Data science Archives

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. Which of the following is used to compute the percent change over a given number of periods?

pct_change

percent_change

per_change

none of the mentioned

Detailed SolutionWhich of the following is used to compute the percent change over a given number of periods?

3. Which of the following list-like data structure is used for managing a dynamic collection of SparseArrays?

SparseList

GeoList

SparseSeries

All of the mentioned

Detailed SolutionWhich of the following list-like data structure is used for managing a dynamic collection of SparseArrays?

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

TRUE

nan

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

5. 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?

6. Point out the correct statement.

findLinearColumns will also return a vector of column positions can be removed to eliminate the linear dependencies

findLinearCombos will return a list that enumerates dependencies

the function findLinearRows can be used to generate a complete set of row variables from one factor

none of the mentioned

Detailed SolutionPoint out the correct statement.

7. Which of the following object you get after reading CSV file?

DataFrame

Character Vector

Panel

All of the mentioned

Detailed SolutionWhich of the following object you get after reading CSV file?

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

iid

pmd

all of the mentioned

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

9. Which of the following is an example of raw data?

original swath files generated from a sonar system

initial time-series file of temperature values

a real-time GPS-encoded navigation file

all of the mentioned

Detailed SolutionWhich of the following is an example of raw data?

10. What Python function is used to perform element-wise mathematical operations on Numpy arrays?

describe()

plt.plot()

df.apply()

np.add()

Detailed SolutionWhat Python function is used to perform element-wise mathematical operations on Numpy arrays?

Page 1 Page 2 Page 3 Page 4 Page 5

Exit mobile version