R Programming Basics MCQ question and answer with solution

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Each section contains 100 MCQs on R Programming Basics .

A . . . . . . . . is a two-dimensional rectangular data set.

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

Discuss

Answer & Solution

Answer: Option C

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

Which function is used to combine the elements into a vector?

A) C() B) D() C) E() D) F()

Discuss

Answer & Solution

Answer: Option A

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

By what function we can create data frames?

A) Data.frames() B) Data.sets () C) Function () D) C ()

Discuss

Answer & Solution

Answer: Option A

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

Which of the following statement would print "0" "1" "2" "3" "4" "5" "6" for the following R code?

> x <- 0:6

A) as.character(x) B) as.logical(x) C) as.numeric(x) D) as.num(y)

Discuss

Answer & Solution

Answer: Option A

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

What will be the output of the following R code?

> x <- 6
> class(x)

A) "integer" B) "numeric" C) "real" D) "imaginary"

Discuss

Answer & Solution

Answer: Option B

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

What will be the Correct R code for the following output?

foo bar
1 1 TRUE
2 2 TRUE
3 3 FALSE
4 4 FALSE

A) > x <- data.frame(foo = 1:4, bar = c(F, T, F, F))
> x B) > x <- data.frame(foo = 1:6, bar = c(F, T, F, F))
> x C) > x <- data.frame(foo = 1:4, bar = c(T, T, F, F))
> x D) > x <- data.frame(foo = 14:1, bar = c(F, T, F, F))
> x

Discuss

Answer & Solution

Answer: Option C

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

. . . . . . . . function returns a vector of the same size as x with the elements arranged in increasing order.

A) sort() B) orderasc() C) orderby() D) sequence()

Discuss

Answer & Solution

Answer: Option A

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

R has how many atomic classes of objects?

A) 1 B) 2 C) 3 D) 5

Discuss

Answer & Solution

Answer: Option D

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

Point out the correct statement?

A) The usual operator, <-, can be thought of as a syntactic shortcut to expression operation B) Assignment can also be made using the function assignment() C) Vectors can be used in arithmetic expressions, in which case the operations are performed element by element D) seq() is used to delete the numbers

Discuss

Answer & Solution

Answer: Option C

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

Point out the wrong statement?

A) matrices or more generally arrays are multi-dimensional generalizations of vectors B) factors provide compact ways to handle categorical data C) vectors provide a convenient way to return the results of a statistical computation D) lists can be explicitly created using the list() function

Discuss

Answer & Solution

Answer: Option C

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