Data science miscellaneous Archives - MCQ and Quiz for Exams

1. Which of the following reads a data.frame and creates text output referring to the Google Visualization API?

gvisAnnotatedLine

gvisTimeLine

gvisAnnotatedTimeLine

none of the mentioned

Detailed SolutionWhich of the following reads a data.frame and creates text output referring to the Google Visualization API?

2. ndarray.dataitemSize is the buffer containing the actual elements of the array.

TRUE

nan

nan

nan

Detailed Solutionndarray.dataitemSize is the buffer containing the actual elements of the array.

3. Which of the following testing is concerned with making decisions using data?

Probability

Hypothesis

Causal

None of the mentioned

Detailed SolutionWhich of the following testing is concerned with making decisions using data?

4. Which of the following random variables are the default model for random samples?

iid

id

pmd

all of the mentioned

Detailed SolutionWhich of the following random variables are the default model for random samples?

5. In data science, what is the primary goal of dimensionality reduction techniques like Principal Component Analysis (PCA)?

To reduce the number of features while preserving important information

To add more features to the dataset

To normalize data

To visualize data

Detailed SolutionIn data science, what is the primary goal of dimensionality reduction techniques like Principal Component Analysis (PCA)?

6. Usually replacing the standard error by its estimated value does change the CLT.

TRUE

nan

nan

nan

Detailed SolutionUsually replacing the standard error by its estimated value does change the CLT.

7. Which of the following is the probability calculus of beliefs, given that beliefs follow certain rules?

Bayesian probability

Frequency probability

Frequency inference

Bayesian inference

Detailed SolutionWhich of the following is the probability calculus of beliefs, given that beliefs follow certain rules?

8. What is the term for the process of converting categorical data into numerical form for machine learning?

Data normalization

Text vectorization

Feature scaling

One-hot encoding

Detailed SolutionWhat is the term for the process of converting categorical data into numerical form for machine learning?

9. Every open graphics device is assigned an integer greater than 2.

TRUE

nan

nan

nan

Detailed SolutionEvery open graphics device is assigned an integer greater than 2.

10. In data science, what does the term “cross-domain analysis” refer to?

Data aggregation

Analyzing data from different domains or fields to find common patterns

Model stacking

Data aggregation

Detailed SolutionIn data science, what does the term “cross-domain analysis” refer to?

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