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About the test:

The Perl Online test uses scenario-based MCQs to evaluate candidates on their proficiency in working with the Perl programming language, including their knowledge of its data types, control structures, and regular expressions. The test also evaluates a candidate's ability to work with Perl modules, handle file I/O, and process text and data using built-in functions and operators. The test includes a coding question to evaluate hands-on Perl programming skills.

Covered skills:

  • Perl programming language
  • Perl control structures
  • Perl file handling
  • Perl object-oriented programming
  • Perl web development
  • Perl syntax and data types
  • Perl regular expressions
  • Perl modules and packages
  • Perl database connectivity
  • Perl debugging and error handling

9 reasons why
9 reasons why

Adaface Perl Test is the most accurate way to shortlist Perl Developers

Reason #1

Tests for on-the-job skills

The Perl Online Test helps recruiters and hiring managers identify qualified candidates from a pool of resumes, and helps in taking objective hiring decisions. It reduces the administrative overhead of interviewing too many candidates and saves time by filtering out unqualified candidates at the first step of the hiring process.

The test screens for the following skills that hiring managers look for in candidates:

  • Ability to write efficient and clean Perl code
  • Familiarity with Perl syntax and data types
  • Proficiency in Perl control structures (loops, conditionals)
  • Understanding of Perl regular expressions and pattern matching
  • Experience in Perl file handling (reading, writing, manipulating files)
  • Knowledge of Perl modules and packages
  • Understanding of Perl object-oriented programming principles
  • Ability to connect to databases using Perl
  • Understanding of Perl web development concepts
  • Proficiency in Perl debugging and error handling
Reason #2

No trick questions

no trick questions

Traditional assessment tools use trick questions and puzzles for the screening, which creates a lot of frustration among candidates about having to go through irrelevant screening assessments.

View sample questions

The main reason we started Adaface is that traditional pre-employment assessment platforms are not a fair way for companies to evaluate candidates. At Adaface, our mission is to help companies find great candidates by assessing on-the-job skills required for a role.

Why we started Adaface
Reason #3

Non-googleable questions

We have a very high focus on the quality of questions that test for on-the-job skills. Every question is non-googleable and we have a very high bar for the level of subject matter experts we onboard to create these questions. We have crawlers to check if any of the questions are leaked online. If/ when a question gets leaked, we get an alert. We change the question for you & let you know.

How we design questions

These are just a small sample from our library of 10,000+ questions. The actual questions on this Perl Online Test will be non-googleable.

🧐 Question


Package: Destroy
What does the following Perl code print?


Package: Use Base
What does the following Perl code print?


Registration Queue
We want to register students for the next semester. All students have a receipt which shows the amount pending for the previous semester. A positive amount (or zero) represents that the student has paid extra fees, and a negative amount represents that they have pending fees to be paid. The students are in a queue for the registration. We want to arrange the students in a way such that the students who have a positive amount on the receipt get registered first as compared to the students who have a negative amount. We are given a queue in the form of an array containing the pending amount.
For example, if the initial queue is [20, 70, -40, 30, -10], then the final queue will be [20, 70, 30, -40, -10]. Note that the sequence of students should not be changed while arranging them unless required to meet the condition.
⚠️⚠️⚠️ Note:
- The first line of the input is the length of the array. The second line contains all the elements of the array.
- The input is already parsed into an array of "strings" and passed to a function. You will need to convert string to integer/number type inside the function.
- You need to "print" the final result (not return it) to pass the test cases.

For the example discussed above, the input will be:
20 70 -40 30 -10

Your code needs to print the following to the standard output:
20 70 30 -40 -10


Visitors Count
A manager hires a staff member to keep a record of the number of men, women, and children visiting the museum daily. The staff will note W if any women visit, M for men, and C for children. You need to write code that takes the string that represents the visits and prints the count of men, woman and children. The sequencing should be in decreasing order. 


Expected Output: 

‘W’ has the highest count, then ‘C’, then ‘M’. 
⚠️⚠️⚠️ Note:
- The input is already parsed and passed to a function.
- You need to "print" the final result (not return it) to pass the test cases.
- If the input is- “MMW”, then the expected output is "2M1W" since there is no ‘C’.
- If any of them have the same count, the output should follow this order - M, W, C.
🧐 Question🔧 Skill


Package: Destroy

2 mins



Package: Use Base

2 mins



Registration Queue

30 mins



Visitors Count

30 mins

🧐 Question🔧 Skill💪 Difficulty⌛ Time
Package: Destroy
Medium2 mins
Package: Use Base
Medium2 mins
Registration Queue
Easy30 minsSolve
Visitors Count
Medium30 minsSolve
Reason #4

1200+ customers in 75 countries

customers in 75 countries

With Adaface, we were able to optimise our initial screening process by upwards of 75%, freeing up precious time for both hiring managers and our talent acquisition team alike!

