List of top Data Science A.I Cyber Security and Computer Sci. Questions on Data Science

Consider following statements :
A. Regression predicts categorical outcomes.

B. Classification models are used for continuous variable prediction.

C. Clustering is an unsupervised learning task.

D. Reinforcement learning uses rewards and penalties to improve performance.

E. Decision tree can be used for both classification and regression

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Consider the following steps of a data science workflow to be arranged in correct order :
A. Data preprocessing

B. Model building

C. Data collection

D. Data visualization and interpretation

E. Model evaluation

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Which clustering algorithm can detect clusters of arbitrary shape and handle noise effectively ?

Which visualization method is most effective for detecting outliers in multidimensional numerical data?

Which of the following is/are true about outliers?
(A) Linear Regression is not sensitive to outliers.
(B) Outliers can never be present in the test set.
(C) Outlier is a data point that is significantly close to other data points.
(D) The nature of our business problem determines how outliers are used.
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