R Programming Basics MCQ question and answer with solution | R Programming MCQs

A. is.nan() is used to test objects if they are NA

B. is.nan() is used to test for NaN

C. NA values have a class

D. NA values have a class, so there are integer NA, character NA, etc

A. D

B. R

C. L

D. K

A. Intraction

B. Extraction

C. AND

D. OR

A. 10

B. 0 0 0 0 0 0 0 0 0 0

C. 01

D. 00120

A. FALSE TRUE TRUE TRUE TRUE TRUE TRUE

B. "0" "1" "2" "3" "4" "5" "6"

C. 0 1 2 3 4 5 6

D. 6 5 5 3 2 1

A. Character strings are entered using either matching double (") or single (') quotes

B. Character vectors may be concatenated into a vector by the c() function

C. Subsets of the elements of a vector may be selected by appending to the name of the vector an index vector in square brackets

D. All of the mentioned

A. dimensions

B. class

C. length

D. all of the mentioned

A. Factor

B. Matrix

C. Lists

D. Functions

A. sequel

B. Rep

C. seq

D. Grep

A. rep() is be used for replicating an object in various complicated ways

B. seq() function has four arguments

C. sequence() is a more general facility for generating sequences

D. numerical vectors are generated by conditions