Pandas

Who is the main author of pandas?

• Karl pearson

• Wes McKinney

• J D Hunter

• None of these

Which method applies the function on each individual data element of the dataframe?

• Apply ()

• Applymap ()

• hist()

• pivot ()

How to check if a data frame St has any missing values?

• df.null(). values.any()

• df.isnull(). values.any()

• df.empty(). values.any()

• df.empty().any()

Which of the following statements is true?

• Quantiles are points in a distribution that relate to the rank order of the values in their distribution

• pivoting technique rearranges data from rows and columns by possibly aggregating data from multiple sources in a report form so that data can be viewed in different perspectives

• Sorting refers to arranging data in a particular order

• All of these

What is the use of lambda function?

• One typically writes a lambda function on the fly when one wants to write a function for one time use

• It is a predefined function of pandas

• It is a predefined module of matplotlib

• None of these

Histogram belongs to

• Quantitative variable

• Single variable

• Linear variable

• All of these

What is the output of the following snippet

Which method is used to access vertical subset of a dataframe?

• iterrows()

• iteritems()

• mod()

• None of these

Given are two objects, a lst object namely lst1 and a series object ser1, both are having similar values, i.e. 2,4,6,8. Find out the output produced by following statements:

(I) print (lst1*2)

(II) print (ser1*2)

Which function allows us to discover and show the underlying frequency distribution of a set of continuous data?

• Bar graph

• Frequency polygon

• Five number summary

• None of these