Data Science

Reading from Web and APIs

Question 1
Marks : +2 | -2
Pass Ratio : 50%
Which of the following can be used to view all the tables in memory?
tables
alltable
table
none of the mentioned
Explanation:
The table function is a very basic, but essential, function to master while performing interactive data analyses.
Question 2
Marks : +2 | -2
Pass Ratio : 50%
Which of the following function is used to read data off the webpages?
read.web
read.Lines
read.Line
all of the mentioned
Explanation:
read.Lines function will extract the web page data.
Question 3
Marks : +2 | -2
Pass Ratio : 33%
Extracting XML is the basis for most web scraping.
True
False
Explanation:
XML is particularly used in web applications.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
Which of the following is used to extract data from HTML code of websites?
Webscraping
Webdredging
Webcleaning
All of the mentioned
Explanation:
Webscraping is a great way to get data.
Question 5
Marks : +2 | -2
Pass Ratio : 50%
Which of the following package is used for reading GIS data?
rdgal
rgeos
raster
all of the mentioned
Explanation:
A geographic information system is a system designed to capture, store, manipulate, analyze, manage, and present all types of spatial or geographical data.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
Point out the wrong statement.
hdf5 can be used to reading/writing from disc in Python
rhdf5 is an interface for hdf5 format
maximum size of an HDF5 dataset is fixed when it is created
all of the mentioned
Explanation:
hdf5 can be used to reading/writing from disc in R.
Question 7
Marks : +2 | -2
Pass Ratio : 33%
Point out the wrong statement.
data.table inherits from data.frame
data.table is written in Java
data.table is faster at subsetting and updating data
none of the mentioned
Explanation:
data.table is written in C.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
Point out the correct statement.
XLConnect package has more options for manipulating access files
XLConnect vignette package can also be used for manipulating excel files
write.xlsx write out an excel file with different argument
None of the mentioned
Explanation:
write.xlsx write out an excel file with similar argument.
Question 9
Marks : +2 | -2
Pass Ratio : 33%
Which of the following package is used for reading HTML and XML data?
httr
http
httx
all of the mentioned
Explanation:
httr contains tools for Working with URLs and HTTP.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
Which of the following package loads data from SPSS?
read.spss(SPSS)
read.oct(SPSS)
read.xpot(SPSS)
all of the mentioned
Explanation:
SPSS is a comprehensive and flexible statistical analysis and data management solution.