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Welcome to the Formats,Objects and Operations MCQs Page

Dive deep into the fascinating world of Formats,Objects and Operations with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Formats,Objects and Operations, a crucial aspect of R Programming. In this section, you will encounter a diverse range of MCQs that cover various aspects of Formats,Objects and Operations, 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 Formats,Objects and Operations. 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 Formats,Objects and Operations. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Formats,Objects and Operations MCQs | Page 1 of 10

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Q1.
Which of the following is used for reading in saved workspaces?

a.

unserialize

b.

load

c.

get

d.

set

Discuss
Answer: (b).load
Q2.
Point out the wrong statement?

a.

write.table is used for for writing tabular data to text files (i.e. CSV) or connections

b.

writeLines is used for for writing character data line-by-line to a file or connection

c.

dump is used for for dumping a textual representation of multiple R objects

d.

all of the mentioned

Discuss
Answer: (d).all of the mentioned
Q3.
________ is used for outputting a textual representation of an R object.

a.

dput

b.

dump

c.

dget

d.

dset

Discuss
Answer: (a).dput
Q4.
Which of the following argument denotes if the file has a header line?

a.

header

b.

sep

c.

file

d.

footer

Discuss
Answer: (a).header
Q5.
Point out the correct statement?

a.

unserialize is used for converting an R object into a binary format for outputting to a connection

b.

save is used for saving an arbitrary number of R objects in binary format to a file

c.

The read.data() function is one of the most commonly used functions for reading data

d.

save is not used for saving an arbitrary

Discuss
Answer: (b).save is used for saving an arbitrary number of R objects in binary format to a file
Q6.
Which of the following statement would read file “foo.txt”?

a.

data <- read.table(“foo.txt”)

b.

read.data <- read.table(“foo.txt”)

c.

data <- read.data(“foo.txt”)

d.

data <- data(“foo.txt”)

Discuss
Answer: (a).data <- read.table(“foo.txt”)
Q7.
Which of the following function is identical to read .table?

a.

read.csv

b.

read.data

c.

read.tab

d.

read.del

Discuss
Answer: (a).read.csv
Q8.
Which of the following code would read 100 rows?

a.

initial <- read.table(“datatable.txt”, nrows = 100)

b.

tabAll <- read.table(“datatable.txt”, colClasses = classes)

c.

initial <- read.table(“datatable.txt”, nrows = 99)

d.

initial <- read.table(“datatable.txt”, nrows = 101)

Discuss
Answer: (a).initial <- read.table(“datatable.txt”, nrows = 100)
Q9.
What will be the output of the following R code? 
> y <- data.frame(a = 1, b = "a")
> dput(y)

a.

structure(list(a = 1, b = list(1L, .Label = "a", class = "factor")), .Names= c("a",
"b"), row.names = c(NA, -1L), class = "data.frame")

b.

list(list(a = 1, b = list(1L, .Label = "a", class = "factor")), .Names= c("a",
"b"), row.names = c(NA, -1L), class = "data.frame")

c.

structure(list(a = 1, b = structure(1L, .Label = "a", class = "factor")), .Names= c("a",
"b"), row.names = c(NA, -1L), class = "data.frame")

d.

Error

Discuss
Answer: (c).structure(list(a = 1, b = structure(1L, .Label = "a", class = "factor")), .Names= c("a",
"b"), row.names = c(NA, -1L), class = "data.frame")
Q10.
Which of the following is used for reading tabular data? 
> y <- data.frame(a = 1, b = "a")
> dput(y, file = "y.R")
> new.y <- dget("y.R")
> new.y

a.

a b
1 1 a

b.

a b
1 2 b

c.

a b
2 1 a

d.

b a
1 a a

Discuss
Answer: (a).a b
1 1 a
Page 1 of 10

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