Hiring guide for BeanShell Engineers

BeanShell Developer Hiring Guide

BeanShell is a lightweight scripting language for Java, originally developed by Patrick Niemeyer in 2000. It allows traditional Java syntax and extends it with common scripting conveniences, making it a popular tool among developers. BeanShell is fully embeddable, allowing it to be integrated into applications for scripting, configuration, and testing. The language was instrumental in the development of the Java Platform Debugger Architecture (JPDA) and JUnit tests. Information about BeanShell can be found on its official website and in various software development resources.

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

First 20 minutes

General BeanShell app knowledge and experience

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

How would you install BeanShell?
You can install BeanShell by downloading the latest version from the official website, and then including the .jar file in your classpath.
What are some basic commands in BeanShell?
BeanShell has many basic commands similar to Java, such as: for, while, if, switch, try/catch/finally, etc. It also has commands like import, source, load, save, run, exec, etc.
How would you use BeanShell in a Java application?
You can use BeanShell in a Java application by creating an Interpreter object, and then invoking the eval method with a script to execute.
What does the 'eval' method in BeanShell do?
The 'eval' method in BeanShell interprets and executes a given script, and returns the result of the last statement executed.
What are the different ways to run a BeanShell script?
You can run a BeanShell script from the command line, from a Java application using the Interpreter class, or from a web browser using the BeanShell servlet.
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What you’re looking for early on

Does the candidate have a deep understanding of Java?
Has the candidate demonstrated familiarity with BeanShell syntax and features?
Did the candidate show problem-solving skills during the technical interview?
Does the candidate have experience with scripting languages?

Next 20 minutes

Specific BeanShell 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 BeanShell and Java.
BeanShell is a scripting language that has a syntax similar to Java, but it is more dynamic and flexible. It supports scripting features like loose types, commands, and method closures that are not available in Java.
How would you handle exceptions in BeanShell?
You can handle exceptions in BeanShell using the try/catch/finally commands, similar to Java.
What are the advantages of using BeanShell over Java?
BeanShell is more flexible and dynamic than Java. It supports scripting features, loose types, and commands that are not available in Java. It is also easier to learn and use for non-programmers.
How would you debug a BeanShell script?
You can debug a BeanShell script by using the debug() command to turn on debugging output, and the trace() command to trace method calls.
Describe the difference between a BeanShell script and a Java program.
A BeanShell script is a script written in the BeanShell scripting language, while a Java program is a program written in the Java programming language. BeanShell scripts are more dynamic and flexible than Java programs, and they can be run directly without compilation.
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The ideal back-end app developer

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

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

What does this simple BeanShell code do?
int x = 10;
This code declares an integer variable 'x', assigns it a value of 10, and then prints the value of 'x' to the console.
What will be the output of this BeanShell code?
String str = 'BeanShell';
print(str.substring(4, 8));
The output will be 'Shell'. The substring() method extracts the characters from a string, between two specified indices, and returns the new sub string.
What does this BeanShell code do with the array?
int[] arr = {1, 2, 3, 4, 5};
for(int i: arr) {
This code declares an array 'arr' and then iterates over each element in the array. For each element, it multiplies the element by 2 and prints the result.
What does this BeanShell code do related to threading?
thread() {
  print('Hello from thread');
This code defines a thread function that prints 'Hello from thread' when called. It then calls this function, creating a new thread that executes the print statement.

Wrap-up questions

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

How would you use BeanShell in a web application?
You can use BeanShell in a web application by using the BeanShell servlet, which allows you to run BeanShell scripts from a web browser.
What are some advanced features of BeanShell?
Some advanced features of BeanShell include: loose types, method closures, optional object wrappers, dynamic commands, and event scripting.
Describe the difference between loose types and strict types in BeanShell.
Loose types in BeanShell allow you to declare variables without specifying their types, while strict types require you to specify the type of each variable. In loose mode, BeanShell will attempt to infer the type of a variable based on its value.

BeanShell application related

Product Perfect's BeanShell development capabilities

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