R Programming Mock Test 1

10%

Question 1 of 10

1. The most convenient way to use R is at a graphics workstation running a ________ system.

windowing

matrix

running

interfacing

Question 1 of 10

Question 2 of 10

2. R language has superficial similarity with _________

MATLAB

Python

SAS

Question 2 of 10

Question 3 of 10

3. What is the class defined in the following R code?

    y<-c(FALSE,2)

Character

Integer

Logical

Numeric

Question 3 of 10

Question 4 of 10

4. A list is represented as a vector but can contain objects of ___________

Any class

Similar class

Different class

Same class

Question 4 of 10

Question 5 of 10

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

       x <- (“a”, “b”)
       as.logical(x)

Error

a b

“a” “b”

1 1

Question 5 of 10

Question 6 of 10

6. How can we define ‘infinity’ in R language?

Inf

NaN

Und

Sup

Question 6 of 10

Question 7 of 10

7. Point out the wrong statement?

R has sophisticated graphics capabilities

All of the mentioned

S’s base graphics system allows for very fine control over essentially every aspect of a plot or graph

One nice feature that R shares with many popular open source projects is frequent releases

Question 7 of 10

Question 8 of 10

8. In R language, a vector is defined that it can only contain objects of the ________

Different class

Any class

Same class

Similar class

Question 8 of 10

Question 9 of 10

9. Point out the wrong statement?

The help.search command (alternatively ??) allows searching for help in various ways

Windows versions of R have other optional help system also

$ R is used to start the R program

R is case insensitive as are most UNIX based packages, so A and a are different symbols and would refer to different variables

Question 9 of 10

Question 10 of 10

10. They primary R system is available from the ______

CRAN

CRWO

GNU

CRDO

Question 10 of 10