Product Perfect

Chill is a procedural programming language primarily used for telecommunication applications and embedded systems. Originally developed in the 1980s by the International Telecommunication Union (ITU), it was designed to improve the development efficiency of switch software. The language's name, Chill, is an acronym for CCITT High-Level Language, referencing its creator, the former International Telegraph and Telephone Consultative Committee (CCITT). It was widely adopted in Europe and Asia due to its strong support for concurrent programming. Despite its initial popularity, Chill was gradually replaced by more modern languages like C++ and Java.

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

First 20 minutes

General Chill app knowledge and experience

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

How would you define Chill programming language?

Chill is a procedural programming language designed for use in control systems, particularly in telecommunications.

What are some of the key features of Chill?

Some key features of Chill include strong typing, exception handling, and support for parallel processing.

Describe the difference between Chill and C++.

While both are procedural languages, Chill is specifically designed for control systems and has built-in support for parallel processing, while C++ is a general-purpose language with object-oriented features.

How would you handle exceptions in Chill?

In Chill, exceptions are handled using the ON EXCEPTION DO statement, which allows you to specify a block of code to be executed when a specified exception occurs.

What are the data types supported by Chill?

Chill supports several data types, including integer, real, boolean, character, and user-defined types.

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What you’re looking for early on

Does the candidate demonstrate a strong understanding of Chill programming?

Has the candidate shown problem-solving skills during the interview?

Is the candidate able to communicate effectively about technical concepts?

Does the candidate have experience with projects similar to ours?

Next 20 minutes

Specific Chill 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 implement parallel processing in Chill?

Parallel processing in Chill can be implemented using the PAR BEGIN and PAR END statements, which allow you to specify blocks of code to be executed in parallel.

What are the control structures available in Chill?

Chill provides several control structures, including if-else, switch-case, for, while, and repeat-until.

Describe the difference between the 'for' and 'while' loops in Chill.

The 'for' loop in Chill is used when the number of iterations is known in advance, while the 'while' loop is used when the number of iterations is not known and depends on a condition.

How would you declare and use an array in Chill?

In Chill, arrays are declared using the ARRAY keyword, followed by the size of the array and the type of its elements. They can be used by referring to their elements using index notation.

What are the string manipulation functions available in Chill?

Chill provides several string manipulation functions, including length, substring, concatenation, and comparison.

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

What does this simple Chill script do?
val x = 5
val y = 10
val z = x + y
println(z)
This script declares two variables x and y, assigns them the values 5 and 10 respectively, adds them together to get a third variable z, and then prints the value of z, which is 15.
What will be the output of this Chill script?
val list = List(1, 2, 3, 4, 5)
val filteredList = list.filter(_ % 2 == 0)
println(filteredList)
This script creates a list of integers from 1 to 5, filters out the odd numbers, and prints the resulting list. The output will be List(2, 4).
What does this Chill script do with the given array?
val arr = Array(1, 2, 3, 4, 5)
val sum = arr.reduce(_ + _)
println(sum)
This script declares an array of integers, calculates the sum of all elements in the array using the reduce function, and then prints the sum. The output will be 15.
What does this Chill script do in terms of threading?
import scala.concurrent.Future
import scala.concurrent.ExecutionContext.Implicits.global
val future = Future { Thread.sleep(1000); 42 }
future.onComplete(println)
This script creates a Future that sleeps for 1 second and then returns 42. It then registers a callback to print the result when the Future completes. This demonstrates basic usage of Futures for asynchronous programming in Chill.

Wrap-up questions

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

How would you implement recursion in Chill?

Recursion in Chill can be implemented by having a function call itself within its own definition.

Describe the difference between local and global variables in Chill.

Local variables in Chill are declared within a function and can only be accessed within that function, while global variables are declared outside all functions and can be accessed by any function.

How would you handle file input/output operations in Chill?

File input/output operations in Chill can be handled using the OPEN, READ, WRITE, and CLOSE statements.

Chill application related

Product Perfect's Chill development capabilities

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

Chill Consultive assessments

Chill Application Conversion Assessment Chill Application Integration Assessment Chill Data & Database Integration Assessment

Custom Chill development projects

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

Hiring guide for Chill Engineers

Chill Developer Hiring Guide

What you’re looking for early on

The ideal back-end app developer

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

Chill Consultive assessments

Custom Chill development projects