Hiring guide for EuLisp-1.5 Engineers

EuLisp-1.5 Developer Hiring Guide

EuLisp-1.5 is a version of the EuLisp programming language, which is an object-oriented, general-purpose programming language that was designed by a group of European researchers in the 1980s and 1990s. The "Eu" in its name stands for "European", reflecting its origin. The main goal behind EuLisp's development was to create a simple yet efficient Lisp dialect that could be easily implemented and used on various computing platforms. It incorporates features from other languages such as Scheme and Common Lisp but also introduces new concepts like modules or classes. In EuLisp-1.5, objects are first-class entities with support for multiple inheritance (a feature where an object or class can inherit characteristics and features from more than one parent object or class). It also supports dynamic typing - meaning you don't have to explicitly define the data type of variables during declaration; it will automatically determine this at runtime. It has two levels: Level-0 which provides basic functionalities suitable for scripting tasks while Level-1 includes advanced mechanisms like meta-object protocol enabling users to modify aspects of the system behavior dynamically. Despite being less popular compared to other versions of Lisp such as Common Lisp or Scheme, it remains influential due to its unique approach towards combining simplicity with powerful abstraction mechanisms.

Ask the right questions secure the right EuLisp-1.5 talent among an increasingly shrinking pool of talent.

First 20 minutes

General EuLisp-1.5 app knowledge and experience

The first 20 minutes of the interview should seek to understand the candidate's general background in EuLisp-1.5 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 EuLisp?
The basic data types in EuLisp include integer, float, string, symbol, list, vector, and function.
How would you define a function in EuLisp?
In EuLisp, a function is defined using the 'defun' keyword followed by the function name, parameters, and the body of the function.
What are the control structures in EuLisp?
Control structures in EuLisp include 'if', 'cond', 'while', 'for', 'case', and 'do'.
How would you create a list in EuLisp?
A list in EuLisp can be created using the 'list' function or by enclosing elements in parentheses.
Describe the difference between 'eq' and 'equal' in EuLisp.
'eq' tests whether two symbols or numbers are the same object, while 'equal' tests whether two structures have the same shape and contents.
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What you’re looking for early on

Does the candidate demonstrate a strong understanding of EuLisp-1.5?
Can the candidate effectively problem solve using EuLisp-1.5?
Has the candidate shown the ability to work well in a team?
Does the candidate have experience with other Lisp dialects?

Next 20 minutes

Specific EuLisp-1.5 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 handle exceptions in EuLisp?
Exceptions in EuLisp are handled using the 'catch' and 'throw' functions. 'catch' establishes a new exception handler, while 'throw' signals an exception.
What are the sequence functions in EuLisp?
Sequence functions in EuLisp include 'length', 'elt', 'reverse', 'append', 'remove', and 'sort'.
How would you implement recursion in EuLisp?
Recursion in EuLisp is implemented by having a function call itself within its own definition.
Describe the difference between 'let' and 'let*' in EuLisp.
'let' allows for simultaneous bindings, while 'let*' allows for sequential bindings.
How would you create a custom data type in EuLisp?
A custom data type in EuLisp can be created using the 'defclass' keyword followed by the class name and its attributes.
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The ideal back-end app developer

What you’re looking to see on the EuLisp-1.5 engineer at this point.

At this point, a skilled EuLisp-1.5 engineer should demonstrate strong problem-solving abilities, proficiency in EuLisp-1.5 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 EuLisp-1.5.

What does the following EuLisp code do?
(defun factorial (n) (if (<= n 1) 1 (* n (factorial (- n 1)))))
This is a recursive function that calculates the factorial of a given number. If the input number 'n' is less than or equal to 1, it returns 1. Otherwise, it multiplies 'n' by the factorial of 'n-1'.
What will be the output of the following EuLisp code?
(let ((x 5)) (let ((x 3) (y x)) (+ x y)))
The output of the code will be 8. In the inner 'let' statement, 'x' is redefined as 3 and 'y' is defined as the outer 'x' which is 5. The sum of 'x' and 'y' is 8.
What does the following EuLisp code do?
(defun mapcar (fn lst) (if (null lst) nil (cons (fn (car lst)) (mapcar fn (cdr lst)))))
This function applies the function 'fn' to each element of the list 'lst'. It returns a new list that contains the results. This is similar to the built-in 'mapcar' function in Lisp.
What does the following EuLisp code do?
(defclass thread () ((id :accessor thread-id :initarg :id) (state :accessor thread-state :initarg :state)))
This code defines a class named 'thread' with two instance variables: 'id' and 'state'. The ':accessor' keyword is used to generate getter and setter methods for these variables. The ':initarg' keyword is used to specify the argument names for initializing these variables when creating a new 'thread' object.

Wrap-up questions

Final candidate for EuLisp-1.5 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 EuLisp-1.5 application deployments. Inquire about their experience in handling system failures and their approach to debugging and troubleshooting.

What are the object-oriented features of EuLisp?
Object-oriented features of EuLisp include classes, objects, inheritance, encapsulation, polymorphism, and message passing.
How would you implement multiple inheritance in EuLisp?
Multiple inheritance in EuLisp can be implemented by specifying multiple superclasses in the 'defclass' definition.
Describe the difference between 'defun' and 'defmethod' in EuLisp.
'defun' is used to define a regular function, while 'defmethod' is used to define a method that belongs to a class.

EuLisp-1.5 application related

Product Perfect's EuLisp-1.5 development capabilities

Beyond hiring for your EuLisp-1.5 engineering team, you may be in the market for additional help. Product Perfect provides seasoned expertise in EuLisp-1.5 projects, and can engage in multiple capacities.