General and Python Data Science Online Test
TestDome skill assessments are used by more than 7,000 companies and 450,000 individual test takers.
For Jobseekers
Practice your skills and earn a certificate of achievement when you score in the top 25%.
Take a Practice TestFor Companies
Test how candidates think, strategize, and solve problems so you can interview the best.
Sign Up to Offer This TestTestDome Skill Assessments
Used by over 450,000 jobseekers
Trusted by over 7,000 companies
Premium questions with real-world problems
The Data Science online test assesses a candidate’s ability to analyze data, extract information, suggest conclusions, and support decision-making, as well as their ability to take advantage of Python and its data science libraries such as NumPy, Pandas, or SciPy.
It's the ideal test for pre-employment screening. Data scientists and data analysts who use Python for their tasks should be able to leverage the functionality provided by Python data science libraries to extract and analyze knowledge and insights from data.
This test requires candidates to demonstrate their ability to apply probability and statistics when solving data science problems and to write programs using Python for the same purpose.
TestDome is trusted by businesses large and small
Practice your skills.
Sign up for a trial plan.
Free Sample Questions for General and Python Data Science Test
Our sample questions are free for companies to use on a trial plan. See more about our premium questions for paid plans below.
Pet Detection
A classifier that predicts if an image contains only a cat, a dog, or a llama produced the following confusion matrix:
True values | ||||
Dog | Cat | Llama | ||
Predicted values | Dog | 14 | 2 | 1 |
Cat | 2 | 12 | 3 | |
Llama | 5 | 2 | 19 |
What is the accuracy of the model, in percentages?
Login Table
A company stores login data and password hashes in two different containers:
- DataFrame with columns: Id, Login, Verified.
- Two-dimensional NumPy array where each element is an array that contains: Id and Password.
Elements on the same row/index have the same Id.
Implement the function login_table that accepts these two containers and modifies id_name_verified DataFrame in-place, so that:
- The Verified column should be removed.
- The password from NumPy array should be added as the last column with the name "Password" to DataFrame.
For example, the following code snippet:
id_name_verified = pd.DataFrame([[1, "JohnDoe", True], [2, "AnnFranklin", False]], columns=["Id", "Login", "Verified"])
id_password = np.array([[1, 987340123], [2, 187031122]], np.int32)
login_table(id_name_verified, id_password)
print(id_name_verified)
Should print:
Id Login Password 0 1 JohnDoe 987340123 1 2 AnnFranklin 187031122
Petri Dish
Two bacteria cultures, A and B, were set up in two different dishes, each covering 50% of its dish. Over 20 days, bacteria A's percentage of coverage increased to 70% and bacteria B's percentage of coverage reduced to 40%:
Practice your skills.
Pick the number of tests you need.
Pass/fail grouping
Our tests are designed to put candidates into either the pass group or the fail group so you can find the best candidates faster.
Full customization
We have pre-built tests and questions, but you can customize them however you like. Change the pass/fail scores, time requirements, and more.
Cheating protection
Use tests that solve real-world problems, with no answers that can be easily found online. Because we test performance and skills (not information), we allow the use of online resources, just like in real life. Copy/paste prevention and online proctoring via webcam prevent cheating.
Candidate reporting
Get an overview into the percentage of passes and fails. Then dive deeper into the results of your top candidates to select who goes onto the next phase of hiring.
Learn more
Sign up for a trial plan.
Premium Questions for General and Python Data Science Test
TestDome offers a premium questions library with 1000+ unique, hand-crafted questions whose answers can’t be found online. If you spot an answer somewhere online, we’ll give you a refund.
Question Names
These premium questions are included in this pre-built test and can be added to any multi-skill test. Please sign up for a paid plan to view the questions in detail.
Class Grades, Age and Earnings, Distribution Fitting, Median Height, Birthday Cards, Billiard Club Occupancy, Cheating Indicator, Patient Classification, Subscribers, Wine Quality, Distribution of Answers, Hiring Process, CTR, Bank Loan, Cubic Approximation, Clean CSV, Rain, Credit Wizard, Bacterial Growth, Credit Score, Free ThrowsCovered Skills
Testing of these skills is covered in this pre-built test because they’re closely related. On our paid plan, you can easily create your own custom multi-skill tests.
Python Data ScienceRecommended Job Roles
These are the job roles that we recommend for the General and Python Data Science online test.
Take or Offer the General and Python Data Science Online Test
For Jobseekers
Take a Practice TestFor Companies
Sign Up to Offer This TestHow TestDome works
1. Choose or create a test
2. Share your test via URL or email
3. Review overall results and pass/fail grouping
4. Dive deeper into individual results
Excellent support & free concierge service
We offer fast, hands-on support for any question or concern you might have. If you want help with building a custom test or inviting candidates, we’ll handle everything for you.
Contact Support for any questions or to request our free concierge service.
