Product Perfect

JLogo is a computer programming language designed for use in education. It was developed at the Massachusetts Institute of Technology (MIT) in 1985 by Brian Silverman. JLogo is based on Logo, a programming language created by Seymour Papert in 1967. JLogo is a simplified version of Logo that is easier to learn and use. It is also more powerful than Logo, and it can be used to create a wider variety of programs. JLogo is used in schools around the world to teach students about computer programming and problem-solving.

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

First 20 minutes

General JLogo app knowledge and experience

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

What are the basic data types in JLogo?

The basic data types in JLogo are numbers, strings, lists, and booleans.

How would you declare a variable in JLogo?

In JLogo, you can declare a variable using the 'make' command. For example, 'make "x 10' would declare a variable named x and assign it the value 10.

What is the purpose of the 'repeat' command in JLogo?

The 'repeat' command in JLogo is used to repeat a block of code a specified number of times.

How would you create a procedure in JLogo?

In JLogo, you can create a procedure using the 'to' command followed by the procedure name, the commands, and then the 'end' command.

What is the difference between 'fd' and 'bk' commands in JLogo?

The 'fd' command moves the turtle forward a specified number of steps, while the 'bk' command moves the turtle backward a specified number of steps.

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What you’re looking for early on

Does the candidate have a solid understanding of JLogo programming language?

Can the candidate solve problems using JLogo?

Does the candidate have experience with projects similar to ours?

Is the candidate able to communicate effectively about their work and thought processes?

Next 20 minutes

Specific JLogo 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 the 'ifelse' command in JLogo?

The 'ifelse' command in JLogo is used to perform different actions based on a condition. It takes three inputs: a condition, a list of commands to execute if the condition is true, and a list of commands to execute if the condition is false.

What are the uses of 'show' and 'print' commands in JLogo?

Both 'show' and 'print' commands in JLogo are used to display output. However, 'show' displays the output in a way that can be read by JLogo, while 'print' displays the output in a way that can be read by humans.

Describe the difference between 'stop' and 'output' commands in JLogo.

The 'stop' command in JLogo is used to end a procedure, while the 'output' command is used to end a procedure and return a value.

How would you use the 'foreach' command in JLogo?

The 'foreach' command in JLogo is used to iterate over a list and execute a block of code for each item in the list.

What is the purpose of the 'catch' command in JLogo?

The 'catch' command in JLogo is used to handle errors. It takes two inputs: an error name and a list of commands to execute if that error occurs.

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

What does this code do in JLogo?
TO square :size REPEAT 4 [FD :size RT 90] END
This code defines a procedure named 'square' that takes one input ':size'. It repeats the commands in the bracket 4 times, which moves the turtle forward by ':size' steps and then turns right by 90 degrees. This draws a square of side length ':size'.
What will be the output of this code?
TO repeatWord :word :times IF :times > 0 [PRINT :word repeatWord :word SUBTRACT :times 1] END repeatWord 'Hello' 3
This code will print 'Hello' three times. It defines a recursive procedure 'repeatWord' that takes a word and a number as inputs. If the number is greater than 0, it prints the word and calls itself with the number decreased by 1.
What does this code do in JLogo?
TO range :start :end IF :start <= :end [OUTPUT (LIST :start range (ADD :start 1) :end)] END
This code defines a recursive procedure 'range' that takes two inputs, ':start' and ':end'. If ':start' is less than or equal to ':end', it outputs a list starting with ':start', followed by the result of calling 'range' with ':start' incremented by 1. This produces a list of numbers from ':start' to ':end'.
What is the purpose of this code snippet?
TO thread :action :times WAIT 0 REPEAT :times [:action] END thread [FD 100 RT 90] 4
This code defines a procedure 'thread' that takes an action and a number of times as inputs. It executes the action asynchronously, repeating it the specified number of times. The 'WAIT 0' command allows other procedures to execute in the meantime. In the example provided, the turtle will move forward 100 steps and turn right 90 degrees, 4 times asynchronously.

Wrap-up questions

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

How would you use the 'throw' command in JLogo?

The 'throw' command in JLogo is used to generate an error. It takes one input: the name of the error.

What is the difference between 'run' and 'runresult' commands in JLogo?

The 'run' command in JLogo is used to execute a list of commands and discard the result, while the 'runresult' command is used to execute a list of commands and return the result.

How would you use the 'invoke' command in JLogo?

The 'invoke' command in JLogo is used to call a Java method. It takes two inputs: a Java object and a method name, followed by any arguments.

JLogo application related

Product Perfect's JLogo development capabilities

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

JLogo Consultive assessments

JLogo Application Conversion Assessment JLogo Application Integration Assessment JLogo Data & Database Integration Assessment

Custom JLogo development projects

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

Hiring guide for JLogo Engineers

JLogo Developer Hiring Guide

What you’re looking for early on

The ideal back-end app developer

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

JLogo Consultive assessments

Custom JLogo development projects