of Service • Guest Posts • Contacts • MLStack.Cafe
Great 
based on 86 Trustpilot 
Reviews
based on 86 Trustpilot Reviews