Introduction To R Programming — Part 1 MCQs with Explanations

Data Analysis is the correct answer to “What is the primary purpose of R programming language”. This question is standard in competitive examination syllabi for Introduction To R Programming.

Returns the number of elements is the correct answer to “In R, what does the function length() do”. This question is standard in competitive examination syllabi for Introduction To R Programming.

# Comment is the correct answer to “How is a comment denoted in R”. This question is standard in competitive examination syllabi for Introduction To R Programming.

Install a new package is the correct answer to “What does the function install.packages() do in R”. This question is standard in competitive examination syllabi for Introduction To R Programming.

variable_name_123 is the correct answer to “Which of the following is a correct variable name in R”. This question is standard in competitive examination syllabi for Introduction To R Programming.

An integrated development environment is the correct answer to “What does RStudio provide for R programming”. This question is standard in competitive examination syllabi for Introduction To R Programming.

matrix(1:9, nrow = 3, ncol = 3) is the correct answer to “In R, how is a matrix created using the matrix() function”. This question is standard in competitive examination syllabi for Introduction To R Programming.

Retrieve the current date is the correct answer to “What is the purpose of the function Sys.Date() in R”. This question is standard in competitive examination syllabi for Introduction To R Programming.

All of the above is the correct answer to “Which of the following is a valid R data type”. This question is standard in competitive examination syllabi for Introduction To R Programming.

data.frame(x = 1:3, y = c('A', 'B', 'C')) is the correct answer to “How is a data frame created in R”. This question is standard in competitive examination syllabi for Introduction To R Programming.

Read data from a CSV file is the correct answer to “What does the R function read.csv() do”. This question is standard in competitive examination syllabi for Introduction To R Programming.

var <- 10 is the correct answer to “How do you assign a value to a variable in R”. This question is standard in competitive examination syllabi for Introduction To R Programming.

^ is the correct answer to “Which of the following operators is used for exponentiation in R”. This question is standard in competitive examination syllabi for Introduction To R Programming.

Start an interactive help system is the correct answer to “In R, what does the function help.start() do”. This question is standard in competitive examination syllabi for Introduction To R Programming.

Display a summary of data is the correct answer to “What does the function summary() do in R”. This question is standard in competitive examination syllabi for Introduction To R Programming.

1, 3, 5, 7, 9 is the correct answer to “What does the R function seq(1, 10, by = 2) produce”. This question is standard in competitive examination syllabi for Introduction To R Programming.

class(object) is the correct answer to “How do you check the class of an object in R”. This question is standard in competitive examination syllabi for Introduction To R Programming.

Generate 100 random numbers from a normal distribution with mean 0 and SD 1 is the correct answer to “What is the purpose of the R function rnorm(100, mean = 0, sd = 1)”. This question is standard in competitive examination syllabi for Introduction To R Programming.

* is the correct answer to “Which operator is used for element-wise multiplication in R”. This question is standard in competitive examination syllabi for Introduction To R Programming.

Repeat elements of a vector or a sequence is the correct answer to “In R, what is the purpose of the rep() function”. This question is standard in competitive examination syllabi for Introduction To R Programming.

list(a = 1, b = "hello", c = TRUE) is the correct answer to “How is a list created in R”. This question is standard in competitive examination syllabi for Introduction To R Programming.

Median of a numeric vector is the correct answer to “What does the R function median() compute”. This question is standard in competitive examination syllabi for Introduction To R Programming.

install.packages("package_name") is the correct answer to “How do you install a package in R from the CRAN repository using the install.packages() function”. This question is standard in competitive examination syllabi for Introduction To R Programming.

?mean is the correct answer to “In R, how do you access the help documentation for a specific function, e.g., mean()”. This question is standard in competitive examination syllabi for Introduction To R Programming.

Returns the number of elements in each list element is the correct answer to “What does the lengths() function do in R”. This question is standard in competitive examination syllabi for Introduction To R Programming.

"Hello, World!" is the correct answer to “How is a character string defined in R”. This question is standard in competitive examination syllabi for Introduction To R Programming.

Creates a contingency table is the correct answer to “What does the R function table() do”. This question is standard in competitive examination syllabi for Introduction To R Programming.

data[,"Age"] is the correct answer to “How is the data frame column Age selected in R”. This question is standard in competitive examination syllabi for Introduction To R Programming.

Displays the search path for loaded packages is the correct answer to “What is the purpose of the search() function in R”. This question is standard in competitive examination syllabi for Introduction To R Programming.

mean(vector) is the correct answer to “In R, how is the mean of a numeric vector calculated using the mean() function”. This question is standard in competitive examination syllabi for Introduction To R Programming.

spatial is the correct answer to “Which of the following is "Recommended" package in R”. This question is standard in competitive examination syllabi for Introduction To R Programming.

Character is the correct answer to “What is the class defined by the following R code? y<-c(2,”t”)”. This question is standard in competitive examination syllabi for Introduction To R Programming.

Missing Data is the correct answer to “What will be the output of the following R code? x <- c(3, 7, NA, 4, 7) y <- c(5, NA, 1, 2, 2) x + y”. This question is standard in competitive examination syllabi for Introduction To R Programming.

GNU is the correct answer to “R is published under the . . . . . . . . General Public License version.”. This question is standard in competitive examination syllabi for Introduction To R Programming.

Insightful is the correct answer to “In 2004, . . . . . . . . purchased the S language from Lucent for $2 million.”. This question is standard in competitive examination syllabi for Introduction To R Programming.

Character is the correct answer to “What is the mode of 'a' in the following R code? a <- c(1,” a”, FALSE)”. This question is standard in competitive examination syllabi for Introduction To R Programming.

Commander is the correct answer to “. . . . . . . . provides a point-and-click interface to many basic statistic problems.”. This question is standard in competitive examination syllabi for Introduction To R Programming.

"Everybody is a warrior" is the correct answer to “What will be the output of the following R function? paste("Everybody", "is", “a” , "warrior")”. This question is standard in competitive examination syllabi for Introduction To R Programming.

install.packages ("for", depends = TRUE) is the correct answer to “How to install for a package and all of the other packages on which for depends”. This question is standard in competitive examination syllabi for Introduction To R Programming.

library() is the correct answer to “. . . . . . . . function is used to watch for all available packages in library.”. This question is standard in competitive examination syllabi for Introduction To R Programming.