SET x = 5
SET y = 10
WRITE x + y.webp){kind=logo}
Ask the right questions to secure the right Caché ObjectScript talent among an increasingly shrinking pool of talent.
Caché ObjectScript is a proprietary, object-oriented programming language developed by InterSystems. It is used to interact with the Caché database and build applications on the Caché platform. ObjectScript is a highly dynamic language that supports procedural and object-oriented programming, and it is designed to be easy to use for rapid application development. It provides powerful data access capabilities and offers built-in support for SQL and multidimensional storage. It is primarily used in healthcare applications due to its ability to handle large amounts of data efficiently.
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.
Caché Objects are instances of Caché classes. They are used to encapsulate data and the methods that operate on that data.
To create a new class, you would use the Class keyword followed by the name of the class. Inside the class, you can define properties and methods.
While traditional SQL is primarily used for data manipulation in a relational database, Caché ObjectScript is designed to interact with the Caché database and supports both procedural and object-oriented programming. It also provides native SQL support.
Some of the main features include: native support for SQL, seamless integration with the Caché database, support for multi-dimensional arrays, and the ability to write web applications.
Caché ObjectScript is a powerful, dynamic scripting language used to interact with the Caché database. It supports procedural and object-oriented programming paradigms.
This is important as technology is constantly evolving, and the candidate will need to continually learn and adapt to stay effective in their role.
Problem-solving skills are key in any programming role, as the candidate will often need to find solutions to issues and bugs in the code.
Good communication and teamwork skills are essential in any development role, as the candidate will likely need to work closely with other developers, analysts, and stakeholders.
This is important because Caché ObjectScript is primarily used for manipulating and managing data in the InterSystems Caché database.
A solid grasp of OOP principles is necessary as Caché ObjectScript is an object-oriented language.
This is critical because the candidate needs to be able to effectively write and troubleshoot code in Caché ObjectScript.
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.
Caché ObjectScript supports several types of collections, including lists, arrays, and sets.
The %SQL.Statement class can be used to execute SQL queries. You can create an instance of the class, prepare a SQL query, and then execute it.
The %Status system class is used to represent the outcome of an operation. It can be used to check if an operation was successful or if it failed.
Caché ObjectScript provides a Try-Catch-Finally construct for error handling. You can also handle errors using the status codes returned by methods.
Global variables are stored in the database and persist across different sessions, while local variables are only available within the current session.
A skilled Caché ObjectScript engineer should demonstrate proficiency in ObjectScript programming, an understanding of Caché database structures, and problem-solving abilities. Red flags include lack of practical experience, difficulty with technical questions or inability to articulate complex concepts clearly.
SET x = 5
SET y = 10
WRITE x + ySET str = "Hello, World!"
WRITE $LENGTH(str)SET arr = $LISTBUILD(1, 2, 3, 4, 5)
WRITE $LIST(arr, 3)JOB ^MyRoutine
WRITE "Job started."Class Person Extends %Persistent
{
Property Name As %String;
Property Age As %Integer;
}SET x = 5
TRY {
SET y = x / 0
} CATCH ex {
WRITE ex.DisplayString()
}The final few interview questions for a Caché ObjectScript candidate should typically focus on a combination of technical skills, personal goals, growth potential, team dynamics, and company culture.
While traditional SQL has a fixed set of data types, Caché ObjectScript provides a more flexible and extensible type system. In addition to basic types like string and number, it also supports complex types like objects and collections.
Caché ObjectScript provides classes and methods for creating web applications. You can define classes that generate HTML, handle HTTP requests, and interact with the database.
The %Library package contains a set of standard classes that are used in Caché ObjectScript. These classes provide basic functionality like string manipulation, date and time handling, and mathematical operations.
Inheritance can be implemented by defining a class that extends another class using the Extends keyword.
Persistent classes are stored in the database and can be accessed directly using SQL. Serial classes are used to represent complex structures within a single database field.
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