This set of R Programming Language Multiple Choice Questions & Answers (MCQs) focuses on “History of R – 2”.
1. In which year R-Core group was formed?
a) 1993
b) 1996
c) 1997
d) 1998
View Answer
Explanation: In 1996, a public mailing list was created. In 1997, the R Core Group was formed. R is for statistical computing and graphics. It compiles and runs on any operating system. It is free software which can easy to install and configure.
2. Version of R released to the public in 2000 was_________
a) 1.0.0
b) 1.0.3
c) 2.0.1
d) 1.1.0
View Answer
Explanation: In 2000 version 1.0.0 was released to the public. The other versions are released successively. R is a free software environment for statistical computing and graphics. There is no specified operating system for R.
3. R runs on the ____________ operating system.
a) Linux
b) Windows
c) Ubuntu
d) Any operating system
View Answer
Explanation: R language runs on any standard computing platform and operating platform. So R can run in any operating system. It compiles and runs on a wide variety of UNIX platforms, Windows and MacOS.
4. The primary source code copyright for R is held by the ___________
a) R Foundation
b) S Foundation
c) R and S foundation
d) C Foundation
View Answer
Explanation: The copyright for the primary source code for R is held by the R Foundation. The S foundation could not have R primary source code. R is a free software environment for statistical computing and graphics.
5. R is published under the __________ General Public License version.
a) A
b) B
c) C
d) GNU
View Answer
Explanation: R language is published under the GNU General Public License version. It includes compilers for C, C++, Objective-C and a host of other languages. The following licenses are in use for R or associated software such as packages.
6. You can download “base” R system from _________
a) A
b) B
c) CRAN
d) D
View Answer
Explanation: You can download from CRAN (Comprehensive R Archive Network). The Base R can be found in CRAN. The base R can be found in R studio. The base R system will be found in R studio.
7. Which of the following packages does not contain in “base” R system?
a) utils, graphics
b) mesh, compiler
c) splines, stats4
d) grDevices, datasets
View Answer
Explanation: Mesh does not belong to the base R system. The other utils, graphics, compiler, splines, stats4, grDevices, datasets will contain Base R system. There are many other packages also in R studio which were pre-installed.
8. There are more than ________ packages on CRAN that have been developed by users and programmers around the world.
a) 40
b) 400
c) 4000
d) 40000
View Answer
Explanation: There are more than 4000 packages on CRAN. A package bundles together code, data, documentation, and tests, and is easy to share with others. As of January 2015, there were over 4000 packages available on the Comprehensive R Archive Network, or CRAN, the public clearing house for R packages.
9. At higher level one “limitation” of R is that its functionality is based on __________
a) Consumer demand
b) User contributions
c) User contributions and Consumer demand
d) Lower level contributions
View Answer
Explanation: Its functionality is based on consumer demand and user contributions. It is only for the higher level. The capabilities of the R system generally reflect the interests of the R user community. However, now some of those communities have adopted R and we are seeing more code being written for those kinds of applications.
10. Which of the following command is used to print an object “x” in R?
a) printf(x)
b) print(x)
c) printx
d) print[x]
View Answer
Explanation: print(x) command is used to print. Print(x) is the basic syntax for R. We can directly print the variable without print function also. The functions in R are helpful to the user to simplify the problem.
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