Product Perfect

Golo is a lightweight, dynamic, and simple programming language for the Java Virtual Machine (JVM), developed primarily by the Dynamid research team at the CITI Laboratory in Lyon, France. Launched in 2012, it was designed to be an easy-to-learn language for Java developers, offering a simpler syntax while maintaining the ability to leverage the vast Java ecosystem. Golo supports imperative and functional programming styles, and its dynamism makes it a powerful scripting tool for JVM. The language also integrates seamlessly with existing Java libraries and frameworks, providing a bridge between Java and dynamic languages. Golo's source code is open-source and is available on GitHub for public access and contribution.

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

First 20 minutes

General Golo app knowledge and experience

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

How would you define Golo?

Golo is a simple, dynamic, weakly typed language for the Java Virtual Machine (JVM), with a special emphasis on concurrent programming.

What are the key features of Golo?

Golo is lightweight, easy to learn, supports imperative and functional programming, and has first-class functions and augmentations, among other features.

Describe the difference between Golo and Java.

While both run on the JVM, Golo is dynamically typed and supports functional programming, whereas Java is statically typed and primarily supports object-oriented programming.

How would you create a function in Golo?

In Golo, you can create a function using the 'function' keyword followed by the function name, parameters in parentheses, and the function body enclosed in braces.

What are augmentations in Golo?

Augmentations in Golo allow you to add methods to existing types, which can be useful for extending the functionality of a type without modifying its source code.

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What you’re looking for early on

Has the candidate demonstrated a firm understanding of Golo language?

How proficient is the candidate in handling Golo's dynamic and static typing?

Does the candidate have experience with functional and object-oriented programming?

Does the candidate understand the JVM and how to use Golo with it?

Next 20 minutes

Specific Golo 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.

How would you use augmentations in Golo?

You can use the 'augment' keyword followed by the type you want to augment and a block of methods to add to that type.

Describe the difference between 'let' and 'var' in Golo.

'let' is used to declare a constant, while 'var' is used to declare a variable that can be reassigned.

How would you handle exceptions in Golo?

Golo uses 'try/catch' blocks for exception handling, similar to Java. You can also use the 'throw' keyword to throw an exception.

What are closures in Golo?

Closures in Golo are blocks of code that can be passed around as values and executed on demand. They can capture and access variables from their surrounding scope.

How would you create and use a closure in Golo?

You can create a closure in Golo by enclosing a block of code in parentheses and using the '->' operator. You can then call the closure using its name followed by any necessary arguments in parentheses.

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At this point, a skilled Golo engineer should demonstrate strong problem-solving abilities, proficiency in Golo 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 Golo.

What does this simple Golo code do?
module hello.World

function main = |args| {
  println('Hello, world!')
}
This is a basic 'Hello, World!' program in Golo. It prints 'Hello, world!' to the console.
What does this Golo code do?
module hello.World

function main = |args| {
  let x = 10
  let y = 20
  println('The sum is: ' + (x + y))
}
This Golo code declares two variables 'x' and 'y', assigns them the values 10 and 20 respectively, and then prints the sum of these two variables.
What does this Golo code do?
module hello.World

function main = |args| {
  let arr = array[1, 2, 3, 4, 5]
  foreach i in arr {
    println(i)
  }
}
This Golo code creates an array with five elements and then iterates over the array, printing each element to the console.
What does this Golo code do?
module hello.World

function main = |args| {
  let a = async(
    |n| -> n * n,
    10
  )
  println(a:get())
}
This Golo code creates an asynchronous task that squares a number. It then waits for the task to complete and prints the result. In this case, it will print 100.

Wrap-up questions

Final candidate for Golo 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 Golo application deployments. Inquire about their experience in handling system failures and their approach to debugging and troubleshooting.

Describe the difference between a closure and a function in Golo.

While both can be called with arguments and return a value, a closure can capture and access variables from its surrounding scope, whereas a function cannot.

How would you create a module in Golo?

You can create a module in Golo using the 'module' keyword followed by the module name and a block of code that defines the module's functions and variables.

What are structs in Golo and how would you use them?

Structs in Golo are simple data types that can hold multiple values. You can create a struct using the 'struct' keyword followed by the struct name and a list of fields in parentheses.

Golo application related

Product Perfect's Golo development capabilities

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

Golo Consultive assessments

Golo Application Conversion Assessment Golo Application Integration Assessment Golo Data & Database Integration Assessment

Custom Golo development projects

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

Hiring guide for Golo Engineers

Golo Developer Hiring Guide

What you’re looking for early on

The ideal back-end app developer

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

Golo Consultive assessments

Custom Golo development projects