Explore topic-wise MCQs in R Programming.

This section includes 5 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 opens connection to gz-compressed text file?

A. con <- gzfiles("words.gz")
B. con <- gzfile("words.gz")
C. con <- gzfile2("words.gz")
D. con <- gzfiles2("words.gz")
Answer» C. con <- gzfile2("words.gz")
Discussion
2.

Which of the following code opens a connection to the file foo.txt, reads from it, and closes the connection when its done?

A. data <- read.csv("foo.txt")
B. data <- read.csvo("foo.txt")
C. data <- readonly.csv("foo.txt")
D. data <- getonly.csv("foo.txt")
Answer» B. data <- read.csvo("foo.txt")
Discussion
3.

Which of the following R code creates a connection to 'foo.txt'?

A. con <- file("foo.txt")
B. open(con, "r")
C. opencon(con, "r")
D. ocon(con, "r")
Answer» B. open(con, "r")
Discussion
4.

Connections to text files can be created with the ________ function.

A. url
B. gzfile
C. bzfile
D. file
Answer» E.
Discussion
5.

Which of the following statement will load the objects to the file named "mydata.RData"?

A. save("mydata.RData")
B. load("mydata.RData")
C. loadAll("mydata.RData")
D. put("mydata.RData")
Answer» C. loadAll("mydata.RData")
Discussion