python for data science ai & development coursera week 4 quiz answers
Practice Quiz
1. What are the most common modes used when opening a file?
- (a)ppend, (r)edline, (w)rite
- (s)ave, (r)ead, (w)rite
- (a)ppend, (r)ead, (w)rite
- (a)ppend, (c)lose, (w)rite
2. What is the data attribute that will return the title of the file?
- File1.open()
- File1.mode
- File1.name
- File1.close()
4. What attribute is used to input data into a file?
- File1.close()
- File1.open()
- File1.write()
- File1.read()
6. How would you access the first-row and first column in the dataframe df?
- df.ix[0,0]
- df.ix[0,1]
- df.ix[1,0]
7. What is the proper way to load a CSV file using pandas?
- pandas.from_csv(‘data.csv’)
- pandas.load_csv(‘data.csv’)
- pandas.read_csv(‘data.csv’)
- pandas.import_csv(‘data.csv’)
8. Use this dataframe to answer the question.
How would you select the Genre disco? Select all that apply.
- df.iloc[6, ‘genre’]
- df.loc[6, 5]
- df.iloc[6, 4]
- df.loc[‘Bee Gees’, ‘Genre’]
Shuffle Q/A 1
9. Use this dataframe to answer the question.
Which will NOT evaluate to 20.6? Select all that apply.
- df.iloc[4,5]
- df.iloc[6,5]
- df.loc[4,’Music Recording Sales’]
- df.iloc[6, ‘Music Recording Sales (millions)’]
10. Use this dataframe to answer the question.
How do we select Albums The Dark Side of the Moon to Their Greatest Hits (1971-1975)? Select all that apply.
- df.iloc[2:5, ‘Album’]
- df.loc[2:5, ‘Album’]
- df.iloc[2:6, 1]
- df.loc[2:5, 1]
