R Programming Mock Test 5

10%

Question 1 of 10

1. MapReduce jobs submitted from either Oozie, Pig or Hive can be used to encode, improve and sample the data sets from _________ into R.

HDLS

HDLSV

HSSLV

HDFS

Question 1 of 10

Question 2 of 10

2. Which of the following R code snippet stops loop after 20 iterations?

for(i in 1:100) {
      print(i)
              if(i > 20) {
               break 
       } 
}

for(i in 2:100) {
      print("i")
              if(i > 150) {
               break 
       } 
}

for(i in 1:100) {
      print(i)
              if(i < 20) {
               break 
       } 
}

for(i in 1:100) {
      print(i)
              if(i > 19) {
               break 
       } 
}

Question 2 of 10

Question 3 of 10

3. What is the command used to store R objects in a file?

save (x, file=”x.data”)

save (x, file=x.Rdata)

save (x, file=”x.Rdata”);

save (x, file=”x.Rdata”)

Question 3 of 10

Question 4 of 10

4. _________ variables are categorical variables which can hold either string or numeric values.

Factor

Simpler

Function

Package

Question 4 of 10

Question 5 of 10

5. Point out the wrong statement?

Functions provides an abstraction of the code to potential users

Functions in R are “second class objects”

The writing of a function allows a developer to create an interface to the code, that is explicitly specified with a set of parameters

Writing functions is a core activity of an R programmer

Question 5 of 10

Question 6 of 10

6. How do you create log linear models in R language?

loghy()

loglm()

logmn()

logfn()

Question 6 of 10

Question 7 of 10

7. R has ________ statements that provide explicit looping.

Question 7 of 10

Question 8 of 10

8. _________ initiates an infinite loop right from the start.

repeat

never

set

break

Question 8 of 10

Question 9 of 10

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

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

NULL

5.5

Question 9 of 10

Question 10 of 10

10. How many types of data structures does R language have?

Question 10 of 10