Brandon Lee, Head of People, Love, Bonito

Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment Perl Online Test in your hiring process is that it is an elimination tool, not a selection tool. In other words: you want to use the test to eliminate the candidates who do poorly on the test, not to select the candidates who come out at the top. While they are super valuable, pre-employment tests do not paint the entire picture of a candidate’s abilities, knowledge, and motivations. Multiple easy questions are more predictive of a candidate's ability than fewer hard questions. Harder questions are often "trick" based questions, which do not provide any meaningful signal about the candidate's skillset.

Science behind Adaface tests
Reason #6

1 click candidate invites

Email invites: You can send candidates an email invite to the Perl Online Test from your dashboard by entering their email address.

Public link: You can create a public link for each test that you can share with candidates.

API or integrations: You can invite candidates directly from your ATS by using our pre-built integrations with popular ATS systems or building a custom integration with your in-house ATS.

invite candidates
Reason #7

Detailed scorecards & benchmarks

View sample scorecard
Reason #8

High completion rate

Adaface tests are conversational, low-stress, and take just 25-40 mins to complete.

This is why Adaface has the highest test-completion rate (86%), which is more than 2x better than traditional assessments.

test completion rate
Reason #9

Advanced Proctoring

Learn more

About the Perl Assessment Test

Why you should use Pre-employment Perl Online Test?

The Perl Online Test makes use of scenario-based questions to test for on-the-job skills as opposed to theoretical knowledge, ensuring that candidates who do well on this screening test have the relavant skills. The questions are designed to covered following on-the-job aspects:

  • Understanding and applying Perl syntax and data types
  • Implementing control structures in Perl
  • Utilizing regular expressions in Perl
  • Performing file handling in Perl
  • Working with modules and packages in Perl
  • Applying object-oriented programming principles in Perl
  • Establishing database connectivity in Perl
  • Developing web applications using Perl
  • Debugging and handling errors in Perl
  • Handling exceptions and errors in Perl

Once the test is sent to a candidate, the candidate receives a link in email to take the test. For each candidate, you will receive a detailed report with skills breakdown and benchmarks to shortlist the top candidates from your pool.

What topics are covered in the Perl Online Test?

  • Perl Programming Language

    Perl is a high-level, general-purpose programming language mainly used for automation, system administration, and web development. It is known for its powerful text processing capabilities, making it ideal for tasks such as parsing files and manipulating strings. Assessing Perl programming skills in this test helps evaluate a candidate's ability to write efficient, reliable, and maintainable code in Perl.

  • Perl Syntax and Data Types

    Understanding Perl syntax and data types is essential for writing correct and readable Perl code. This skill involves gaining knowledge about the different types of data that can be used in Perl, such as scalars, arrays, and hashes, as well as understanding the syntax rules and conventions of the language.

  • Perl Control Structures

    Control structures allow programmers to dictate the flow of execution in a program. Testing candidates on their knowledge of Perl control structures ensures that they can effectively use constructs like if-else statements, loops, and switch statements to create logical and efficient code.

  • Perl Regular Expressions

    Regular expressions are powerful tools for pattern matching and text manipulation in Perl. Assessing candidates' skills in Perl regular expressions measures their ability to write and understand complex patterns, perform string substitutions, and extract specific information from text.

  • Perl File Handling

    File handling skills are crucial for tasks such as reading from and writing to files in Perl. Candidates who have a good understanding of Perl file handling will know how to open, read, write, and close files, as well as handle errors or exceptions that may occur during these operations.

  • Perl Modules and Packages

    Perl modules and packages allow programmers to create reusable and modular code. Assessing candidates' knowledge of Perl modules and packages ensures they can properly organize their code, make use of existing modules, and create their own reusable components for better code maintainability and reusability.

  • Perl Object-Oriented Programming

    Object-oriented programming (OOP) is an important paradigm in Perl for creating and organizing code in the form of objects, which encapsulate data and behavior. Evaluating candidates' skills in Perl OOP involves assessing their ability to create classes, define methods, handle inheritance, and apply OOP principles to solve problems.

