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MOO (MUD, Object-Oriented) is a programming language developed for creating MUDs or Multi-User Dungeons - a type of multiplayer real-time virtual world. It was designed to be simple and easy to learn, making it accessible for non-programmers to create their own virtual worlds. MOO is object-oriented, which means it groups data and functions into objects that can interact with each other. This makes the language flexible and adaptable, as objects can be modified or extended without affecting other parts of the program. Despite its simplicity, MOO is powerful enough to support complex programming tasks such as networking and database management.

Ask the right questions secure the right MOO talent among an increasingly shrinking pool of talent.

First 20 minutes

General MOO app knowledge and experience

The first 20 minutes of the interview should seek to understand the candidate's general background in MOO application development, including their experience with various programming languages, databases, and their approach to designing scalable and maintainable systems.

How would you explain the purpose of MOO programming?

MOO programming is used to create and manage virtual reality environments, often used in gaming or collaborative work environments. It allows objects and characters to interact in a virtual space.

What are some of the basic commands in MOO programming?

Some of the basic commands in MOO programming include 'create', 'add_verb', 'set_verb_code', 'recycle', and 'move'. These are used to create and manage objects within the virtual environment.

Describe the difference between 'create' and 'recycle' in MOO programming.

'Create' is used to create a new object in the MOO environment, while 'recycle' is used to delete an existing object.

How would you handle errors in MOO programming?

MOO has built-in error handling capabilities which include error objects and error-catching verbs. You would use these to catch and handle errors in a way that is appropriate for your specific application.

What are the basic data types in MOO programming?

MOO programming has several basic data types, including integers, floating-point numbers, strings, objects, errors, lists, and maps.

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What you’re looking for early on

Does the candidate have a strong understanding of MOO programming?

Has the candidate demonstrated problem-solving skills?

Is the candidate able to communicate effectively?

Does the candidate have experience with similar projects?

Next 20 minutes

Specific MOO development questions

The next 20 minutes of the interview should focus on the candidate's expertise with specific backend frameworks, their understanding of RESTful APIs, and their experience in handling data storage and retrieval efficiently.

Describe the difference between a list and a map in MOO programming.

A list is an ordered collection of elements, while a map is an unordered collection of key-value pairs. Lists are indexed by integers, while maps are indexed by any MOO value.

How would you design a simple game using MOO programming?

First, define the game objects and their interactions. Then, use MOO's object-oriented nature to model these objects and their behaviors. Use verbs to define the actions that can be taken, and properties to store the state of the game.

What are some advanced features of MOO programming?

Some advanced features of MOO programming include its built-in networking capabilities, its support for multi-user environments, and its powerful object-oriented nature.

Describe the difference between a verb and a property in MOO programming.

A verb in MOO programming defines an action that an object can take. A property, on the other hand, is used to store data about an object.

How would you implement inheritance in MOO programming?

Inheritance in MOO is implemented through the use of parent objects. An object can inherit properties and verbs from its parent object, allowing for code reuse and organization.

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At this point, a skilled MOO engineer should demonstrate strong problem-solving abilities, proficiency in MOO programming language, and knowledge of software development methodologies. Red flags include lack of hands-on experience, inability to articulate complex concepts, or unfamiliarity with standard coding practices.

Digging deeper

Code questions

These will help you see the candidate's real-world development capabilities with MOO.

What does this simple MOO code do?
$player:tell("Hello, World!")
This code sends the message 'Hello, World!' to the player.
What does this MOO code do?
for x in (players())
  $player:tell(x.name)
endfor
This code loops through all the players in the game and sends each player's name to the player.
What will be the output of this MOO code?
list = {1, 2, 3, 4, 5}
for x in (list)
  $player:tell(tostr(x))
endfor
This code will output the numbers 1 through 5, each on a new line, to the player.
What does this MOO code do?
fork (0)
  $player:tell("Hello, World!")
endfork
This code creates a new task that sends the message 'Hello, World!' to the player. The task is scheduled to run immediately.

Wrap-up questions

Final candidate for MOO Developer role questions

The final few questions should evaluate the candidate's teamwork, communication, and problem-solving skills. Additionally, assess their knowledge of microservices architecture, serverless computing, and how they handle MOO application deployments. Inquire about their experience in handling system failures and their approach to debugging and troubleshooting.

What are some ways to optimize performance in MOO programming?

Performance in MOO can be optimized by limiting the use of expensive operations, using built-in functions where possible, and minimizing network traffic.

Describe the difference between 'add_verb' and 'set_verb_code' in MOO programming.

'add_verb' is used to add a new verb to an object, while 'set_verb_code' is used to set or change the code of an existing verb.

How would you implement multi-user support in MOO programming?

Multi-user support in MOO is implemented through the use of player objects. Each player has a corresponding object in the MOO environment, and interactions between players are modeled through interactions between their objects.

MOO application related

Product Perfect's MOO development capabilities

Beyond hiring for your MOO engineering team, you may be in the market for additional help. Product Perfect provides seasoned expertise in MOO projects, and can engage in multiple capacities.

MOO Consultive assessments

MOO Application Conversion Assessment MOO Application Integration Assessment MOO Data & Database Integration Assessment

Custom MOO development projects

Custom MOO App Conversion MOO Custom App Development Process App UI Design for MOO Facelifts

Hiring guide for MOO Engineers

MOO Developer Hiring Guide

What you’re looking for early on

The ideal back-end app developer

What you’re looking to see on the MOO engineer at this point.

MOO Consultive assessments

Custom MOO development projects