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Welcome to the Data Types and Dataset Reading MCQs Page

Dive deep into the fascinating world of Data Types and Dataset Reading with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Data Types and Dataset Reading, a crucial aspect of R Programming. In this section, you will encounter a diverse range of MCQs that cover various aspects of Data Types and Dataset Reading, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within R Programming.

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Check out the MCQs below to embark on an enriching journey through Data Types and Dataset Reading. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of R Programming.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Data Types and Dataset Reading. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Data Types and Dataset Reading MCQs | Page 3 of 10

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Q21.
Which of the following statement would print “0” “1” “2” “3” “4” “5” “6” for the following R code?

a.

as.character(x)

b.

as.logical(x)

c.

as.numeric(x)

d.

as.num(y)

Discuss
Answer: (a).as.character(x)
Q22.
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: (a).rep() is be used for replicating an object in various complicated ways
Q23.
What will be the output of the following R code? 
x <- c("a", "b", "c")
> as.numeric(x)

a.

Warning

b.

Error

c.

Abnormal termination

d.

Prints x

Discuss
Answer: (a).Warning
Q24.
What will be the output of the following R code? 
> x <- c("a", "b", "c")
> as.logical(x)

a.

a b c

b.

NA NA NA

c.

0 1 2

d.

6 8 9

Discuss
Answer: (b).NA NA NA
Q25.
Point out the correct statement?

a.

The elements of a logical vector cannot have the values TRUE, FALSE, and NA

b.

Matrices are vectors with a dimension attribute

c.

Numerical vectors are generated by conditions

d.

seq() function has four arguments

Discuss
Answer: (b).Matrices are vectors with a dimension attribute
Q26.
What will be the output of the following R code? 
> m <- matrix(nrow = 2, ncol = 3)
 > dim(m)

a.

3 2

b.

2 3

c.

2 2

d.

4 5

Discuss
Answer: (b).2 3
Q27.
What will be the output of the following R code? 
> m <- matrix(1:6, nrow = 2, ncol = 3)
> m

a.

[,1] [,2] [,3]
[1,] 1 3 5
[2,] 2 4 6

b.

[,0] [,1] [,2]
[1,] 1 3 5
[2,] 2 4 6

c.

[,1] [,2] [,3]
[1,] 1 3 6
[2,] 2 4 5

d.

[,5] [,6] [,7]
[1,] 1 3 6
[2,] 2 4 5

Discuss
Answer: (a).[,1] [,2] [,3]
[1,] 1 3 5
[2,] 2 4 6
Q28.
What will be the output of the following R code? 
> m <- 1:10
> m

a.

1 2 3 4 5 6 7 8 9 10

b.

1 2 3 4 5 6 7 8 9 10 11

c.

0 1 2 3 4 5 6 7 8 9 10

d.

10 9 8 6 5 4 2 3 1 2

Discuss
Answer: (a).1 2 3 4 5 6 7 8 9 10
Q29.
What will be the output of the following R code? 
> x <- 1:3
> y <- 10:12
> cbind(x, y)

a.

x y
[1,] 6 10
[2,] 7 11
[3,] 8 12

b.

x y
[1,] 1 10
[2,] 2 11
[3,] 3 12

c.

x y
[1,] 1 4
[2,] 2 5
[3,] 3 6

d.

x y
[1,] 1 6
[2,] 2 5
[3,] 3 10

Discuss
Answer: (b).x y
[1,] 1 10
[2,] 2 11
[3,] 3 12
Q30.
Find the following type of vector? 
a <- c(1,2,5.3,6,-2,4)

a.

Numeric

b.

Character

c.

Integer

d.

Logical

Discuss
Answer: (a).Numeric
Page 3 of 10

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