Test Series - java script

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Test Number 61/92

Q: What kind of data can be run in R?
A. Binary
B. Text
C. Decimals
D. All kinds
Solution: The R language is widely used among statisticians and data miners for developing statistical software and data analysis. All kinds of data can be run in R.
Q: Which of the following is/are not the features of R?
A. Small
B. Self-contained
C. Extensible
D. Large
Solution: R and its libraries implement a wide variety of statistical and graphical techniques, including linear and nonlinear modelling, classical statistical tests, time-series analysis, classification, clustering, and others. As a language, R is small, self-contained and extensible.
Q: What is the advantage for Linux users using R?
A. They get a command sequence to install the particular Linux flavor
B. They get a compiled installer
C. Easily compatible
D. Runtime is less
Solution: Instead of a compiled installer, Linux users get the command sequence to install for their particular Linux flavor.
Q: Which of the following is the base install for R?
A. Contrib
B. Base
C. Rtools
D. RBase
Solution: Base is the binaries for base distribution. The PC installer comes in three flavors: Base is the base install, Contrib comes with compiled third-party packages, and Rtools comes with tools to build your own R packages.
Q: Which of the following comes with compiled third-party packages?
A. Contrib
B. Base
C. Rtools
D. RBase
Solution: Contrib are the binaries of contributed CRAN packages. The PC installer comes in three flavors: Base is the base install, Contrib comes with compiled third-party packages, and Rtools comes with tools to build your own R packages.
Q: Which of the following comes with tools to build your own R packages?
A. Contrib
B. Base
C. Rtools
D. RBase
Solution: Rtools provide the tools to build R and R packages. The PC installer comes in three flavors: Base is the base install, Contrib comes with compiled third-party packages, and Rtools comes with tools to build your own R packages.
Q: The code of the R language has an extension?
A. .Rl
B. .R
C. .lR
D. .RR
Solution: R is a programming language designed for statistical computing and graphics purposes. R is a file extension for a script written in R.
Q: Which of the following is used to run ad hoc R commands?
A. R Console
B. R Primer
C. Both R Console and R Primer
D. R timer
Solution: Interactive data analysis usually occurs on the R console that executes commands as you type them. R Console is a command-line environment for running ad hoc R commands.
Q: Which is the keyword used to open the Help window?
A. ()
B. #
C. ?
D. =
Solution: The help() function and ? help operator in R provides access to the documentation pages for R functions, data sets, and other objects, both for packages in the standard R distribution and for contributed packages. At any time, you can type ? (keyword) to open the help window for a particular subject.
Q: For a more extensive search, which keyword needs to be used?
A. ??
B. ?
C. ?=
D. =?
Solution: The help.search() or the ?? function scans the documentation for packages installed in your library. For a more extensive search, just type ?? (keyword).

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