Product Perfect

Jako is a statically typed, object-oriented programming language designed for rapid development of large-scale, complex software systems. It is based on the principles of functional programming and object-oriented programming, and is designed to be both safe and efficient. Jako was developed by a team of researchers at the University of California, Berkeley, in the early 1990s. The language was first released in 1995, and has since been adopted by a number of large companies, including Google, Amazon, and Microsoft.

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

First 20 minutes

General Jako app knowledge and experience

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

How would you define Jako?

Jako is a high-level, interpreted programming language that is easy to learn and use. It is designed for general-purpose programming and has a syntax that is similar to that of Python.

What are the key features of Jako?

Jako has several key features including dynamic typing, automatic memory management, support for multiple programming paradigms, and a large standard library.

Describe the difference between static and dynamic typing in Jako.

In static typing, the type of a variable is checked at compile-time. In dynamic typing, the type is checked at runtime. Jako uses dynamic typing.

How would you handle exceptions in Jako?

In Jako, exceptions can be handled using the try-except block. The code that can potentially cause an exception is put in the try block and the code to handle the exception is put in the except block.

What are the different data types in Jako?

Jako supports several data types including numbers, strings, lists, tuples, and dictionaries.

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What you’re looking for early on

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

Has the candidate demonstrated problem-solving skills?

Is the candidate able to communicate effectively?

Does the candidate have experience with projects similar to ours?

Next 20 minutes

Specific Jako 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 tuple in Jako.

A list is a mutable sequence of values, while a tuple is an immutable sequence. This means that you can change the elements of a list, but you cannot change the elements of a tuple once it is created.

How would you create a function in Jako?

In Jako, a function is defined using the def keyword, followed by the function name and parentheses. The code block within every function is indented.

What are decorators in Jako?

Decorators are a powerful feature in Jako that allow you to modify the behavior of a function or class. They are a form of metaprogramming and they have several uses such as logging, enforcing access control and authentication, and rate-limiting.

Describe the difference between a shallow copy and a deep copy in Jako.

A shallow copy creates a new object and inserts references to the objects found in the original. A deep copy creates a new object and recursively adds copies of the objects found in the original.

How would you implement multithreading in Jako?

Jako has a threading module that can be used to create and manage threads. You can create a new thread by creating an instance of the Thread class and calling its start method.

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

What does the following code do?
public class HelloWorld { public static void main(String[] args) { System.out.println("Hello, World!"); } }
This code prints 'Hello, World!' to the standard output.
What will be the output of the following code?
public class Test { public static void main(String[] args) { int x = 10; int y = 20; x = x + y - (y = x); System.out.println("x = " + x + ", y = " + y); } }
The output will be 'x = 20, y = 10'. The code swaps the values of x and y without using a temporary variable.
What does the following code do?
import java.util.Arrays; public class Test { public static void main(String[] args) { int[] arr = {1, 2, 3, 4, 5}; Arrays.sort(arr); System.out.println(Arrays.toString(arr)); } }
This code sorts an integer array in ascending order and prints the sorted array.
What does the following code do?
public class Test { public static void main(String[] args) { Thread t = new Thread(() -> { for(int i = 0; i < 5; i++) { System.out.println(i); } }); t.start(); } }
This code creates a new thread and runs a loop that prints numbers from 0 to 4 in the new thread.

Wrap-up questions

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

What are generators in Jako?

Generators are a type of iterable, like lists or tuples. Unlike lists, they do not allow indexing but they can still be iterated through with for loops. They are created using functions and the yield statement.

Describe the difference between an instance method, a class method, and a static method in Jako.

An instance method takes self as the first argument and can access and modify instance variables. A class method takes cls as the first argument and can modify class-level attributes. A static method doesn't take self or cls as the first argument and can't modify any attributes of the instance or class.

How would you implement inheritance in Jako?

In Jako, a class can inherit from another class by mentioning the base class in parentheses after the class name. The child class inherits all the methods and attributes of the base class and can also add new ones or override the ones from the base class.

Jako application related

Product Perfect's Jako development capabilities

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

Jako Consultive assessments

Jako Application Conversion Assessment Jako Application Integration Assessment Jako Data & Database Integration Assessment

Custom Jako development projects

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

Hiring guide for Jako Engineers

Jako Developer Hiring Guide

What you’re looking for early on

The ideal back-end app developer

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

Jako Consultive assessments

Custom Jako development projects