R Programming Mock Test 5

10%

Question 1 of 10

1. How is a Data object represented internally in R language?

unclass (as.D (2018-12-28))

unclass (as.dat (“2018-12-28″))

unclass (as.time (“2018-12-28″))

unclass (as.Date (“2018-12-28″))

Question 1 of 10

Question 2 of 10

2. ___________ function is used to apply an expression for a given dataset.

Unwith()

With()

That()

This()

Question 2 of 10

Question 3 of 10

3. Which of the following R code will print "Hello, world!"?

> f <- function() {
-             cat("Hello world!\n")
+ }
<= f()

 
> f <- function() {
+              cat("Hello, world!\n")
+ }
> f()

>  f <- function() {
+              cat("Hello, World!\n")
+ }
< f()

> f <- function() {
+             cat("Hello world!\n")
+ }
>>= f()

Question 3 of 10

Question 4 of 10

4. __________ package is used to speed up data frame management code.

Table

Dplyr

Data.dplyr

Data.table

Question 4 of 10

Question 5 of 10

5. Which of the following R code will print "Neither"?

> y <- "banana"
> switch(y, fruit = "banana", vegetable = "broccoli", "Neither")

> y >- "banana"
> y(y, fruit = "banana", vegetable = "broccoli", "Neither")

 
> y <- "brocolli"
> switch(y, fruit = "banana", vegetable = "broccoli", "Neither")

 
> y <- "meat"
> switch(y, fruit = "banana", vegetable = "broccoli", "Neither")

Question 5 of 10

Question 6 of 10

6. What are the data types in R on which binary operators can be applied?

Scalars, Matrices and Vectors

Vectors

Matrices

Scalars

Question 6 of 10

Question 7 of 10

7. ___________ can be used for storing the data for long-term.

HDLS

HSSLV

HDFS

HDLSV

Question 7 of 10

Question 8 of 10

8. __________ is the best way for communicating the results of data analysis using the R language.

Single document

Files

Structures

Loadings

Question 8 of 10

Question 9 of 10

9. What will be the output of the following R code?

> x <- 3
> switch(x, 2+2, mean(1:10), rnorm(5))

Error

5.5

2.2903605 2.3271663 -0.7060073 1.3622045 -0.2892720

NULL

Question 9 of 10

Question 10 of 10

10. What are the different types of sorting algorithms available in R language?

Bubble

Selection

Merge

All sorts

Question 10 of 10