Data Science

Pandas

Question 1
Marks : +2 | -2
Pass Ratio : 100%
Point out the wrong statement.
qgrid is an interactive grid for sorting and filtering DataFrames
Pandas DataFrames implement _repr_html_ methods which are utilized by IPython Notebook
Spyder is a cross-platform Qt-based open-source R IDE
None of the mentioned
Explanation:
Spyder is a cross-platform Qt-based open-source Python IDE.
Question 2
Marks : +2 | -2
Pass Ratio : 50%
Point out the correct statement.
Pandas consist of set of labeled array data structures
Pandas consist of an integrated group by engine for aggregating and transforming data sets
Pandas consist of moving window statistics
All of the mentioned
Explanation:
Some elements may be close to one another according to one distance and farther away according to another.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
Pandas follow the NumPy convention of raising an error when you try to convert something to a bool.
True
False
Explanation:
This happens in an if or when using the boolean operations, and, or, or not.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
The integer format tracks only the locations and sizes of blocks of data.
True
False
Explanation:
The block format tracks only the locations and sizes of blocks of data.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
Point out the wrong statement.
Series is 1D labeled homogeneously-typed array
DataFrame is general 2D labeled, size-mutable tabular structure with potentially heterogeneously-typed columns
Panel is generally 2D labeled, also size-mutable array
None of the mentioned
Explanation:
Panel is generally 3D labeled.
Question 6
Marks : +2 | -2
Pass Ratio : 50%
Which of the following makes use of pandas and returns data in a series or dataFrame?
pandaSDMX
freedapi
OutPy
none of the mentioned
Explanation:
freedapi module requires a FRED API key that you can obtain for free on the FRED website.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
Which of the following object you get after reading CSV file?
DataFrame
Character Vector
Panel
All of the mentioned
Explanation:
You get columns out of a DataFrame the same way you get elements out of a dictionary.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
Point out the correct statement.
All of the standard pandas data structures have a to_sparse method
Any sparse object can be converted back to the standard dense form by calling to_dense
The sparse objects exist for memory efficiency reasons
All of the mentioned
Explanation:
The to_sparse method takes a kind argument and a fill_value.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
Which of the following method is used for transforming a SparseSeries indexed by a MultiIndex to a scipy.sparse.coo_matrix?
SparseSeries.to_coo()
Series.to_coo()
SparseSeries.to_cooser()
None of the mentioned
Explanation:
Experimental api to transform between sparse pandas and scipy.sparse structures.
Question 10
Marks : +2 | -2
Pass Ratio : 50%
Point out the correct statement.
Statsmodels provides powerful statistics, econometrics, analysis and modeling functionality that is out of panda’s scope
Vintage leverages pandas objects as the underlying data container for computation
Bokeh is a Python interactive visualization library for small datasets
All of the mentioned
Explanation:
Bokeh goal is to provide elegant, concise construction of novel graphics in the style of D3.