How to use the Machine Learning MCQ Quiz
- 1. Answer the questionsChoose one option for each of the 15 questions.
- 2. Check your scoreSee which answers were right and which need work.
- 3. Read and retryUse the explanations to revise, then press Start again.
Topics covered
This quiz goes one level deeper than the data science basics quiz. It targets the reasoning questions that separate candidates who have trained models from those who have only read about them.
- Model behaviour: underfitting vs overfitting, bias and variance, regularisation.
- Algorithms: logistic regression, random forests, gradient boosting, k-means, PCA, KNN.
- Training: learning rate, activation functions, hyperparameters vs parameters.
- Evaluation: k-fold cross-validation, recall, ROC AUC and data leakage.
The wrong options are the mistakes people really make, such as reading a high accuracy on rare-event data as a good model, so each explanation doubles as a short lesson you can revise from before an interview.
Scoring
Each question is one mark with no negative marking, so the maximum is 15 / 15; 12 correct is 80%. Questions you skip are listed separately.
If you miss the learning rate or activation questions, see them in action in the gradient descent visualizer and the activation function plotter. For metrics, try your own numbers in the ROC AUC calculator. Explaining each answer out loud, as you would in an interview, is the fastest way to make it stick. The quiz scores in your browser and keeps no record of your answers.
Frequently asked questions
Is this enough for an ML interview?
It checks core concepts. Interviews also include coding and case questions, so practise building a model end to end.
Are the questions from a certification?
No. They are practice questions written by Uncodemy trainers.
Is the Machine Learning MCQ Quiz free?
Yes, the Machine Learning MCQ Quiz is free. The first time you check your score, you are asked for your name and WhatsApp number once. After that, this and every other Uncodemy tool opens straight away without the form.