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Numpy Online Test

The Online NumPy Test is preferred by recruiters to assess on-the-job skills of candidates before an interview. It reduces technical screening time by 80% by enabling employers to identify qualified candidates.

Customized Based On:

  • Experience/ difficulty level
  • Multiple skills in 1 assessment
  • Job description/ role requirements

Covered Topics:

Open Source Numerical Python Library
3d Plots/Visualizations
NumPy Array Dimensions
Negative Indexing
Data Types
Shape Property

Through slicing a portion of the array is selected, by mentioning the lower and upper limits. Slicing creates views from the actual array and does not copy them.

Array Slicing
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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.

Human Resources Manager

Singapore Government

reduction in screening time

Sample Numpy Online Test Questions

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

🧐 Question🔧 Skill💪 Difficulty⌛ Time
Join datasets
We want to join 2 datasets, which are both numpy arrays to do some data processing on the combined array. How would you recommend joining the 2 arrays?


  • union_set = set1.append(set2)
  • union_set = np.vstack([set1, set2])
  • union_set = np.concatenate([set1, set2])
  • All of the above
  • None of the above
NumPyEasy2 min

How to use the Adaface Numpy Online Test

Start screening candidates within minutes with the ready-to-go Online NumPy Test

1. Choose the most appropriate test for your role

2. Start inviting candidates to complete the assessment

3. Receive real time notifications and shortlist the best candidates

Customize the Adaface Online NumPy Test according to your job description

1. Get a custom assessment from our library of 500+ skills within 48 hours

2. Start inviting candidates to complete the assesment

3. Receive real time notifications and shortlist the best candidates

Adaface Online NumPy Test is trusted by enterprises worldwide

Morgan Stanley
SG Government
Ernst and Young
Optimum Solutions
United Nations
Love Bonito

About the Adaface Numpy Assessment Test

Evaluate technical and coding skills with Adaface skills assessment platform powered by an intelligent chatbot.


Open Source Numerical Python Library
3d Plots/Visualizations
NumPy Array Dimensions
Negative Indexing
Data Types
Shape Property

Through slicing a portion of the array is selected, by mentioning the lower and upper limits. Slicing creates views from the actual array and does not copy them.

Array Slicing
Seed Function
Copy and View

Recommended Roles:

NumPy Developer
Python Developer

Why You Should Use This NumPy Test

The NumPy 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.

The Adaface NumPy Online Test screens candidates for the typical skills recruiters look for NumPy Developer roles:

  • Previous experience as a Python Developer with SQL knowledge
  • Knowledge of Numpy/Pandas
  • Working knowledge of at least one popular Python framework (like Django, Flask or Pyramid)
  • Understanding of object-relational mapping (ORM)
  • Experience with front-end technologies (like JavaScript and HTML5)

The insights generated from this assessment can be used by recruiters and hiring managers to identify the best candidates for NumPy Developer roles. Anti-cheating features enable you to be comfortable with conducting assessments online. The NumPy Online Test is ideal for helping recruiters identify which candidates have the skills to do well on the job.

About NumPy/Python Developer Roles

NumPy is used to conduct a wide range of array-based mathematical operations. It extends Python with sophisticated data structures that provide efficient computations with arrays and matrices and a vast library of high-level mathematical functions that work on these arrays and matrices.

Typical NumPy/Python Developer responsibilities include:

  • Create efficient, scalable code
  • Create back-end components to boost responsiveness and overall performance
  • Incorporate user-facing components into programmes
  • Program testing and debugging
  • Enhance the functionality of current systems
  • Put in place security and data protection measures
  • Evaluate and rank feature requests
  • Collaborate with internal teams to comprehend user needs and propose technological solutions

Distribution Of Test Scores

The actual score distribution will vary based on your candidate pipeline quality, but you should typically expect ~20% of the candidates to do well on Adaface assessments.

The score distribution for our assessments follow the normal curve. This is a good sign- standardized tests like SAT and GRE follow the normal distribution (bell curve).

Status quo assessments typically have the exact opposite of the bell curve (too many candidates getting close to 0, too many candidates getting close to 100 and too few candidates in the middle). This is typically because they focus on theoretical questions or trick questions, which are very binary in nature- either you know the trick/ theory or you don’t.

How Adaface Is Different

Adaface conversational assessments are reflective of on-the-job skills and see an 86% completion rate as compared to ~50% for traditional assessment platforms.



Theoretical questions/ puzzles

Feels like a test

One-size-fits-all assessments




Questions for on-the-job skills





What is a custom assessment?

Every role is different and requires a custom assessment to identify top candidates efficiently. Adaface subject matter experts understand your job description/ role requirements and pick the most relevant questions from our library of 10000+ questions to create a technical assessment that helps you find the qualified candidates in your candidate pipeline quickly. All custom assessments are set up based on the job description, role requirements, must-have skills, experience level and salary range within a maximum of 48 hours and you will get an email notification once it goes live.

Check out a sample assessment here (no credit card required).

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.

How is Adaface different from other assessment tools?

We believe that status quo tech assessment platforms are not a fair way for companies to evaluate engineers because they focus on trick questions/ puzzles/ niche algorithms. We started Adaface to help companies find great engineers by assessing on-the-job skills required for a role. Read more about why we started Adaface.

Here's what's different with Adaface:

  • High quality non-googleable questions that test for on-the-job skills as opposed to theoretical knowledge.
  • A friendly conversational assessment with a chatbot, instead of sending a "test" to a candidate. This translates to a higher completion rate. Adaface assessments (86% candidate completion rate), as opposed to traditional tests (40-50% candidate completion rate)
  • Customized assessments for 700+ skills at different experience levels.

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

We have the following anti-cheating features in place:

  • Web proctoring
  • Webcam proctoring
  • Plagairism detection
  • Non-googleable questions
  • Secure browser

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?

The platform is completely self-serve, so here's one way to proceed:

  • You can sign up for free to get a feel for how it works.
  • The free trial includes one sample assessment (Java/ JavaScript) that you will find in your dashboard when you sign up. You can use it to review the quality of questions, and the candidate experience of a conversational test on Adaface.
  • To review the quality of questions, you can also review our public questions for 50+ skills here.
  • Once you're convinced that you want to try it out with real assessments and candidates, you can pick a plan according to your requirements.

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.

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

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