AI & Data
Machine Learning Engineer Practice Test
20 multiple choice questions for machine learning engineers: Python, SQL, evaluation, overfitting, metrics, data leakage and deployment.
- Questions
- 20
- Time
- 20 min
- Pass mark
- 60%
No account or email needed.
About this test
This test is built around the Machine Learning Engineer role. It focuses on what matters between a notebook and production: judging a model honestly, avoiding common mistakes such as data leakage, choosing metrics, and keeping a deployed model healthy.
It is practice only and is not part of any job application.
What it covers
The question set has 24 questions: 11 easy, 10 medium and 3 hard. Each attempt draws 20 of them at random, so a second try is not the same test.
- Deployment and monitoring (2)
- Model evaluation (10)
- Python (5)
- SQL (2)
- Training and features (5)
Try a few sample questions
These are real questions from the set, with the answers and a short explanation. Read the question, decide, then open it to check.
Sample 1 · SQL · easyWhich clause filters individual rows before they are grouped?Show the answer
- HAVING
- WHERECorrect
- GROUP BY
- ORDER BY
WHERE filters rows before grouping. HAVING filters the groups afterwards.
Sample 2 · Python · easyWhich of these Python types is immutable?Show the answer
- list
- dict
- tupleCorrect
- set
A tuple cannot be changed after it is created. Lists, dictionaries and sets can.
Sample 3 · Model evaluation · easyWhat is overfitting?Show the answer
- A model that is too small
- A model that fits the training data too closely and performs worse on new dataCorrect
- A model that trains too fast
- A model with too few features
Signs include a large gap between training and validation scores.
How it works
- 20 multiple choice questions, drawn at random from a larger set.
- 20 minutes on the clock. The test submits itself when time runs out.
- Pass mark: 60%.
- No marks are taken off for wrong answers, so answer every question.
- Some questions have more than one correct answer. You must pick all of them to score.
- When you finish you see your score, the correct answers and a short explanation for each.
- Your answers save as you go, so a dropped connection will not lose your work.
- Please stay on the test page. Switching to another tab or window is recorded and you will see a warning.
- Copying text, printing and screenshots are not allowed during the test.
This role is open
This test is built around the Machine Learning Engineer role on our jobs board. Taking it is not part of the application.
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