Explore topic-wise MCQs in R Programming.

This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your R Programming knowledge and support exam preparation. Choose a topic below to get started.

1.

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)
Answer» B. tabAll <- read.table(“datatable.txt”, colClasses = classes)
Discussion
2.

Which of the following function is identical to read .table?

A. read.csv
B. read.data
C. read.tab
D. read.del
Answer» B. read.data
Discussion
3.

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”)
Answer» B. read.data <- read.table(“foo.txt”)
Discussion
4.

Which of the following argument denotes if the file has a header line?

A. header
B. sep
C. file
D. footer
Answer» B. sep
Discussion
5.

________ is used for outputting a textual representation of an R object.

A. dput
B. dump
C. dget
D. dset
Answer» B. dump
Discussion
6.

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

A. unserialize
B. load
C. get
D. set
Answer» C. get
Discussion
7.

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. all of the mentioned
Answer» B. tabAll <- read.table(‚Äö√Ñ√∂‚àö√ë‚àö‚à´datatable.txt‚Äö√Ñ√∂‚àö√ë‚àöœÄ, colClasses = classes)
Discussion
8.

Which of the following function is identical to read.table ?

A. read.csv
B. read.data
C. read.tab
D. None of the mentioned
Answer» B. read.data
Discussion
9.

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. none of the mentioned
Answer» B. read.data <- read.table(‚Äö√Ñ√∂‚àö√ë‚àö‚à´foo.txt‚Äö√Ñ√∂‚àö√ë‚àöœÄ)
Discussion
10.

Which of the following argument denotes if the file has a header line ?

A. header
B. sep
C. file
D. all of the mentioned
Answer» B. sep
Discussion
11.

________ is used for outputting a textual representation of an R object

A. dput
B. dump
C. dget
D. all of the mentioned
Answer» B. dump
Discussion
12.

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

A. unserialize
B. load
C. get
D. none of the mentioned
Answer» C. get
Discussion