  • Perl Database Connectivity

    Perl's database connectivity capabilities allow programmers to interact with databases, perform queries, and retrieve or modify data. Testing candidates on Perl database connectivity measures their ability to establish connections, execute SQL statements, handle transactions, and effectively work with databases within Perl applications.

  • Perl Web Development

    Perl is widely used in web development for tasks such as building dynamic websites, handling form data, and interacting with web servers. Evaluating candidates' skills in Perl web development ensures they can use the appropriate frameworks and libraries, work with web protocols, handle sessions, and create web applications using Perl.

  • Perl Debugging and Error Handling

    Debugging and error handling skills are essential for finding and fixing issues in Perl code and handling errors gracefully. Testing candidates on Perl debugging and error handling assesses their ability to identify and resolve bugs, use debugging tools effectively, and implement robust error handling strategies to enhance the reliability and maintainability of their code.

  • Full list of covered topics

    The actual topics of the questions in the final test will depend on your job description and requirements. However, here's a list of topics you can expect the questions for Perl Online Test to be based on.

    Scalar conversion functions
    Array functions
    Hash functions
    Control structures
    Conditional statements
    Regular expressions
    Pattern matching
    File input/output
    File manipulation
    Object-oriented programming
    Database connectivity
    Database queries
    Database transactions
    Web development
    CGI programming
    HTML templating
    Session management
    Debugging techniques
    Error handling
    Testing and troubleshooting

What roles can I use the Perl Online Test for?

  • Perl Developer
  • Remote Perl Engineer
  • Senior Perl Engineer
  • SQL Perl Developer

How is the Perl Online Test customized for senior candidates?

For intermediate/ experienced candidates, we customize the assessment questions to include advanced topics and increase the difficulty level of the questions. This might include adding questions on topics like

  • Implementing advanced Perl concepts and techniques
  • Optimizing Perl code for performance
  • Utilizing Perl for system administration tasks
  • Implementing network programming in Perl
  • Working with Perl frameworks and libraries
  • Designing and developing secure Perl applications
  • Creating multithreaded applications in Perl
  • Testing and maintaining Perl code
  • Integrating Perl with other programming languages
  • Implementing best practices in Perl development

The coding question for experienced candidates will be of a higher difficulty level to evaluate more hands-on experience.

Singapore government logo

The hiring managers felt that through the technical questions that they asked during the panel interviews, they were able to tell which candidates had better scores, and differentiated with those who did not score as well. They are highly satisfied with the quality of candidates shortlisted with the Adaface screening.

reduction in screening time

Perl Hiring Test FAQs

Can I combine multiple skills into one custom assessment?

Yes, absolutely. Custom assessments are set up based on your job description, and will include questions on all must-have skills you specify. Here's a quick guide on how you can request a custom test.

Do you have any anti-cheating or proctoring features in place?

We have the following anti-cheating features in place:

  • Non-googleable questions
  • IP proctoring
  • Screen proctoring
  • Web proctoring
  • Webcam proctoring
  • Plagiarism detection
  • Secure browser
  • Copy paste protection

Read more about the proctoring features.

How do I interpret test scores?

The primary thing to keep in mind is that an assessment is an elimination tool, not a selection tool. A skills assessment is optimized to help you eliminate candidates who are not technically qualified for the role, it is not optimized to help you find the best candidate for the role. So the ideal way to use an assessment is to decide a threshold score (typically 55%, we help you benchmark) and invite all candidates who score above the threshold for the next rounds of interview.

What experience level can I use this test for?

Each Adaface assessment is customized to your job description/ ideal candidate persona (our subject matter experts will pick the right questions for your assessment from our library of 10000+ questions). This assessment can be customized for any experience level.

Does every candidate get the same questions?

Yes, it makes it much easier for you to compare candidates. Options for MCQ questions and the order of questions are randomized. We have anti-cheating/ proctoring features in place. In our enterprise plan, we also have the option to create multiple versions of the same assessment with questions of similar difficulty levels.

I'm a candidate. Can I try a practice test?

No. Unfortunately, we do not support practice tests at the moment. However, you can use our sample questions for practice.

What is the cost of using this test?

You can check out our pricing plans.

Can I get a free trial?

Yes, you can sign up for free and preview this test.

I just moved to a paid plan. How can I request a custom assessment?

Here is a quick guide on how to request a custom assessment on Adaface.

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40 min tests.
No trick questions.
Accurate shortlisting.
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