say 'Hello, World!'.webp){kind=logo}
Ask the right questions to secure the right ARexx talent among an increasingly shrinking pool of talent.
ARexx is a computer programming language developed by William S. Hawes in 1987, designed for the Amiga line of computers. It's an implementation of the Rexx language, originally created by IBM, but tailored specifically for the AmigaOS operating system. ARexx provides a way to automate and script tasks, and to communicate between different software applications. Its ease of use and powerful scripting capabilities made it a popular choice for Amiga users and developers. The information about ARexx can be found in various historical documents and articles about the Amiga computer system.
The next 20 minutes of the interview should attempt to focus more specifically on the development questions used, and the level of depth and skill the engineer possesses.
Error handling in ARexx can be done using the SIGNAL ON condition_name instruction. When an error occurs, execution jumps to a label specified by the condition_name.
ARexx provides several control structures including IF-THEN-ELSE, SELECT, DO WHILE, DO UNTIL, and LOOP.
A function is a reusable section of code that performs a specific task and returns a value. A subroutine is also a reusable section of code, but it does not return a value. Instead, it performs a task and then control returns to the main program.
In ARexx, you can comment by using /* for multiple lines and -- for single lines.
ARexx supports only one data type, the string. All data, including numbers, are stored and manipulated as strings.
These skills are important for understanding project requirements and collaborating with team members.
This can be beneficial as it shows the candidate's ability to learn and adapt to different coding languages.
Software development often requires collaboration, so good teamwork skills are important.
This knowledge is necessary as ARexx is primarily used on these platforms.
These skills are important for a developer to troubleshoot and solve coding issues.
This is crucial as the position requires the candidate to write and debug ARexx scripts.
The next 20 minutes of the interview should attempt to focus more specifically on the development questions used, and the level of depth and skill the engineer possesses.
Parameters can be passed to a subroutine in ARexx by value or by reference. Passing by value is the default. To pass by reference, the variable name must be preceded by a period.
INTERPRET executes a string as an ARexx instruction, while EVAL evaluates a string as an ARexx expression.
The ADDRESS instruction in ARexx is used to specify the environment in which subsequent commands are to be executed.
String manipulation in ARexx can be done using various built-in functions such as substr, pos, strip, translate, and length.
The PARSE instruction in ARexx is used to split a string into multiple substrings based on a specified pattern.
A skilled ARexx engineer should demonstrate a deep understanding of the AmigaDOS operating system, excellent coding abilities in ARexx, and ability to debug and optimize scripts. Red flags would include lack of detail in discussing past projects or inability to explain complex coding concepts.
say 'Hello, World!'x = 5
y = 10
say x + yarr.1 = 'apple'
arr.2 = 'banana'
arr.0 = 2
say arr.1
say arr.2x = 1
y = 2
do while x < 5
say x
x = x + y
endclass = 'Fruit'
object = 'Apple'
say class objectx = 5
if x > 3 then do
say 'x is greater than 3'
else
say 'x is not greater than 3'
endThe final few interview questions for a ARexx candidate should typically focus on a combination of technical skills, personal goals, growth potential, team dynamics, and company culture.
Some best practices for optimizing performance in ARexx include avoiding unnecessary string manipulations, using the native functions and instructions whenever possible, and minimizing file I/O.
Recursion in ARexx can be implemented by having a function call itself. Care must be taken to ensure that the recursion has a base case to prevent infinite recursion.
File I/O in ARexx can be done using the OPEN, CLOSE, READLN, and WRITELN instructions.
In ARexx, you can interact with the operating system using the ADDRESS instruction to send commands, or by using the SYSTEM function to execute a command and return its output.
A stem variable in ARexx is a type of array. You create a stem variable by appending a period to a variable name. You can then use the stem variable by appending an index to it.
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