Data Manipulation MCQ part-3

Que.Which of the following is an important parameter of read.table function?
a. file
b. header
c. sep
d. all of the mentioned
Que.Which of the following will set the character that represents missing value?
a. na.quote
b. na.strings
c. nrows
d. all of the mentioned
Que.Point out the wrong statement.
a. data.table inherits from data.frame
b. data.table is written in Java
c. data.table is faster at subsetting and updating data
d. none of the mentioned
Que.Which of the following package is used for reading excel data?
a. xlsx
b. xlsc
c. read.sheet
d. all of the mentioned
Que.Which of the following can be used to view all the tables in memory?
a. tables
b. alltable
c. table
d. none of the mentioned
Que.Which of the following function programmatically extract parts of XML file?
a. XmlSApply
b. XmlApply
c. XmlSApplyData
d. All of the mentioned
Que.Which of the following package is used for reading JSON data?
a. jsonlite
b. json
c. jsondata
d. all of the mentioned
Que.Extracting XML is the basis for most web scraping.
a. True
b. False
c. May be True or False
d. Can’t say
Que.Which of the following package is used to connect MySQL RDBMS with R?
a. RMySQL vignette
b. MySQL vignette
c. RSQL vignette
d. None of the mentioned
Que.Point out the correct statement.
a. HDF5 is a hierarchical format
b. HDF5 does not support range of different data types
c. HDF5 is used for storing small datasets
d. None of the mentioned

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