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WorksheetsR Practice
Total questions: 17
Worksheet time: 51mins
Version of R released to the public in 2000 was_________
1.0.0
1.0.3
2.0.1
1.1.0
R runs on the ____________ operating system.
Linux
Windows
Ubuntu
Any operating system
You can download “base” R system from _________
A
B
CRAN
D
Which of the following command is used to print an object “x” in R?
printf(x)
print(x)
printx
print[x]
What will be the output of the following R code?
> x <- 6
> class(x)
“integer”
“numeric”
“real”
“imaginary”
What will be the output of the following R code?
> sqrt(-17)
-4.02
4.02
NaN
3.67
Who developed R?
Dennis Ritchie
John Chambers
Bjarne Stroustrup
Ross Ihaka
R was named partly after the first names of____R authors?
One
Two
Three
Four
R files has an extension ______
.R
.c
.Rp
.s
The following statement are true about R, except...
an integrated suite of software facilities for data manipulation, calculation and graphical display
a suite of operators for calculations on arrays, in particular matrices
graphical facilities for data analysis and display only directly at the computer but not on hardcopy
runs on all platforms
CRAN is abbreviations from...and what does CRAN mean?
Coherent R Active Network; the fundamental unit of shareable code
Cohorent R Archive Network; the public clearing house for R packages
Comprehensive R Archive Network; the public clearing house for R packages
Comprehensive R Active Network; the fundamental unit of shareable code
which part that shows the list of R objects you created during your R session?
1
2
3
4
R language is a dialect of which of the following languages?
S
C
MATLAB
SAS
__________ function is used to watch for all available packages in library.
lib()
fun.lib()
libr()
library()
________is used for comments
%
#
-
\\
To execute the line of source code ins script editor where the cursor currently resides you press the________
Ctrl +T
Ctrl + enter
Ctrl +R
Ctrl + Shift + enter
R is an__________programming language?
Closed source
GPL
Open source
Definite source
