R Programming Basics MCQ question and answer with solution

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Each section contains 100 MCQs on R Programming Basics .

Point out the wrong statement?

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

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

If you explicitly want an integer, you need to specify the . . . . . . . . suffix.

A) D B) R C) L D) K

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

The first component can be accessed using . . . . . . . . operator.

A) Intraction B) Extraction C) AND D) OR

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

What will be the output of the following R code?

> x <- vector("numeric", length = 10)
> x

A) 10 B) 0 0 0 0 0 0 0 0 0 0 C) 01 D) 00120

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

What will be the output of the following R code?

> x <- 0:6
> as.logical(x)

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

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

Point out the correct statement?

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

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

Which of the following can be considered as object attribute?

A) dimensions B) class C) length D) all of the mentioned

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

The . . . . . . . . stores the nominal values as a vector of integers in the range of 1 to unique values in the nominal variable.

A) Factor B) Matrix C) Lists D) Functions

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

The . . . . . . . . function creates a regular sequence of values to form a vector.

A) sequel B) Rep C) seq D) Grep

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

Point out the correct statement?

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

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

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