In the following statement, if column ‘Rollno’ already exists in the DataFrame ‘D1’ then the assignment statement will _____________ D1['Rollno'] = [1,2,3] #There are only three rows in DataFrame D1'

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Question:
In the following statement, if column ‘Rollno’ already exists in the DataFrame ‘D1’ then the assignment statement will _____________
D1['Rollno'] = [1,2,3] #There are only three rows in DataFrame D1'

1.Return error

2.Replace the already existing values.

3.Add new column

4.None of the above

More MCQS Questions and answers

  1. A _______________ is a two-dimensional labelled data structure .
  2. DF1.loc[ ] method is used to ______ # DF1 is a DataFrame
  3. Display first row of dataframe ‘DF’
  4. If the following statement return (5, 3) it means _____ >>> DF.shape #DF is a DataFrame object
  5. In given code dataframe ‘D1’ has _____ rows and _____ columns. import pandas as pd S1 = pd.Series([1, 2, 3, 4], index = ['a', 'b','c','d']) S2 = pd.Series([11, 22, 33, 44], index = ['a', 'bb','c','dd']) D1 = pd.DataFrame([S1,S2])
  6. The following code create a dataframe named ‘D1’ with ______ rows. import pandas as pd LoD = [{'a':10, 'b':20}, {'a':5, 'b':10, 'c':20}] D1 = pd.DataFrame(LoD)
  7. The following statement will _________ df = df.drop(['Name', 'Class', 'Rollno'], axis = 1) #df is a DataFrame object
  8. The parameter axis=’index’ of rename( ) function is used to specify that the __
  9. The ________________parameter of append() method in DataFrame may be set to True, when we do not want to use row index labels.
  10. What we are doing in the following statement? dF1=dF1.append(dF2) #dF1 and dF2 are DataFrame object
  11. When we create DataFrame from List of Dictionaries, then dictionary keys will become ___________
  12. Which of the following attribute of DataFrame display all the values from DataFrame?
  13. Which of the following function is used to load the data from the CSV file into a DataFrame?
  14. Which of the following parameter is used to specify row or column in rename function of DataFrame?
  15. Write statement to transpose dataframe DF.
  16. ______________ parameter is used in append( ) function of DataFrame to get the column labels in sorted order.
  17. D1[ : ] = 77 , will set __________ values of a Data Frame ‘D1’ to 77.
  18. DataFrame created from single Series has ____ column.
  19. DataFrame.loc[ ] is an important method that is used for ____________ with DataFrames
  20. Display last two rows from dataframe ‘DF’
  21. Following statement will display ___________ rows from DataFrame ‘DF1’. >>> DF1.head()
  22. If the DataFrame has more than one row with the same label, then DataFrame.drop( ) method will delete _____
  23. In DataFrame, by default new column added as the _____________ column
  24. In given code dataframe ‘D1’ has _____ rows and ______ columns.
  25. In given code dataframe ‘D1’ has ________ rows and _______ columns. import pandas as pd LoD = [{‘a’:10, ‘b’:20}, {‘a’:5, ‘b’:10, ‘c’:20},{‘a’:7, ‘d’:10, ‘e’:20}] D1 = pd.DataFrame(LoD)
  26. In Pandas _______________ is used to store data in multiple columns.
  27. In the following statement, if column ‘Rollno’ already exists in the DataFrame ‘D1’ then the assignment statement will __________ D1['Rollno'] = 11
  28. In the following statement, if column ‘Rollno’ already exists in the DataFrame ‘D1’ then the assignment statement will __________ D1['Rollno'] = [1, 2] #There are only three rows in DataFrame D1'
  29. In the following statement, if column ‘Rollno’ already exists in the DataFrame ‘D1’ then the assignment statement will _____________ D1['Rollno'] = [1,2,3] #There are only three rows in DataFrame D1'
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  31. The append() method of DataFrame can also be used to append ____________to a DataFrame
  32. The default value for sep parameter is ____
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  34. The following code create a dataframe named ‘D1’ with _______________ columns.
  35. The following statement is __________ >>> DF=DF.rename({‘Maths’:’Sub1′,‘Science’:’Sub2′}, axis=’index’) #DF is a DataFrame
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  38. The following two statement will return _______________ >>> DF.loc[:,'Name'] #DF is a DataFrame object >>> DF['Name'] #DF is a DataFrame object
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  47. What will happen if in the rename( ) function we pass only a value for a row label that does not exist?
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  49. When we create DataFrame from Dictionary of List then List becomes the __________
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  51. When we create DataFrame from List of Dictionaries, then number of rows in DataFrame is equal to the _______
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  53. Which method is used to change the labels of rows and columns in DataFrame?
  54. Which method is used to delete row or column in DataFrame?
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  56. Which of the following attribute of DataFrame display the dimension of DataFrame
  57. Which of the following attribute of DataFrame is used to display column labels?
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  59. Which of the following attribute of DataFrame is used to display row labels?
  60. Which of the following function display the last ‘n’ rows from the DataFrame?
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  62. Which of the following is used to display first 2 rows of DataFrame ‘DF’?
  63. Which of the following is used to give user defined column index in DataFrame?
  64. Which of the following statement is Transposing the DataFrame ‘DF1’?
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  67. Write statement to display the column labels of DataFrame ‘DF’
  68. Write statement to display the data types of each column of dataframe ‘DF’.
  69. Write statement to display the dimension of dataframe ‘DF’.
  70. Write statement to display the row labels of ‘DF’.
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  73. Write the output of the statement >>>df.shape , if df has the following structure. Name Class Rollno 0 Amit 6 1 1 Anil 7 2 2 Ravi 8 3
  74. Write the output of the statement >>>df.size , if df has the following structure: Name Class Rollno 0 Amit 6 1 1 Anil 7 2 2 Ravi 8 3
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