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Questions & Answers › Tag: Data Science Basics
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Which of the following method is used to write a data frame data to an output CSV file?
AnsweredAdam asked 4 years ago • 
4785 views1 answers0 votes
________ is used as an argument of the readcsv method to make data of a specific column as an index.
AnsweredAdam asked 4 years ago • 
8217 views1 answers1 votes
Which of the following is used as an argument of read_csv method to skip first n lines of an input CSV file?
AnsweredAdam asked 4 years ago • 
7244 views1 answers1 votes
State whether the following statement is true or false? The read_csv method, by default, reads all blank lines of an input CSV file.
AnsweredAdam asked 4 years ago • 
7157 views1 answers0 votes
Which of the following is used as argument of read_csv method to treat data of specific columns as dates?
AnsweredAdam asked 4 years ago • 
6698 views1 answers0 votes
Which of the following method is used to read data from excel files?
AnsweredAdam asked 4 years ago • 
5052 views1 answers0 votes
State whether the following statement is true or false? The read_csv method can read multiple columns of an input file as indexes.
AnsweredAdam asked 4 years ago • 
7308 views1 answers0 votes
Which of the following expression returns data of column B of data frame df, defined below? import pandas as pd df = pd.DataFrame({'A':[34, 78, 54], 'B':[12, 67, 43]}, index=['r1', 'r2', 'r3'])
AnsweredAdam asked 4 years ago • 
7622 views1 answers0 votes
Which of the following expression is used to delete the column, A from a data frame named df?
AnsweredAdam asked 4 years ago • 
6988 views1 answers0 votes
Which of the following expression returns the second row of df, defined below? import pandas df = pd.DataFrame({'A':[34, 78, 54], 'B':[12, 67, 43]}, index=['r1', 'r2', 'r3'])
AnsweredAdam asked 4 years ago • 
7263 views1 answers0 votes
Which of the following expression is used to add a new column 'C' to a data frame df, with three rows?
AnsweredAdam asked 4 years ago • 
7873 views1 answers0 votes
What does the expression df.loc['r4'] = [67, 78] do for the data frame df, defined below? df = pd.DataFrame({'A':[34, 78, 54], 'B':[12, 67, 43]}, index=['r1', 'r2', 'r3'])
AnsweredAdam asked 4 years ago • 
7159 views1 answers0 votes
Which of the following expression returns the first two rows of df, defined below? import pandas as pd df = pd.DataFrame({'A':[34, 78, 54], 'B':[12, 67, 43]}, index=['r1', 'r2', 'r3'])
AnsweredAdam asked 4 years ago • 
6394 views1 answers0 votes
Which of the following expression returns last two rows of df, defined below? import pandas as pd df = pd.DataFrame({'A':[34, 78, 54], 'B':[12, 67, 43]}, index=['r1', 'r2', 'r3'])
AnsweredAdam asked 4 years ago • 
9468 views1 answers0 votes
Which of the following attributes or arguments are used to set column names of a data frame?
AnsweredAdam asked 4 years ago • 
4289 views1 answers0 votes
What is the shape of the data frame df defined in the below-shown code? import pandas as pd data = [{‘a’: 1, ‘b’: 2}, {‘a’: 5, ‘b’: 10, ‘c’: 20}] df = pd.DataFrame(data)
AnsweredAdam asked 4 years ago • 
2139 views1 answers0 votes
What is the output of the following code? import pandas as pd s = pd.Series([89.2, 76.4, 98.2, 75.9], index=list('abcd')) print(s[['c', 'a']])
AnsweredAdam asked 4 years ago • 
8120 views1 answers0 votes
Which of the following is not a Data Structure of Pandas?
AnsweredAdam asked 4 years ago • 
5480 views1 answers0 votes
Which of the following cannot be used to create a Data frame?
AnsweredAdam asked 4 years ago • 
3090 views1 answers0 votes
Which of the following expressions are used to check if each element of a series s is present in the list of elements [67, 32]. Series s is defined as shown below. s = pd.Series([99, 32, 67],list('abc'))
AnsweredAdam asked 4 years ago • 
5425 views1 answers0 votes
Which of the following argument is used to label the elements of a series?
AnsweredAdam asked 4 years ago • 
4227 views1 answers0 votes
What is the output of the expression 'b' in s, where s is the series defined as shown below?
AnsweredAdam asked 4 years ago • 
5047 views1 answers-1 votes
What is the shape of the data frame df defined in the below-shown code? import pandas as pd data = [{‘a’: 1, ‘b’: 2}, {‘a’: 5, ‘b’: 10, ‘c’: 20}] df = pd.DataFrame(data, columns=[‘a’, ‘b’])
AnsweredAdam asked 4 years ago • 
11115 views1 answers0 votes
What is the data type of series s defined in below code? import pandas as pd s = pd.Series([9.2, ‘hello’, 89])
AnsweredAdam asked 4 years ago • 
5200 views1 answers0 votes
Which of the following commands run only one test case, present in sample_module.py using pytest?
AnsweredAdam asked 4 years ago • 
11210 views1 answers0 votes
Pytest is available as a part of Python standard library. State true or false.
AnsweredAdam asked 4 years ago • 
5634 views1 answers0 votes
Pytest is capable of discovering and running tests written in unittest and nose. State true or false.
AnsweredAdam asked 4 years ago • 
4914 views1 answers0 votes
Which of the following option is used to generate Junit style test report in xml using pytest?
AnsweredAdam asked 4 years ago • 
7730 views1 answers0 votes
Which of the following decorator is used to transform a user defined function into a fixture using pytest?
AnsweredAdam asked 4 years ago • 
7183 views1 answers0 votes
Which of the following decorator is used to skip a test unconditionally, with pytest?
AnsweredAdam asked 4 years ago • 
7535 views1 answers0 votes
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