Practice R Programming Multiple Choice Questions with Answers Quiz-1

Q.1.

What will be the output of the following R code? x <- c(NA,y <- c(NA, x + y

Symbol
Missing data
5
15.5

Q.2.

R was named partly after the first names of____R authors?

One
Two
Three
Four

Q.3.

__________ function is used to watch for all available packages in library.

lib()
fun.lib()
libr()
library()

Q.4.

Predictive analysis is the branch of __________analysis?

Core
Advanced
Both

Q.5.

In R studio, Scripts will run on ___________________

Script editors
Console
Terminal
GCC compiler

Q.6.

The following block for loop is for the _ programming language:

C
R
JS
None of these

Q.7.

Which one is true about R packages ? (the answer can be more than one)

(a), (c), (d), (b)
(a), (c), (b), (d)
(d), (b), (c), (a)
(b), (a), (b), (d)

Q.8.

Choose the following statement that is false about Bioconductor!

Most Bioconductor components are not distributed as R packages
open source
provide tools for the analysis and comprehension of high-throughput genomic data.
None of these

Q.9.

The broad goals of the Bioconductor project are....

To provide widespread access to a broad range of powerful statistical and graphical methods for the analysis of genomic data.
To further scientific understanding by producing high-quality documentation and reproducible research.
To train researchers on computational and statistical methods for the analysis of genomic data.
None of these

Q.10.

________command is used to exit R programming?

quit()
qu()
exit
None of these

Q.11.

_________code is used for box and whisker plot in R.

scatter.smooth()
boxplot()
plot()
abline()

Q.12.

_________code is used for scatter plot in R.

scatter.plain()
scatter()
plot()
None of these

Q.13.

We wish to calculate the correlation between two columns of a dataset. Which of the below codes will achieve the purpose?

cor(A, B)
corr(A, B)
coreA, B)
correlation(A, B)

Q.14.

Which of the following graph can be used for simple summarization of data?

Scatterplot
Barplot
Overlaying
None of these

Q.15.

__________code can be used to plot the correlation matrix in the form of correlogram

corplot()
correlationplot()
corrplot()
coreplot()

Q.16.

___________shortcut used to clear the console.

Ctrl + K
Ctrl + L
Ctrl + C
Ctrl + V

Q.17.

_________code is used to run linear regression model in R.

linear.model()
sum()
lm()
None of the above

Q.18.

________ generate random Normal variates with a given mean and standard deviation.

dnorm
rnorm
pnorm
rpois

Q.19.

Which of the following finds the maximum value in the vector x

rm(x)
all(x)
max(x)
maximum(x)

Q.20.

Who created R?

Dennis Ritchie
John Chambers
jarne Stroustrup
Ross Ihaka

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